bluuebunny/crossref_metadata_2025 huggingface dataset:
A MultiStack Parallel (MSP) Partition Algorithm Applied to Sorting
Authors: Rattanatranurak Apisit , Kittitornkun Surin
Published: September 2020

The CPUs of smartphones are becoming multicore with huge RAM and storage to support a variety of multimedia applications in the near future. A MultiStack Parallel (MSP) sorting algorithm is proposed and named MSPSort to support manycore systems. It can be regarded as many threads of single-pivot interleaving block-based Hoare’s algorithm. Each thread performs compare-swap operations between left and right (stacked and interleaved) data blocks. A number of multithreading features of OpenMP and our own optimization strategies have been utilized. To simulate those smartphones, MSPSort is fine tuned and tested on four Linux systems, e.g. Intel i7-2600, Xeon X5670, AMD R7-1700 and R9-2920. Their memory configurations can be classified as either uniform or non-uniform memory access. The statistical results are satisfied compared to parallel-mode sorting algorithms of Standard Template Library, namely Balanced QuickSort and MultiWay MergeSort. Moreover, MSPSort looks promising to be developed further to improve both run time and stability.
TREND OF SYNTHETIC PARITY PROGRESSION RATIO (SPPR) OF INDIA: EVIDENCE FROM NATIONAL FAMILY HEALTH SURVEYS
Authors: Bharti Abhishek , Kumar Anup , Singh B. P.
Published: September 2020

Fertility dynamics have been studied in this paper from 1977 to 2015. Regional fertility changes are analyzed using all four rounds of National Family Health Survey (NFHS) data. Synthetic Parity Progression Ratios (SPPR) and Total fertility rate (based on PPR) are used to analyze the fertility trend. Except for first parity, there is a decline in second and higher order birth of all the six regions. Reduction of third and higher order birth is the main reason for this decline.
AN OPTIMIZATION OF FEOQ MODEL FOR WEIBULL DETERIORATING ITEMS WITH INFLATIONARY CONDITION
Authors: Sayal Anu , Singh A. P. , Aggarwal Deepak
Published: September 2020

The economic instability is a haunting situation in the present era for the economy. There is a monetary depreciation due to the tremendous increase in the price of the commodities. Present study basically deals with the investigation of the inventory system considering the case of perishable products under inflationary environment under condition of partial backorder. The rate of demand is a function which exponentially increases with increase in inflation and deterioration is taken as a Weibull distributed two parameter function. In the state of shortage when the inventory system runs out of stock an assumption is made that the demands are backlogged or lost. There is a variation in the rate of backlogging which shows this variation as a consequence of lead time required for the arrival of the next replenishment. The deterioration of commodities begins after a fixed interval of time. Present model aims at minimizing the average total cost considering both the crisp and fuzzy environments considering both inflationary effect as well as the time value of money. For the fuzzy economic order quantity (FEOQ) model of the inventory system fuzzification has been done by the use of fuzzy number of the trapezoidal nature. Defuzzification has been done by the use of centroid method. The primary motive of this work is to determine and compare the cost in total of the system of inventory in both crisp and fuzzy environments. The main inference that we can draw from this study is that fuzzy economic order quantity (FEOQ) model has more accuracy as in this model the total cost has been reduced as compared to the crisp model. Thus fuzzy economic order quantity (FEOQ) model is highly beneficial to any sort of inventory system and this result can be further generalized to any sector for enhancing the total profit of the system. Appropriate example has been provided for the illustration of both the models.
ESTIMATION OF PARAMETERS FOR THE LIFETIME DISTRIBUTIONS
Authors: Sultana Tabasam , Muhammad Faqir , Aslam Muhammad
Published: September 2020

This paper deals with various methods of estimation used for estimating the parameters of lifetime distributions. The distributions considered are exponential, Weibull, Rayleigh, lognormal and gamma and the method used are: method of moments, maximum likelihood, probability weighted moments, least squares and relative least squares. To compare the efficiency between the different methods of estimation, we used the total deviation, mean squared error and probability plot correlation coefficients. In order to study numerically, the execution of the different methods of estimation and goodness of fit analysis, their statistical properties have been simulated for different sample sizes. The graphs of bias designed for different methods of estimation have also been plotted against various sample sizes.
ON USE OF GAMMA DISTRIBUTION FOR EVALUATION OF RELIABILITY AND AVAILABILITY OF A SINGLE UNIT SYSTEM SUBJECT TO ARRIVAL TIME OF THE SERVER
Authors: Nandal N. , Malik S.C.
Published: September 2020

The preference to the use of single unit systems over the redundant systems has been given due to their intrinsic reliability and affordability. And, stochastic modeling of repairable systems of one or more unit has been done by assuming negative exponential distribution for failure and repair times. In fact, the repairable systems may or may not have constant failure and repair rates. In such situations some other distributions possessing monotonic nature of the random variables associated with different time points may be considered. Gamma distribution is one of the distributions that may offer a good fit to some set of failure data. Also, negative exponential distribution is a special case of this distribution. Hence, in this paper reliability and availability of a single unit system by considering Gamma distribution for the random variables associated with failure and repair times of the system have been evaluated. A single server is employed to carry out the repair activities. The server is allowed to take some time to arrive at the system (called arrival time). The system has all the transit points as regenerative and so regenerative point has been used to derive the expressions for reliability measures. The values of reliability and availability are obtained for particular situations of the parameters. The behavior of these measures has been observed for the arbitrary values of the parameters.
Strong enhanced efficiency of natural alginate for polymer solar cells
through modification of the ZnO cathode buffer layer
Authors: Zhang Xiaolin , Shen Wenfei , Bu Fanchen , Wang Yao , Yu Xiaoshuang , Zhang Wenna , Wang Jiuxing , Belfiore Laurence A. , Tang Jianguo
Published: September 2020

Sodium alginate (SA), as a natural marine biopolymer, possesses many
merits such as super-easy accessibility from the ocean, low cost,
nontoxicity, and no synthesis for practical application. For the
chemical structure, SA has enough lone electron pairs of oxygen atoms
in the backbone and short branched chains, which is expected to
passivate oxygen vacancy on the surface of the ZnO cathode buffer
layer to improve the photovoltaic performance. Herein, it was applied
to modify the surface trap of the ZnO layer in fullerene and
non-fullerene polymer solar cells (PSCs). The defects were
successfully reduced, and the trap-assisted recombination decreased.
In a

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:

P
C

71

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system, power conversion efficiency
(PCE) was improved from 8.06% to 9.36%. In the PM6:IT-4F system, PCE
was enhanced from 12.13% to 13.08%. The addition of SA did not destroy
the stability of the device. Overall, this work demonstrates the
potential for preparing devices with long-time stability and
industrial manufacture of PSCs by using biological materials in the
future.
Mieroeombs Eased on Laser Cavity Solitons
Authors: Pasquazi Alessia , Eao Hualong , Rowley Maxwell , Hazard Pierre-Henry , Olivieri Luana , Cutrona Antonio , Wetzel Benjamin , Di Lauro Luigi , Gongora Juan Sebastian Totero , Chu Sai T. , Little Erent E. , Oppo Gian-Luea , Morandotti Roberto , Moss David J. , Peeeianti Mareo
Published: September 2020

We summarize our results on the generation of temporal laser cavity-solitons in a system comprising an optical micro-cavity nested in a fiber laser. We will discuss their features, region of existence, potential and challenges ahead.
Mid-infrared spectra driven by 1.5-cycle pulses from a Tm-doped polarization-maintaining fiber amplifier
Authors: Xing Sida , Kowligy Abijith S. , Lesko Daniel M. B. , Lind Alexander J. , Schunemann Peter , Diddams Scott A.
Published: September 2020

We present a Tm:fiber amplifier emitting octave-spanning 10 fs pulses centered at 1920 nm at 100 MHz repetition rate. Intra-pulse difference frequency generation in GaAs and GaP yields spectra beyond 7 pm .
Phase Retrieval Receiver using Parallel Alternative Projections for Coherent Communications
Authors: Huang Hanzi , Chen Haoshuo , Huang Yetian , Li Zhengxuan , Zhang Qianwu , Fontaine Nicolas K. , Ryf Roland , Song Yingxiong
Published: September 2020

We demonstrate a phase retrieval receiver to recover the full-field with intensity-only measurements based on parallel alternative projections. Phase accuracy improvement is verified by detecting a 30-Gbaud QPSK signal transmitted over 55-km singlemode fiber.
Data-driven Urban Methane Emission Estimates Based on Aircraft Observations: Sensing Considerations and Results
Authors: Plant Genevieve , Kort Eric A , Sweeney Colm
Published: September 2020

Urban methane emissions from major United States East Coast cities are investigated using an aircraft platform equipped with a suite of high precision spectroscopic instrumentation. Sensing details and results will be presented.
Towards Hollow-Core-Fiber Delivery of Broadband Mid-Infrared Light for Remote Spectroscopy
Authors: Kara Oguzhan , Castro-Marin Pablo , Davidson Ian A.K , Wheeler Natalie V. , Poletti F. , Richardson D. J. , Reid Derryck T.
Published: September 2020

We describe progress towards fiber-delivered broadband mid-IR light for multi-species spectroscopy in inaccessible environments. Water and HCl are resolved after propagating 3-pm light through five meters of hollow-core fiber, illustrating the technique's potential.
Light guidance beyond cutoff in optical fibers
Authors: Ma Zelin , Kristensen Poul , Ramachandran Siddharth
Published: September 2020

We demonstrate that light can be guided in higher azimuthal order modes with negligible loss over 100-m lengths, even at wavelengths 100-200 nm past cutoff. This has fundamental implications for the design of multimode fibers.
Versatile Dispersion Measurement via a Reflective Nonlinear Interferometer
Authors: Riazi Arash , Chen Changjia , Zhu Eric Y. , Gladyshev A. V. , Kazansky P. G. , Sipe J. E. , Qian Li
Published: September 2020

We present a novel dispersion measurement technique using a reflective commonpath nonlinear interferometer. Our method is fast, alignment-free, and does not require phasestabilization. It can extract the dispersion for samples with dispersion-length products as small as D × L ~0:007 ps/nm.
Stabilization of Self-Mode-Locked Quantum Dash lasers by symmetric dual-loop optical feedback: effects of power ratio and optical phase tuning
Authors: Asghar Haroon , McInerney John G.
Published: September 2020

We have stabilized self mode-locked quantum dash lasers emitting at 1550nm, reducing pulse train RF linewidth by 100x, using optical feedback from dual fiber loops.
Mid-IR DFG frequency combs with high mode power and 1.5 Hz linewidth using femtosecond fiber laser systems
Authors: Cleft Carsten , Bradler Maximilian , Adel Peter , Matern Stefan , Fischer Marc , Holzwarth Ronald
Published: September 2020

We present DFG frequency comb systems operating between 3 and 5 pm based on femtosecond Er- and Yb-fiber laser-amplifier systems, providing an average power of up to 250 mW and 31 pW per comb mode with 1.5 Hz optical linewidths in the mid-IR.
Noise Correlation Between the Two Degrees of Freedom of a Mid-Infrared Quantum Cascade Laser Frequency Comb
Authors: Shehzad Atif , Brochard Pierre , Komagata Kenichi , Matthey Renaud , Kapsalidis Filippos , Shahmohammadi Mehran , Beck Mattias , Hugi Andreas , Jouy Pierre , Faist Jérôme , Südmeyer Thomas , Schilt Stéphane
Published: September 2020

We present a detailed frequency noise characterization of a mid-infrared QCL comb with separate investigations of an optical line, the mode spacing and the offset frequency, and show strong anti-correlation between the two free-running comb parameters.
97-fs pulses with 10-W average power generated from a Kerr-lens mode-locked Yb:CaYAlO4 oscillator
Authors: Xu Rui , Wang Geyang , Zheng Li , Tian Wenlong , Xu Xiaodong , Zhu Jiangfeng , Wei Zhiyi
Published: September 2020

We demonstrated a diode laser pumped high-power Kerr-lens mode-locked Yb:CaYAlO4 oscillator. 97-fs pulses with up to 10-W average power were obtained with the assistance of an additional Kerr medium in a double confocal cavity.
Analytical model of nonlinear noise in the b-modulated optical transmission systems
Authors: Derevyanko Stanislav , Shepelsky Dmitry , Pankratova Maryna , Vasylchenkova Anastasiia , Chichkov Nikolai , Prilepsky Jaroslaw
Published: September 2020

We propose an analytical channel model for optical communication systems employing the nonlinear division multiplexing scheme using b-modulation and show that as the energy of the NFT burst grows, the noise in the b-coefficient decreases.
Cantilever-Enhanced Photoacoustic Spectroscopy of Radioactive Methane
Authors: Larnimaa Santeri , Karhu Juho , Tomberg Teemu , Genoud Guillaume , Hieta Tuomas , Metsälä Markus , Halonen Lauri , Vainio Markku
Published: September 2020

We report the first high-resolution spectroscopy study of radiocarbon methane, 14CH4. Several absorption lines of the fundamental vibrational band v3 were measured using a continuous-wave mid-infrared optical parametric oscillator with cantilever-enhanced photoacoustic spectroscopy.
Controllable selective coupling of Dyakonov surface wave at liquid-crystal-based interface
Authors: Li Yan , Sun Jingbo , Wen Yongzheng , Zhou Ji
Published: September 2020

A selective coupling behavior of Dyakonov surface wave at the liquid-crystal-based interface has been demonstrated experimentally. Such a highly directional and lossless surface wave has promising applications in two-dimensional photonic circuits and devices.
Optical attosecond pulses and bright VUV generation from soliton dynamics in hollow capillaries
Authors: Travers John C. , Brahms Christian , Grigorova Teodora F. , Belli Federico
Published: September 2020

Soliton dynamics in large-core gas-filled hollow capillary fibres can create high-energy sub-femtosecond and few-femtosecond pulses tuneable across the vacuum ultraviolet to infrared. Our work provides a new platform technology for ultrafast science.
Non-fading Plasmonic Color Printing on Semicontinuous Metal Films with Protective Atomic Layer Deposition
Authors: Chowdhury Sarah N. , Nyga Piotr , Kudyshev Zhaxylyk , Garcia Esteban , Kildishev Alexander V. , Shalaev Vladimir M. , Boltasseva Alexandra
Published: September 2020

A non-fading and environment-friendly technique of generation of bright vivid colors is achieved through femtosecond laser modification of semicontinuous Ag films, which thermally induces changes in the nanostructures resulting in the variation of optical spectra.
A Dry Lift-off Method for Patterning Perovskites
Authors: Chang Cheng , Zou Chen , Odendahl Mark , Lin Lih Y.
Published: September 2020

In this paper, we demonstrate a new method to pattern perovskites using a dry lift-off process. By utilizing parylene-C as a sacrificial layer, patterns with <12 um features and multicolor patterns can be achieved.
Generation of 7 mJ, 115 fs pulses at 2.4 pm, 1 kHz from a Cr:ZnSe amplifier.
Authors: Leshchenko Vyacheslav E. , Talbert Bradford K. , Lai Yu Hang , Li Sha , Blaga Cosmin I. , Agostini Pierre , DiMauro Louis F.
Published: September 2020

We report on the generation of 7 mJ, 115 fs pulses at 2.4 pm and 1 kHz repetition rate from a Cr2+:ZnSe chirped pulse amplifier, which is very promising for applications in strong-field and attosecond physics.
Self-Stabilizing Silicon Nitride Lightsails
Authors: Gao Ramon , Kim Yonghwi , Kim Laura , Kelzenberg Michael D. , Ilic Ognjen , Atwater Harry A.
Published: September 2020

We report a design for a microscopic lightsail prototype that allows for passive stabilization in the radiation-pressure dominated regime. Stable dynamics of our silicon nitride structure are predicted for initial tilts of up to ±10°.
Demonstration of a PMC-SH link using a phase recovery IC for low-power high-capacity DCIs
Authors: Ashok Rakesh , Kamran Rashmi , Naaz Sana , Gupta Shalabh
Published: September 2020

We demonstrate a coherent polarization multiplexed carrier based self-homodyne (PMC-SH) 16-QAM link using a phase synchronization IC and an automatic polarization control technique. The system can replace PAM-4 links to achieve practical high-capacity short-reach DCIs.
Correlation between RF Signal Reflection on Electrodes and Modulation Variation of Silicon Mach-Zehnder Modulators
Authors: Zeng Zhaobang , Zhao Peiyan , Yang Nan , Gao Qianyi , Tang Bo , Li Zhihua , Yan Jiang , Jiang Wei
Published: September 2020

We introduce (partial) correlation coefficients to explore the relation between the driving signal reflection on traveling wave electrodes and the performance variation of silicon Mach- Zehnder modulators. Relevant fabrication variation scenarios and potential remedies are discussed.
Quadratic Soliton Frequency Comb at 4 ٢m from an OP-GaP-based Optical Parametric Oscillator
Authors: Liu Mingchen , Gray Robert M. , Roy Arkadev , Ingold Kirk A. , Sorokin Evgeni , Sorokina Irina , Schunemann Peter G. , Marandi Alireza
Published: September 2020

We report generation of quadratic solitons, i.e. temporal simultons, in an OP-GaP based halfharmonic optical parametric oscillator. We achieve 4-^m pulses with sech2 spectrum of 790nm FWHM bandwidth, 197% slope efficiency, and 38% conversion efficiency.
Spectrum circuit for producing spectrally separated nanosecond pulse train in free space
Authors: Saiki Takao , Ishijima Ayumu , Sakuma Ichiro , Nakagawa Keiichi
Published: September 2020

We propose a free space time-stretching system for producing nanosecond pulse train with easily tunable time interval and spectrum period. In our demonstration experiments, we obtained 6 pulses with the time interval of 1 ns.
Efficient Automated Nanocavity Optimization by Direct Use of Finite Element Method Computation
Authors: Kuramochi Eiichi , Kita Shota , Shinya Akihiko , Notomi Masaya
Published: September 2020

An automated finite-element-method-based optimization code can optimize the position of more than 20 holes generated in an L3 nanocavity with a theoretical Q factor exceeding 2*107 with only 111-sample-cavity generation.
Robust, Fast and Sensitive Near-Infrared Continuous- Filtering Vernier Spectrometer
Authors: Vieira Francisco Senna , Lu Chuang , Silander Isak , Gluszek Aleksander , Sobon Grzegorz , Foltynowicz Aleksandra
Published: September 2020

We present a new robust approach to cavity-enhanced comb spectroscopy based on Vernier filtering, a fixed diffraction grating, custom-made chopper wheel, and a low bandwidth comb-cavity stabilization scheme. We measure a CO2 spectrum with a few GHz resolution and 5 x 10-8 cm-1 sensitivity in 9.4 ms.
Optical Thermalization in Ultrashort Pulse Propagation in Multimode Fiber
Authors: Pourbeyram Hamed , Sidorenko Pavel , Wu Fan O. , Christodoulides Demetrios N. , Wise Frank W.
Published: September 2020

We experimentally investigate a recently-proposed thermodynamic theory of highly multimode nonlinear optical systems. Mode-resolved measurements demonstrate thermalization of the distribution via the Kerr nonlinearity in multimode optical fiber.
Strain Induced Indirect-Direct Bandgap Transition in Bilayer MoTe2
Authors: Yu Yueyang , Ning C. Z
Published: September 2020

We experimentally demonstrate an indirect to direct bandgap transition on bilayer MoTe2 by strain engineering. By applying 0.58% tensile strain, photoluminescence intensity is increased by 2.22 times, and linewidth is reduced by 36%.
Different ultrafast dynamics of neutral and charged excitons in monolayer WS2
Authors: Wang Anran , Wang Yuhan , Li Jianfei , Shi Yi , Wang Fengqiu
Published: September 2020

We investigate a back-gate-controlled monolayer WS2 device using ultrafast pumpprobe spectroscopy. While gate-induced electrostatic doping does not show impact on the transient dynamics, our experiments reveal dramatic difference for lifetimes of neutral and charged excitons.
Multi-Octave Supercontinuum and Sub-Two Cycle Pulse Compression Using NzO-Filled Hollow-Core Fiber
Authors: Beetar John E. , Nrisimhamurty M. , Truong Tran-Chau , Nagar Garima C. , Wu Yi , Shim Bonggu , Chini Michael
Published: September 2020

The delayed optical nonlinearity of molecules is harnessed to generate a multi-octave supercontinuum and compress 280 fs pulses from a commercial Yb:KGW laser amplifier to sub-two cycle duration using an N2O filled hollow-core fiber.
High-speed optical modulation based on Pockels effect in strained silicon waveguides
Authors: Lafforgue Christian , Berciano Mathias , Deniel Lucas , Marcaud Guillaume , Le Roux Xavier , Ramos Carlos Alonso- , Benedikovic Daniel , Vakarin Vladyslav , Ruiz-Caridad Alicia , Crozat Paul , Marris-Morini Delphine , Cassan Eric , Vivien Laurent
Published: September 2020

We report on the first demonstration of high-speed optical modulation exploiting Pockels effect in strained silicon waveguides. Bandwidths larger than 20 GHz and low insertion loss have been achieved at a wavelength of 1550 nm.
Two-dimensional beam steering based on LNOI optical phased array
Authors: Tan Su , Liu Jia , Liu Ye , Li Heng , Lu Qiaoyin , Guo Weihua
Published: September 2020

We designed and fabricated two-dimensional optical beam steering chip based on X-cut LNOI wafer. The device can achieve a maximum angle of 18° in the phase tuning dimension with about 10 dB side lobe suppression ratio.
3D Vertical Coupler Array for 4-Way Multi-Core Fiber-To- Chip Coupling by Two-Photon Lithography
Authors: Chen Lifeng , Luo Haozhi , Cai Xinlun
Published: September 2020

We demonstrate a 3D vertical coupler array design realizing efficient 4-way multi-core fiber to chip coupling via two-photon lithography on SOI platform, structure shows 3dB insertion loss and wide bandwidth is useful in space-division multiplexing.
A High-Sensitivity Plasmonic Photoconductive Terahertz Focal-Plane Array
Authors: Li Xurong , Jarrahi Mona
Published: September 2020

We demonstrate a 63-pixel photoconductive terahertz focal-plane array, which uses plasmonic nanoantennas to maximize terahertz and optical pump interaction at each pixel to provide signal-to-noise-ratios exceeding 60 dB and more than 2 THz bandwidth for all pixels.
Pulse Recovery from Frequency-Resolved-Optical-Gating Traces of Trains of Unstable Pulse Shapes
Authors: Jafari Rana , Trebino Rick
Published: September 2020

We show that the recently introduced RANA FROG pulse-retrieval approach provides an exceptionally reliable indication of pulse-shape stability vs. instability in trains of pulses.
2 μm Microcomb Generation from a Monolithic Lithium Niobate Optical Parametric Oscillator
Authors: Jia Kunpeng , Wang Xiaohan , Ni Xin , Guo Jian , Xie Zhenda , Huang Shu-Wei , Zhu Shi-ning
Published: September 2020

We demonstrate 2 pm frequency comb generation via optical parametric down conversion from a high-quality-factor x(2) optical superlattice box resonator. Low noise comb is achieved with high output power.
Direct bandgap electroluminescence from SiGeSn/GeSn double-heterostructure monolithically grown on Si
Authors: Zhou Yiyin , Miao Yuanhao , Ojo Solomon , Abernathy Grey , Du Wei , Sun Greg , Soref Richard , Liu Jifeng , Zhang Yong-Hang , Mortazavi Mansour , Li Baohua , Yu Shui-Qing
Published: September 2020

Electroluminescence from direct bandgap GeSn double-heterostructure light-emitting diodes grown on Si is presented. Using SiGeSn as the barrier provides better carrier confinement compared GeSn barrier, as evidenced by enhanced emission intensity.
Active Mode-Selective Conversion Enabled by an Elliptical- Core Highly Nonlinear Few-Mode Fiber
Authors: Gao Jitao , Nazemosadat Elham , Yang Yi , Chen Xi , Fu Songnian , Tang Ming , Schroder Jochen , Karlsson Magnus , Andrekson Peter A.
Published: September 2020

We design an elliptical-core highly nonlinear few-mode fiber to achieve mode-selective conversion without parasitic wavelength conversion, using intermodal four-wave mixing. The proposed mode converter can be used in optical cross-connects over the C-band.
Mode-selective frequency conversion in a three-mode fiber
Authors: Shamsshooli Afshin , Guo Cheng , Parmigiani Francesca , Li Xiaoying , Vasilyev Michael
Published: September 2020

We present a scheme for spatial-mode-selective frequency conversion in a few-mode fiber and experimentally demonstrate upconversion of either of two signal modes from C-band to fundamental mode in S-band with crosstalk below -15.5 dB.
Quantum Dot Avalanche Photodetector on Si Substrate
Authors: Chen Baile , Wan Yating , Xie Zhiyang , Huang Jian , Shang Chen , Norman Justin , Li Qiang , Lau Kei May , Gossard Arthur C. , Bowers John E.
Published: September 2020

We demonstrate an InAs quantum dot (QD) avalanche photodetectors (APD) monolithically grown on Si substrate working at 1300 nm. Low dark current and high gain were demonstrated for these QD APDs.
High-Linearity V-Band InGaAs/InP Photodiodes Working at 1064 nm
Authors: Peng Yiwei , Sun Keye , Shen Yang , Beling Andréas , Campbell Joe C.
Published: September 2020

We demonstrate the modified uni-travelling-carrier (MUTC) photodiodes achieving RF power levels of 21.7 dBm to 15 dBm in the frequency range of 39 GHz to 60 GHz, respectively, at 1064 nm wavelength. The photodiodes show good linearity with a third-order intercept point (OIP3) up to 33 dBm at 40 GHz.
Monolithically Fabricated Subwavelength Grating Filters for O-band MUX/DEMUX Applications
Authors: Afzal Francis O. , Peng Bo , Hu Shuren , Dezfulian Kevin , Nummy Karen , Stricker Andy , Aboketaf Abdelsalam , Hedges Crystal , Riggs Dave , Giewont Ken , Weiss Sharon M.
Published: September 2020

We demonstrate low loss (-1.2dB), high extinction ratio (-30dB) and single-source thermal tunability of the first silicon add/drop subwavelength grating filters fabricated at a CMOS foundry, using a commercial, monolithic silicon photonics technology from GlobalFoundries.
Stimulated Brillouin Scattering in AlGaAs on insulator waveguides
Authors: Jin Warren , Chang Lin , Xie Weiqiang , Shu Haowen , Peters Jonathan D. , Wang Xingjun , Bowers John E.
Published: September 2020

We observe stimulated Brillouin scattering (SBS) in AlGaAs-on-insulator integrated waveguides. A guided transverse acoustic mode has a 12.3 GHz Brillouin shift, and a full-width half-maximum of 25 MHz.
In-Situ Monitoring of Homogeneously Catalysed Reactions using Raman Spectroscopy Inside Hollow-Core Photonic Crystal Fibres
Authors: Schorn F. , Aubermann M. , Zeltner R. , Wasserscheid P. , Haumann M. , Joly N. Y.
Published: September 2020

We monitor the reaction of an acid with an alcohol inside a hollow-core photonic crystal fibre using Raman spectroscopy. The method uses tiny amount of chemicals and allows precise measurement of the activation energy.
Dispersion-Managed Soliton Multimode Fiber Laser
Authors: Tegin Ugur , Kakkava Eirini , Rahmani Babak , Psaltis Demetri , Moser Christophe
Published: September 2020

We demonstrate, to the best of our knowledge, the first spatiotemporally mode-locked dispersion-managed fiber laser. The fiber oscillator, which includes a 250 modes multimode fiber section, generates 20 nJ pulses centered at 1034 nm with 730 mW average power, 3.88 ps pulse duration and a Gaussian beam near single mode output profile. The output pulses are compressed to ~97 fs via an external grating compressor.
Beam self-cleaning in tapered Ytterbium-doped multimode fiber with decelerating nonlinearity
Authors: Niang A. , Modotto D. , Tonello A. , Mangini F. , Minoni U. , Fabert M. , Jima M.A. , Egorova O.N. , Levchenko A.E. , Semjonov S.L. , Lipatov D.S. , Couderc V. , Wabnitz S.
Published: September 2020

We demonstrate Kerr self-cleaning of beams in an Ytterbium doped multimode fiber taper with exponentially decreasing nonlinearity, with no accompanying frequency conversion or spectral broadening.
Spatio-Temporal Beam Mapping for Studying Nonlinear Dynamics in Graded Index Multimode Fiber
Authors: Leventoux Y. , Granger G. , Tonello A. , Wabnitz S. , Krupa K. , Millot G. , Février S. , Couderc V.
Published: September 2020

We experimentally demonstrate high-resolution mapping of the spatio-temporal dynamics of the beam cleaning process in graded index multimode fibers. This high-resolution characterization reveals the time-dependent nature of the beam self-cleaning process.
Demonstration of hexagonal boron nitride optical microcavities with Q > 200,000
Authors: Das Anustup , Shandilya Prasoon K. , Lee Dong Jun , Kim Sejeong , Gumin Kang , Lake David P. , Mitchell Matthew , Aharonovich Igor , Park Jaehyun , Barclay Paul E.
Published: September 2020

Hexagonal boron nitride is a unique opto-electrical 2D material that hosts ultrabright quantum emitters and is an emerging candidate for integrated quantum-optical system. Here we demonstrate hBN integrated microdisk optical resonators with optical quality factor > 2.8 X 105.
Supercontinuum Generation in Dispersion Engineered 4H-SiC-on-insulator Waveguides at Telecom Wavelengths
Authors: Zheng Yi , Pu Minhao , Guan Pengyu , Yi Ailun , Oxenlnwe Leif Katsuo , Ou Xin , Ou Haiyan
Published: September 2020

We characterize pulse spectral broadening in dispersion-engineered 4H-SiC-on- insulator waveguides. We demonstrate, for the first time, supercontinuum generation in SiC waveguides. We achieve a 30-dB bandwidth over 300 nm by using 510-fs pulses as the pump.
Low-loss Thin Film Lithium Niobate Bonded on Silicon Nitride Waveguides
Authors: Ghosh Siddhartha , Yegnanarayanan Siva , Ricci Matthew , Kharas Dave , Juodawlkis Paul
Published: September 2020

We demonstrate heterogeneous integration of thin film LiNbO3 on SÌ3N4 photonic integrated circuits with SiO2, AI2O3 and direct bonding. We report record low losses in bonded ring resonators of 0.4 dB/cm (intrinsic Q = 8.19x105).
Femtosecond Laser Nano-Filament Explosion: Opening Fiber Bragg Gratings for Opto-Fluidic Sensing
Authors: Herman Peter R. , Aghdami Keivan Mahmoud , Ertorer Erden , Ho Stephen , Li Jianzhao , Rahnama Abdullah
Published: September 2020

Aberrated femtosecond laser pulses were applied to telecommunication fiber to open nano-filament arrays through the silica cladding and waveguide cross-section. Strong photonic bandgap response from n-shifted, second-order Bragg gratings enabled high resolution refractive index sensing. ©2020 The Author(s)
Non-Perturbative Modeling of Ultrafast Photoionization of Transparent Solids: from the Keldysh Formula to a Model for Few-Cycle Laser Pulses
Authors: Gruzdev Vitaly , Sergaeva Olga
Published: September 2020

Based on the Keldysh concept of laser-driven electron oscillations, we overview recent progress in development of non-perturbative approaches to simulation of the photoionization of non-metal crystals by few-cycle ultrashort laser pulses with non-zero spectral bandwidth.
Dual Wavelength Laser Excitation of Bandgap Materials: Challenges for Efficient Energy Coupling
Authors: Bulgakova Nadezhda M. , Zhukov Vladimir P. , Sladek Juraj , Mirza Inam , Bulgakov Alexander V.
Published: September 2020

Theoretical and experimental studies have demonstrated that bi-chromatic laser action on bandgap materials can result in highly enhanced efficiency of local energy coupling at properly chosen combinations of wavelengths and energies.
Optical Manipulation and Assembly of Colloidal Particles on Solid Substrates
Authors: Li Jingang , Zheng Yuebing
Published: September 2020

We report optical nanomanipulation and assembly of colloidal particles on a solid substrate by modulating particle-substrate interactions through laser-induced optothermal dynamics. © 2020 The Author(s)
Low-loss D-shape Silicon Nitride Waveguides Using a Dielectric Lift-off Fabrication Process
Authors: Zhao Qiancheng , Wang Jiawei , Chauhan Nitesh , Bose Debapam , Jin Naijun , Moreira Renan , Behunin Ryan , Rakich Peter , Blumenthal Daniel
Published: September 2020

D-shape SÌ3N4 waveguides are fabricated by dielectric lift-off process. We measure ultra-low loss for a 90nm-thick core of 2.42 dB/m at 1550 nm and a loaded Q-factor of 1.12x106 for a 0.8 mm radius resonator.
Fabry-Perot Filter-Based Mode-Group Demultiplexers
Authors: Vanani Fatemeh Ghaedi , Fardoost Alireza , Li Guifang
Published: September 2020

A novel mode-group demultiplexer using Fabry-Perot (FP) filters has been proposed and designed to enable low-crosstalk demultiplexing of mode groups with degeneracies commensurate with those of graded-index (GRIN) MMFs.
Dual-comb photoacoustic spectroscopy of a polymer film
Authors: Friedlein J. T. , Baumann E. , Briggman K. A. , Colacion G. M. , Giorgetta F. R. , Herman D. , Hoenig E. V. , Hwang J. , Newbury N. R. , Perez E. F. , Yung C. S. , Coddington I. , Cossel K. C.
Published: September 2020

Dual-comb photoacoustic spectroscopy (DCPAS) is a new spectroscopy technique that measures photoacoustic signals in thousands of wavelength bands simultaneously. We report the first demonstration of this technique and show DCPAS spectra of polymer films. Work of the United States government, not subject to copyright.
Ultra-Broadband Silicon Photonic Interleaver for Massive Channel Count Frequency Combs
Authors: Rizzo Anthony , Cheng Qixiang , Daudlin Stuart , Bergman Keren
Published: September 2020

We demonstrate an ultra-broadband interleaver operating over 100 nm for interleaving frequency comb lines with a box-like spectral response. This demonstration paves the way for fully-integrated wavelength division multiplexed transceivers scalable to hundreds of wavelengths.
Demonstration of PAM-4 Data Transmission from a Modulation Instability Induced Frequency Comb
Authors: Shirpurkar Chinmay , Bustos-Ramirez Ricardo , Yu Su-Peng , Briles Travis C. , Papp Scott B. , Delfyett Peter
Published: September 2020

We demonstrate PAM-4 modulation on a modulation instability frequency comb, generated by tuning through the cavity resonance of a Kerr microresonator. We determine the BER for the corresponding eye diagram. ©2020 The Author(s)
All-fiber Short-wavelength Mode-locked Fiber Laser and Amplifier Using Normal Dispersion Thulium-doped Fiber
Authors: Chen Shaoxiang , Chen Yuhao , Sidharthan Raghuraman , Liu Kun , Chang Chen Jian , Wang Qi Jie , Tang Dingyuan , Yoo Seongwoo
Published: September 2020

A W-type normal dispersion thulium-doped fiber with distributed filtering effect at long wavelengths is exploited for short-wavelength pulse amplification. We achieved a pulse laser with high energy of~ 32.7-nJ at 1755-nm and no pulse break-up.
Generation of Femtosecond Pulses at 1080 nm and 1200 nm in Ytterbium-Doped Fiber
Authors: Buttolph Michael L. , Sidorenko Pavel , Mejooli Menansili A. , Schaffer Chris B. , Wise Frank W.
Published: September 2020

We demonstrate a synchronously-pumped Raman oscillator that generates a 48 nJ Stokes pulse at 1200 nm and a 43 nJ pulse at 1080 nm, extending the spectral range of conventional ytterbium-doped silica fiber-based ultrafast sources.
High-frequency GaAs bullseye optomechanical resonator
Authors: Carvalho Natalia C. , Benevides Rodrigo , Ménard Michaël , Wiederhecker Gustavo S. , Frateschi Newton C. , Alegre Thiago P. M.
Published: September 2020

We fabricated and measured a GaAs bullseye resonator able to operate above 3 GHz when coupled to whispering gallery optical modes. Our large phononic bandgap allowed us to observe the symmetry break caused by the material anisotropy and obtain optomechanical coupling rates above 30 kHz.
Tunable Repetition Rates in Compound Cavity Mode Locked Laser Diodes using External Reflector
Authors: Chen Jianfei , Paul Banaful , Coleman A. Catrina
Published: September 2020

We report on the harmonic mode-locking effects in external reflector compound cavity laser diodes. By forming the semiconductor-air compound cavity, the pulse repetition rate changed from 33GHz to 231GHz and 75 GHz to 225GHz.
Coherent Frequency Comb with 100 GHz Spacing Generated by an Asymmetric MQW Mode-Locked Laser
Authors: Liu Yihui , Huang Yongguang , Zhang Ruikang , Wang Jiankun , Wang Baojun , Hou Bin , Marsh John H. , Hou Lianping
Published: September 2020

A coherent frequency comb with a 100 GHz frequency spacing, -3 dB bandwidth of 8.05 nm and pulse width of 440 fs, was generated using an asymmetric multiple quantum well mode locked laser.
Impact of Atmospheric Turbulence on Frequency Comb Optical Timing Jitter
Authors: Hannah Emily D. , Swann William C. , Ellis Jennifer L. , Bodine Martha I. , Mak Carter , Kuczun Nathan , Newbury Nathan R. , Sinclair Laura C. , Muschinski Andreas , Rieker Gregory B.
Published: September 2020

We characterize the impact of turbulence on optical pulse timing jitter over a uniform, near-ground path and compare the results with theory. Use of frequency combs enabled phase- continuous measurements down to 200-fs over multiple hours.
Time-Resolved Mid-Infrared Dual-Comb Spectroscopy of Methane in an Electrical Discharge
Authors: Abbas Muhammad Ali , Pan Qing , Mandon Julien , Harren Frans J. M. , Khodabakhsh Amir
Published: September 2020

A time-resolved mid-infrared dual-comb spectrometer with a spectral bandwidth of ~300 cm-1 and 6 GHz spectral resolution is used to monitor the dynamics in a CH4 discharge plasma with 20 μs temporal resolution. © 2020 The Author(s)
Laser Microfabrication of Metal Surfaces by Tightly Focused Higher-Order Vector Beams
Authors: Sato Masaki , Kozawa Yuichi , Sato Shunichi
Published: September 2020

We present an experimental study on laser microfabrication of metal surfaces by using femtosecond, higher-order vector beams. The contribution of the longitudinal electric field in laser ablation depends on target material.
High-Speed Broadband Plasmonic-Silicon Modulator Integrated with Epsilon-near-zero Conductive Oxide
Authors: Zhou Bokun , Li Erwen , Bo Yunfei , Hsu Wei-Che , Wang Alan X.
Published: September 2020

We demonstrated a compact broadband plasmonic-silicon electro-absorption modulator driven by epsilon-near-zero conductive oxide, covering the entire C-band from 1515nm to 1580nm wavelength. It achieved 3.5 GHz modulation bandwidth and 4.5 Gb/s data rate.
Graphene-assisted electro-optomechanical integration on a silicon-on-insulator platform
Authors: Xi Xiang , Chen Zefeng , Xu Jian-Bin , Sun Xiankai
Published: September 2020

We demonstrated for the first time graphene-assisted electro-optomechanical integration on a silicon-on-insulator platform. Various mechanical modes were effectively actuated with mechanical Q as high as ~1000 measured in air.
Real-time noise measurement in supercontinuum generation in PM and non-PM ANDi tellurite fibers
Authors: Shreesha Rao D. S. , Karpate Tanvi , Ghosh Amar Nath , Klimczak Mariusz , Pysz Dariusz , Buczynski Ryszard , Billet Cyril , Bang Ole , Dudley John M. , Sylvestre Thibaut
Published: September 2020

We compare real-time noise measured using dispersive Fourier transform spectroscopy in supercontinuum generated in PM and non-PM all-normal dispersion tellurite fibers and show that PM fiber provides better stability and higher coherence.
Thulium-doped fiber laser mode-locked from nonlinear multimode interference in chalcogenide fiber
Authors: Zhang Kaixuan , Rochette Martin
Published: September 2020

A step-index chalcogenide fiber with multimode interference effect is used to realize an all-fiber saturable absorber with modulation depth of 8.5%. The saturable absorber is used to trigger pulses from a mode-locked fiber laser.
Single-chip heterodyne characterization of heralded ring resonator photon pair source
Authors: Ferranti Giacomo , Raffaelli Francesco , Mahler Dylan H. , Tasker Joel , Frazer Jonathan , Santamato Alberto , Sinclair Gary , Bonneau Damien , Thompson Mark G. , Matthews Jonathan C. F.
Published: September 2020

We perform on-chip heterodyne tomography of the quantum state generated by a heralded microring single photon source. The quantum state is generated and characterized without ever being coupled off-chip.
Diffractive chips for magneto-optical trapping of two atomic species
Authors: Yu Zhaoning , Hickman Garrett , Saffman Mark , Kats Mikhail A.
Published: September 2020

We investigate diffractive grating chips that can be used as part of a magneto-optical trap (MOT) to trap both Rb and Cs atoms with a single input beam for each atom species.
High-Gyrotropy Seedlayer-Free Ce:TbIG for Monolithic Laser-Matched SOI Optical Isolators
Authors: Srinivasan Karthik , Zhang Cui , Dulal Prabesh , Radu Cosmin , Gage Thomas E. , Hutchings David C. , Stadler Bethanie J. H.
Published: September 2020

Monolithic optical isolators that provide polarization diversity, dimensional (500 nm core) matching to on-chip lasers and magnetless operation have been realized with “one step” seedlayer-free garnet in a non-reciprocal mode conversion design.
Demonstration of compact high-Q Ge11.5As24Se64.5 chalcogenide microring resonators in telecom band
Authors: Jiang Wei C. , Li Kangmei , Gai Xin , Wright Stephen F. , Nolan Daniel A. , Dainese Paulo
Published: September 2020

We demonstrate compact Ge11
.
5As24Se64
.
5 chalcogenide microring resonators with a radius of 20 µm and achieve a high intrinsic optical quality factor of 3.8×105 in telecom band, which corresponds to a low propagation loss around 1.4 dB/cm.
Energy-Efficient Thermo-Optic Phase Shifter with a Small Footprint Based on a Silicon Spiral Waveguide
Authors: Qiu Huaqing , Liu Yong , Luan Chao , Kong Deming , Guan Xiaowei , Ding Yunhong , Hu Hao
Published: September 2020

We experimentally demonstrate a thermo-optic phase shifter based on a densely distributed silicon spiral waveguide, with power consumption, insertion loss, footprint and modulation bandwidth of 3 mW/π, 0.9 dB, 28×67 μm2 and 39 kHz respectively.
Coherent parallel binary-weighted digital-to-analog converter in silicon photonics
Authors: Meng Jiawei , Miscuglio Mario , George Jonathan , Babakhani Aydin , Sorger Volker J.
Published: September 2020

Here, we introduce a coherent parallel photonic DAC concept along with an experimental demonstration based on binary-weighted bits in a silicon PIC platform unlike other concepts capable of performing the conversion without optical-electronic-optical domain crossings.
New Approach to Beam Diagnostics for High-Power Fiber Lasers
Authors: McNamara Arianna Meenakshi , McNamara Shamus , Jones John G. , Hopkins F. Kenneth
Published: September 2020

The average propagating power in an optical fiber can be derived from the forward and backward Mie scattered light intensities, and the mode structure can be derived from the interference pattern near the fiber.
High-power core-pumped quasi 4 kW Raman fiber lasers
Authors: Wang Zehui , Qi Tiancheng , Huang Yusheng , Tian Jiading , Yan Ping , Xiao Qirong , Gong Mali
Published: September 2020

High-power core-pumped Raman fiber lasers are researched theoretically and experimentally. We built multi-frequency model to simulate the power and spectrum of Raman laser. We also established quasi 4-kW Raman fiber laser at 1124 nm.
RI-Insensitive Surface-enhanced Raman Spectroscopy (SERS) for Label-free Profiling and Classification of Living Cancer Cells
Authors: Nam Wonil , Ren Xiang , Tali Seied Ali Safiabadi , Ghassemi Parham , Kim Inyoung , Agah Masoud , Zhou Wei
Published: September 2020

Abstract: By supporting uniform arrays of hot spots with significant SERS enhancement factors (> 107) insensitive to background refractive-index (RI) variations, nanolaminate plasmonic substrates can enable label-free molecular profiling and statistical classification of living cancer cells.
Broadband parametric-gain optimization of partially deuterated KDP with two-wavelength tuning curves
Authors: Dorrer C. , Begishev I A. , Bahk S.-W. , Bromage J.
Published: September 2020

We investigate the use of phase-matching parametric-gain curves at two wavelengths to determine the deuteration level of a partially deuterated KDP ciystal and optimize its broadband performance for optical parametric chirped-pulse amplification.
Turn-Key, High-Efficiency Kerr Comb Source
Authors: Kim Bok Young , Okawachi Yoshitomo , Jang Jae K. , Yu Mengjie , Ji Xingchen , Zhao Yun , Joshi Chaitanya , Lipson Michal , Gaeta Alexander L.
Published: September 2020

We demonstrate automated Kerr comb generation in the normal group-velocity dispersion regime. Using a coupled-ring geometty, we precisely control the spectral positions of avoided mode crossings to generate coherent combs with 41% pump-to-comb conversion efficiencies.
Topological nanophotonic circuits based on valley kink states
Authors: Ma Jingwen , Xi Xiang , Sun Xiankai
Published: September 2020

We experimentally demonstrated topological light manipulation based on valley kink states, achieving waveguiding, refracting, resonating, and routing of photons on a silicon-on- insulator platform. These functionalities are essential for the development of large-scale backscattering-free photonic systems.
High Power (> 300 mW) 1550 nm On-Chip Laser Realized Using Passively Aligned Hybrid Integration
Authors: Kharas Dave , Plant Jason , Bramhavar Suraj , Loh William , Swint Reuel , Sorace-Agaskar Cheryl , Heidelberger Christopher , Juodawlkis Paul
Published: September 2020

We present the flip-chip integration of a slab coupled optical waveguide amplifier (SCOWA) with a silicon-nitride waveguide DBR, creating an external cavity laser emitting 312 mW with RIN of <-160 dB/Hz.
Experimental Demonstration of a Data Correlation and Data Equalization using a Tunable Optical Tapped-Delay-Line Using the Spatial Domain and Modal-Dependent Delays
Authors: Almaiman A. , Song H. , Minoofar A. , Song H. , Zhang R. , Su X. , Zou K. , Pang K. , Liu C. , Liao P. , Hu N. , Zhao Z. , Tur M. , Willner A. E.
Published: September 2020

We demonstrate a tunable OTDL using the orbital angular momentum modal domain to create the taps through mode-multicasting. We demonstrate 2-3 tap correlation and equalization. Equalization results show EVM improvement for a 20-Gbaud QPSK with chromatic dispersion of 20-km from EVM=26.3% to EVM=11.4%
Active-passive Integration on III-V-OI Platform using Quantum Well Intermixing
Authors: Sekine Naoki , Toprasertpong Kasidit , Takagi Shinichi , Takenaka Mitsuru
Published: September 2020

We investigated quantum well intermixing for III-V on insulator platform to achieve active-passive integration. Owing to P2 implantation into multi quantum well, we monolithically integrated passive waveguide and waveguide photodetector with responsivity of 0.4 A/W.
Magnetically Tuned THz Nonlinearity in Bilayer Graphene Disc Arrays
Authors: Chin Matthew L. , Stawitzki Florian , Matschy Sebastian , Poojali Jayaprakash , Hafez Hassan A. , Turchinovich Dmitry , Winnerl Stephan , Kumar Gagan , Myers-Ward Rachael L. , Dejarld Matthew T. , Daniels Kevin , Murphy Thomas E. , Mittendorff Martin
Published: September 2020

We study the nonlinear plasmonic response of bilayer graphene disks using terahertz pump probe spectroscopy. An applied magnetic field induces a splitting in the plasmon resonance, which is shown to tune the nonlinear response.
Ultraviolet to Mid-Infrared Supercontinuum Generation in Lithium-Niobate Waveguides
Authors: Yu Mengjie , Shao Linbo , Okawachi Yoshitomo , Gaeta Alexander L. , Loncar Marko
Published: September 2020

Using a single dispersion-engineered lithium-niobate waveguide, we demonstrate broadband supercontinuum generation leveraging both second- and third-order nonlinear interactions. We achieve a spectrum spanning from 350 nm to 4100 nm using 240 pJ pulse energies.