Dynamic Device Characteristics and Linewidth Measurement of InGaN/GaN Laser Diodes


We report on the characterization and analysis of a GaN-based distributed feedback laser diode (DFB-LD) with 3 rd-order laterally etched sidewall gratings centered at a wavelength of 420 nm. We also compare the device parameters with two commonly used Fabry-Perot (FP) devices operating at 450 nm and 520 nm. Intrinsic properties of the devices were extracted, including damping factor, carrier and photon lifetimes, modulation efficiency, differential gain, and parasitic capacitance. These parameters showed that the DFB exhibits a lower damping rate and parasitic capacitance while demonstrating a higher modulation efficiency, indicating that the DFB shows good potential for communications applications. Additionally, spectral linewidth of a GaN DFB is reported. To the authors' knowledge, this is the first demonstration of parameter extraction and spectral linewidth measurement for GaN-based DFB-LDs.

Publication DOI: https://doi.org/10.1109/JPHOT.2020.3045218
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/ Funding: This research has been supported by the European Union with grant E113162, Innovate UK through grant 132543, the National Centre for Research and Development with grant E113162/NCBiR/2020, and the Engineering and Physical Sciences Research Council (RCUK Grant no. EP/L015323/1)
Uncontrolled Keywords: Bandwidth,distributed feedback laser diode,Frequency response,Gallium Nitride,Gallium nitride,Gratings,Modulation,optical communications,Photonics,Resonant frequency,Atomic and Molecular Physics, and Optics,Electrical and Electronic Engineering
Publication ISSN: 1943-0655
Last Modified: 28 May 2024 07:19
Date Deposited: 17 Dec 2020 08:18
Full Text Link:
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2021-02-01
Published Online Date: 2020-12-16
Accepted Date: 2020-12-01
Authors: Gwyn, Steffan
Watson, Scott
Slight, Thomas James
Knapp, Martin
Viola, Shaun
Ivanov, Pavlo
Zhang, Weikang
Yadav, Amit (ORCID Profile 0000-0001-7865-6905)
Rafailov, Edik U. (ORCID Profile 0000-0002-4152-0120)
Haji, Mohsin
Docherty, Kevin Edward
Stanczyk, Szymon
Grzanka, Szymon
Perlin, Piotr
Najda, Stephen
Leszczynksi, Mike
Kelly, Anthony



Version: Published Version

License: Creative Commons Attribution

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