Search query: photonic integrated circuit

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abstract: We propose a scheme for reservoir computing using multiple semiconductor lasers with optical feedback arranged in parallel on a photonic integrated circuit, and we investigate the performance of reservoir computing numerically. The virtual nodes are obtained from the temporal waveforms of the outputs of the parallel reservoir lasers. We test the chaotic time series prediction task, memory capacity, and nonlinear channel equalization task to investigate the performance of reservoir computing. We found that our scheme using multiple lasers outperforms that using a single laser with multiple delay times. Large memory capacity can also be obtained for the multiple lasers. Finally, we investigate the effect of parameter mismatch of the multiple lasers on reservoir computing performance.
author_names: Chihiro Sugano

Kazutaka Kanno

Atsushi Uchida
title: Reservoir Computing Using Multiple Lasers With Feedback on a Photonic Integrated Circuit
venue: IEEE Journal of Selected Topics in Quantum Electronics
year: 2020

abstract: Microwave photonics (MWP) studies the interaction between microwaves and optical waves for the generation, transmission, and processing of microwave signals (i.e. three key domains) taking advantage of the broad bandwidth and low loss offered by modern photonics. Integrated MWP using photonic integrated circuits (PICs) can reach a compact, reliable, and green implementation. Most PICs, however, are recently developed to perform one or more functions restricted inside a single domain. Herein, as highly desired, a multifunctional PIC is proposed to cover the three key domains. The PIC is fabricated on an InP platform by monolithically integrating four laser diodes and two modulators. Using the multifunctional PIC, seven fundamental functions across microwave signal generation, transmission, and processing are demonstrated experimentally. Outdoor field trials for electromagnetic environment surveillance along in service high speed railways are also performed. The success of such a PIC marks a key step forward for practical and massive MWP implementations.
author_names: Xihua Zou

Fang Zou

Zizheng Cao

Bing Lu

Xianglei Yan

Ge Yu

Xiong Deng

Bin Luo

Lianshan Yan

Wei Pan

Jianping Yao

Antonius M J Koonen
title: A Multifunctional Photonic Integrated Circuit for Diverse Microwave Signal Generation, Transmission, and Processing
venue: Laser Photonics Reviews
year: 2019

abstract: We present a photonic integrated circuit (PIC) transceiver for frequency modulated continuous wave (FMCW) LiDAR applications. The transmitter consists of a widely tunable sampled grating distributed Bragg reflector laser (SGDBR) and a frequency discriminator which combines multimode interference couplers, a tunable asymmetric Mach Zehnder Interferometer (a MZI) and balanced photodiodes. The frequency discriminator converts frequency fluctuations of the laser to amplitude fluctuations of the photodiode currents. This provides an error signal for feedback into the laser cavity for frequency stabilization. Frequency modulation is obtained by a phase shifter in the a MZI which tunes the quadrature point of the filter and the frequency where the error is zero. An on chip receiver couples power from the transmitter to self heterodyne with the time delayed echo of a distant object. The generated beat frequency of the self heterodyne measurement gives the echo signals time of flight to obtain the distance and velocity of the reflecting object. The theory of the components is described, and characterization of the transmitter and receiver is presented.
author_names: Brandon J Isaac

Bowen Song

Sergio Pinna

Larry A Coldren

Jonathan Klamkin
title: Indium Phosphide Photonic Integrated Circuit Transceiver for FMCW LiDAR
venue: IEEE Journal of Selected Topics in Quantum Electronics
year: 2019

abstract: Photonic reservoir computing is a new paradigm for performing high speed prediction and classification tasks in an efficient manner. The major challenge for the miniaturization of photonic reservoir computing is the need for the use of photonic integrated circuits. Herein, we experimentally demonstrate reservoir computing using a photonic integrated circuit with a semiconductor laser and a short external cavity. We propose a method to increase the number of virtual nodes in delayed feedback using short node intervals and outputs from multiple delay times. We perform time series prediction and nonlinear channel equalization tasks using reservoir computing with the photonic integrated circuit. We show that the photonic integrated circuit with optical feedback outperforms the photonic integrated circuit without optical feedback for prediction tasks. To enhance the memory effect we feed past input signals in the current input data and demonstrate successful performance in an n step ahead prediction task.
author_names: Kosuke Takano

Chihiro Sugano

Masanobu Inubushi

Kazuyuki Yoshimura

Satoshi Sunada

Kazutaka Kanno

Atsushi Uchida
title: Compact reservoir computing with a photonic integrated circuit.
venue: Optics express
year: 2018

abstract: The interaction of optical and acoustic waves via stimulated Brillouin scattering (SBS) has recently reached on chip platforms, which has opened new fields of applications ranging from integrated microwave photonics and on chip narrow linewidth lasers, to phonon based optical delay and signal processing schemes. Since SBS is an effect that scales exponentially with interaction length, on chip implementation on a short length scale is challenging, requiring carefully designed waveguides with optimized opto acoustic overlap. In this work, we use the principle of Brillouin optical correlation domain analysis to locally measure the SBS spectrum with high spatial resolution of 800 mm and perform a distributed measurement of the Brillouin spectrum along a spiral waveguide in a photonic integrated circuit. This approach gives access to local opto acoustic properties of the waveguides, including the Brillouin frequency shift and linewidth, essential information for the further development of high quality photonic phononic waveguides for SBS applications.The interaction of optical and acoustic waves via stimulated Brillouin scattering (SBS) has recently reached on chip platforms, which has opened new fields of applications ranging from integrated microwave photonics and on chip narrow linewidth lasers, to phonon based optical delay and signal processing schemes. Since SBS is an effect that scales exponentially with interaction length, on chip implementation on a short length scale is challenging, requiring carefully designed waveguides with optimized opto acoustic overlap. In this work, we use the principle of Brillouin optical correlation domain analysis to locally measure the SBS spectrum with high spatial resolution of 800 mm and perform a distributed measurement of the Brillouin spectrum along a spiral waveguide in a photonic integrated circuit. This approach gives access to local opto acoustic properties of the waveguides, including the Brillouin frequency shift and linewidth, essential information for the further development of high quality photonic.
author_names: Atiyeh Zarifi

Birgit Stiller

Moritz Merklein

Neuton Li

Khu Vu

Duk-Yong Choi

Pan Ma

Steve J Madden

Benjamin J Eggleton
title: Highly localized distributed Brillouin scattering response in a photonic integrated circuit
year: 2018

abstract: We report for the first time the successful wavelength stabilization of two hybrid integrated InP/Polymer DBR lasers through optical injection. The two InP/Polymer DBR lasers are integrated into a photonic integrated circuit, providing an ideal source for millimeter and Terahertz wave generation by optical heterodyne technique. These lasers offer the widest tuning range of the carrier wave demonstrated to date up into the Terahertz range, about 20 nm (2.5 THz) on a single photonic integrated circuit. We demonstrate the application of this source to generate a carrier wave at 330 GHz to establish a wireless data transmission link at a data rate up to 18 Gbit/s. Using a coherent detection scheme we increase the sensitivity by more than 10 dB over direct detection.
author_names: Guillermo Carpintero

Shintaro Hisatake

David de Felipe

Robinson Cruzoe Guzman

Tadao Nagatsuma

Norbert Keil
title: Wireless Data Transmission at Terahertz Carrier Waves Generated from a Hybrid InP Polymer Dual Tunable DBR Laser Photonic Integrated Circuit
venue: Scientific Reports
year: 2018

abstract: For the first time, an integrated electro optical RF modulator based on the quadratic electro optical effect with CMOS compatible sub volt driver voltages is presented. As unique feature, this modulator provides an amplitude tuning of the modulated carrier wave. The silicon based modulator was fabricated using process steps of an established photonic integrated circuit technology and covered by a nonlinear optical polymer in a post process. We demonstrate a device tunability of up to 350 pm/V, surpassing state of the art silicon modulators with an order of magnitude. Moreover, the ring resonator is designed to have an ultra low per bit energy consumption of 87 aJ/bit demonstrating the potential for high performance photonic devices with low energy consumption.
author_names: Patrick Steglich

Christian Mai

Anna Peczek

Falk Korndorfer

Claus Villringer

Birgit Dietzel

Andreas Mai
title: Quadratic electro optical silicon organic hybrid RF modulator in a photonic integrated circuit technology
venue: 2018 IEEE International Electron Devices Meeting (IEDM)
year: 2018

abstract: This paper summarizes the recent advances of integrated hybrid InP/SOI lasers and transmitters based on edge coupling. First, we review the different integration methods between III V material and silicon. Then, we focus on using an external III V chip coupled via edge coupling to our silicon photonic integrated circuit. The paper reports on the results of wavelength tunable lasers containing one or two ring resonators as well as an integrated reflectivity tunable mirror. We demonstrate that a wide thermal tuning range, exceeding the C band, with a high side mode suppression ratio above 35 dB can be achieved. Design of external silicon cavities enables the realization of a broad range of on chip functionalities as well as advanced hybrid transmitters. Parallel wavelength tunable cavities and compact variable optical attenuator controlled arrayed waveguide gratings on silicon are integrated with a reflective semiconductor optical amplifiers, creating fast wavelength switching lasers. Furthermore, integrated transmitters that combine silicon modulators with tunable hybrid III V/Si lasers are reported. The integrated transmitter for on off keying signal generation exhibits more than 30 nm wavelength tunability and excellent bit error rate performance up to 40 Gb/s. A multichannel integrated transmitter is then reported with combined silicon based arrayed waveguide gratings laser cavity and multiple ring modulators. Finally, an advanced wavelength tunable hybrid III V/Si transmitter with two microring modulators nested in a Mach Zehnder interferometer is demonstrated for quadrature phase shift keying generation where a BPSK signal is generated by each ring.
author_names: Guilhem de Valicourt

Chia-Ming Chang

Michael S Eggleston

Argishti Melikyan

Chen Zhu

Jeffrey Lee

Jesse E Simsarian

Sethumadhavan Chandrasekhar

Jeffrey H Sinsky

Kwangwoong Kim

Po Dong

Anaelle Maho

Agnes Verdier

Romain Brenot

Young-Kai Chen
title: Photonic Integrated Circuit Based on Hybrid III V/Silicon Integration
venue: Journal of Lightwave Technology
year: 2018

abstract: We report on the heterogeneous integration of electrically pumped InP Fabry Perot lasers on a SOI photonic integrated circuit by transfer printing. Transfer printing is a promising micromanipulation technique that allows the heterogeneous integration of optical and electronic components realized on their native substrate onto a target substrate with efficient use of the source material, in a way that can be scaled to parallel manipulation and that allows mixing components from different sources onto the same target. We pre process transfer printable etched facet Fabry Perot lasers on their native InP substrate, transfer print them into a trench defined in an SOI photonic chip and post process the printed lasers on the target substrate. The laser facet is successfully butt coupled to the photonic circuit using a silicon inverse taper based spot size converter. Milliwatt optical output power coupled to the Si waveguide circuit at 100 mA is demonstrated.
author_names: Joan Juvert

Tommaso Cassese

Sarah Uvin

Andreas de Groote

Brad Snyder

Lieve Bogaerts

Geraldine Jamieson

Joris Van Campenhout

Gunther Roelkens

Dries van Thourhout
title: Integration of etched facet, electrically pumped, C band Fabry Perot lasers on a silicon photonic integrated circuit by transfer printing.
venue: Optics express
year: 2018

abstract: We report a compact, scalable, quantum photonic integrated circuit realised by combining multiple, independent InGaAs/GaAs quantum light emitting diodes (QLEDs) with a silicon oxynitride waveguide circuit. Each waveguide joining the circuit can then be excited by a separate, independently electrically contacted QLED. We show that the emission from neighbouring QLEDs can be independently tuned to degeneracy using the Stark Effect and that the resulting photon streams are indistinguishable. This enables on chip Hong Ou Mandel type interference, as required for many photonic quantum information processing schemes.
author_names: David J P Ellis

Anthony J Bennett

Christian Dangel

James P Lee

J P Griffiths

Thomas A Mitchell

Taofiq K Paraiso

Peter D Spencer

David A Ritchie

Andrew J Shields
title: Independent indistinguishable quantum light sources on a reconfigurable photonic integrated circuit
year: 2018