Search query: Distributed Feedback Laser Diodes and Optical Tunable Filters

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abstract: Preface.Acknowledgements.Glossary of Abbreviations.Glossary of Symbols.1. An Introduction to Optical Communication Systems.2. Principles of Distributed Feedback Semiconductor Laser Diodes: Coupled Wave Theory.3. Structural Impacts on the Solutions of Coupled Wave Equations: An Overview.4. Transfer Matrix Modelling in DFB Semiconductor Lasers.5. Threshold Analysis and Optimization of Various DFB LDs Using the Transfer Matrix Method.6. Above Threshold Characteristics of DFB Laser Diodes: A TMM Approach.7. Above Threshold Analysis of Various DFB Lase r Structures Using the TMM.8. Circuit and Transmission Line Laser Modelling (TLLM) Techniques.9. Analysis of DFB Laser Diode Characteristics Based on the Transmission Line Modelling (TLLM).10. Wavelength Tunable Optical Filters Based on DFB Laser Structures.11. Other Wavelenght Tunable Optical Filters Based on the DFB Laser Structure.12. Conclusion, Summary and Suggestions.Index.
author_names: Hooshang Ghafouri-Shiraz
title: Distributed feedback laser diodes and optical tunable filters
year: 2003

abstract: A photonic wavelength division switching system using semiconductor tunable wavelength filters is proposed. A switching system using wavelength switches and multistage switching networks is discussed. A crucial point in developing this switching system is to achieve a large number of wavelength division channels. The potential of 100 wavelength division channels in such switching systems is estimated, based on InP optical integrated circuits. A wavelength network synchronization which permits the network to utilize such a large number of wavelength division channels without wavelength misalignment and drift is proposed. An eight channel wavelength division switching experiment, using phase shift controlled distributed feedback laser diodes as tunable wavelength filters, is reported.
author_names: Shuji Suzuki

Makoto Nishio

Takahiro Numai

Masahiko Fujiwara

Masaki Itoh

S Murata

Naoki Shimosaka
title: A photonic wavelength division switching system using tunable laser diode filters
year: 1990

abstract: A photonic wavelength division switching system using semiconductor tunable wavelength filters is proposed. Wavelength switches and multistage switching networks are used. The potential of 100 wavelength division channel achievement in switching systems is estimated, based on InP optical integrated circuits. A wavelength network synchronization method is proposed, which will enable the network to utilize such a large number of wavelength division channels without wavelength misalignment and drift. An eight channel wavelength division switching experiment, using phase shift controlled distributed feedback laser diodes as tunable wavelength filters, is reported.<ETX>
author_names: Shuji Suzuki

Makoto Nishio

Takahiro Numai

Masahiko Fujiwara

Masaki Itoh

S Murata

Naoki Shimosaka
title: A photonic wavelength division switching system using tunable laser diode filters
venue: IEEE International Conference on Communications, World Prosperity Through Communications,
year: 1989

abstract: OTHER PUBLICATIONS Broeke et al. "Monolithical integration of semiconductor optical amplifiers and passive mode filters fro low facet reflectivity" 2001 IEEE/LEOS Symposium Benelux Chapter. Dec. 3, 2001. S. D. DeMars, A. Schoenfelder, V. Wong, and R. J. Lang, "Optical Properties of Angled Grating Distributed Feedback Lasers." IEEE 16th ISLC Conference Digest, 1998, pp. 57 58. V. N. Gulgazov, H. Zhao, D. Nam, J. S. Major, and T. L. Koch "Tunable high power AlGaAs distributed Bragg reflector Laser diodes" Electron. Lett. 1997, 33, (1) pp. 58 59. (Continued) Primary Examiner Armando Rodriguez (74) Attorney, Agent, or Firm Allen, Dyer, Doppelt, Milbrath Gilchrist, P.A.
author_names: John S Major

S O'brien

V Gulgazov

Dave Welch

Robert J Lang

Victor V Rossin

Erik P Zucker

Matthew G Peters

Matthew Everett

Bruno D Acklin
title: SINGLE SPATAL MODE OUTPUT MULT MODE INTERFERENCE LASER DODE WITH EXTERNAL CAVITY
year: 2017

abstract: Over the past 20 years, research into Gallium Nitride (GaN) has evolved from LED lighting to Laser Diodes (LDs) with applications ranging from quantum to medical and into communications. Previously, off the shelf GaN LDs have been reported with a view on free space and underwater communications. However, there are applications where the ability to select a single emitted wavelength is highly desirable, namely in atomic clocks or in filtered free space communications systems. To accomplish this, Distributed Feedback (DFB) geometries are utilised. Due to the complexity of overgrowth steps for buried gratings in III Nitride material systems, GaN DFBs have a grating etched into the sidewall to ensure single mode operation, with wavelengths ranging from 405nm to 435nm achieved. The main motivation in developing these devices is for the cooling of strontium ions (Sr+ in atomic clock applications, but their feasibility for optical communications have also been investigated. Data transmission rates exceeding 1 Gbit/s have been observed in unfiltered systems, and work is currently ongoing to examine their viability for filtered communications. Ultimately, transmission through Wavelength Division Multiplexing (WDM) or Orthogonal Frequency Division Multiplexing (OFDM) is desired, to ensure that data is communicated more coherently and efficiently. We present results on the characterisation of GaN DFBs, and demonstrate their capability for use in filtered optical communications systems.
author_names: Steffan Gwyn

Scott Watson

Shaun Viola

Giovanni Giuliano

Thomas J Slight

Szymon Stanczyk

Szymon Grzanka

Amit Yadav

Kevin E Docherty

Edik U Rafailov

Piotr Perlin

Stephen P Najda

Mike Leszczynski

Anthony E Kelly
title: GaN based distributed feedback laser diodes for optical communications
venue: Fourth International Conference on Applications of Optics and Photonics
year: 2019

abstract: In this paper, the amplified spontaneous emission (ASE) intensity of a distributed feedback laser diode (DFB LD) amplified by a semiconductor optical amplifier (SOA) is calculated, and the signal to spontaneous emission ratio (SSER) is investigated assuming a wavelength tunable laser. Based on a formulization appropriate for an active layer under a low excitation, the theoretical limit of the SSER of the SOA is obtained, and the SSER including the ASEs from both the DFB LD and the SOA is numerically calculated. The side mode suppression ratio (SMSR) taking the spectral distribution into consideration is also calculated by expanding the same method.
author_names: Kazuaki Kiyota
title: Theoretical Calculation of Amplified Spontaneous Emission in a Distributed Feedback Laser Diode Assisted by a Semiconductor Optical Amplifier
venue: IEEE Journal of Quantum Electronics
year: 2020

abstract: A novel widely tunable single passband microwave photonic filter (MPF) is proposed and experimentally demonstrated, which is based on a carrier suppressed double sidebands (CS DSB) optical signal injected into an distributed feedback (DFB) laser. A polarization modulator (PolM) and a polarization beam splitter (PBS) are exploited to generate the CS DSB optical signal. When the CS DSB optical signal is injected into the DFB laser, due to the frequency selective gain feature of optical injected DFB laser, one sideband of the CS DSB optical signal is selected and amplified. Beating the amplified sideband with the optical carrier, the gain spectrum of the DFB laser is mapped to the frequency response of the MPF. The MPF can be tuned by adjusting the wavelength of the DFB laser. Experiment results show that the MPF can be tuned from 0 to 40 GHz by changing the working temperature of the DFB laser.
author_names: Yuandong Li

Jiling Zheng

Peng Xiang

Huatao Zhu

Zhou Hua

Tao Pu

Zhouming Feng

Meng Hu

Yuan Liu
title: Single passband microwave photonic filter with widely tuning range based on optical injected distributed feedback semiconductor laser
venue: Optical Review
year: 2019

abstract: We investigate integrated mode locked laser diodes with distributed Bragg reflectors fabricated in the JePPIX Oclaro indium phosphide photonics platform. The optical and radio frequency (RF) characteristics of passively mode locked lasers with and without monolithically integrated feedback cavities were measured and compared. The RF linewidth of the mode locked laser could be reduced by integrating an optical feedback cavity of a particular length and a tunable magnitude of feedback. A maximum linewidth reduction factor of 1.9 was observed near the onset of mode locking, but increasing the laser optical power tended to lead to unstable operation. Increasing the drive current of the design without feedback also reduced the RF linewidth. A reduction factor of 7.6 was observed.
author_names: Torrey Thiessen

Joyce K S Poon
title: 20 GHz Mode Locked Laser Diodes With Integrated Optical Feedback Cavities in a Generic Monolithic InP Photonics Platform
venue: IEEE Photonics Journal
year: 2017

abstract: This paper demonstrates the interrogation of a fiber Bragg grating with a flat topped reflection spectrum centred on 1649.55 nm using only a single mode tunable 1651.93 nm semiconductor laser and a fiber ring resonator. The Bragg shift is accurately measured with the fiber optic ring resonator that has a free spectral range (FSR) of 0.1008 GHz and a broadband photo detector. Laser wavelength modulation and harmonic detection are used to transform the gentle edges of the flat topped FBG spectrum into prominent leading and trailing peaks, either of which can be used to accurately measure spectral shifts of the FBG reflection spectrum with a resolution of 0.9 pm. A Raspberry Pi based low cost embedded processor is used to measure the temperature induced spectral shifts over the range 30degC 80degC. The shift was linear with a temperature sensitivity of 12.8 pm/degC. This technique does not use an optical spectrum analyzer at any stage of its design or operation. The laser does not need to be pre characterized either. This technique can be readily extended to all types of tunable diode lasers and is ideally suited for compact field instruments.
author_names: Anirban Roy

Arup Lal Chakraborty

Chandan Kumar Jha
title: Fiber Bragg grating interrogation using a wavelength modulated 1651 nm tunable distributed feedback laser and a fiber ring resonator for wearable biomedical sensors
venue: 2017 25th Optical Fiber Sensors Conference (OFS)
year: 2017

abstract: We report on the modeling, growth, processing, characterization and integration in a gas detection setup of side wall corrugated distributed feed back antimonide diode lasers emitting at 2.28 and 2.67 mm. The laser structures were grown by molecular beam epitaxy on GaSb substrate. Ridge lasers were fabricated from the grown wafers according to the following process: a second order Bragg grating was defined on the sides of the ridges by interferometric lithography, optical lithography and etched in a Cl based inductively coupled plasma reactor. The devices exhibit a power reaching 40 mW, a side mode suppression ratio better than 28 dB and a tuning range of 3 nm at room temperature. One of these devices was successfully integrated in a tunable diode laser absorption spectroscopy setup, thus demonstrating that they are suitable for gas analysis.
author_names: Quentin Gaimard

Alexandre Larrue

Meriam Triki

Brice Adelin

Tong Nguyen-ba

Yves Rouillard

Olivier Gauthier-Lafaye

R Teissier

Aurore Vicet
title: 2.2 2.7 mm side wall corrugated index coupled distributed feedback GaSb based laser diodes
year: 2015