Recent progress in distributed feedback InGaN/GaN laser diodes

Abstract

Laser diodes based on Gallium Nitride (GaN) are useful devices in a wide range of applications including atomic spectroscopy, data storage and optical communications. To fully exploit some of these application areas there is a need for a GaN laser diode with high spectral purity, e.g. in atomic clocks, where a narrow linewidth blue laser source can be used to target the atomic cooling transition. We report on the continuous wave, room temperature operation of a distributed feedback laser diode (DFB-LD) with high-order notched gratings. The design, fabrication and characterization of DFB devices based on the (Al,In) GaN material system is described. A single peak emission at 408.6 nm with an optical power of 20 mW at 225 mA and a side mode suppression ratio (SMSR) of 35 dB was achieved. Additionally, we demonstrate the use of a GaN DFB-LD as a transmitter in visible optical communications system. We also present results from a DFB-LD optimized for laser cooling of Sr+.

Publication DOI: https://doi.org/10.1117/12.2507630
Divisions: Engineering & Applied Sciences > Aston Institute of Photonics Technology
Engineering & Applied Sciences
Additional Information: Copyright 2019 SPIE. One print or electronic copy may be made for personal use only. Systematic reproduction, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Uncontrolled Keywords: Distributed feedback laser diodes,GaN,Laser cooling,Lateral grating,Notched grating,Optical communications,Semiconductor lasers,Sidewall grating,Electronic, Optical and Magnetic Materials,Condensed Matter Physics,Computer Science Applications,Applied Mathematics,Electrical and Electronic Engineering
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Conference article
Published Date: 2019-03-01
Accepted Date: 2019-01-09
Authors: Slight, Thomas J.
Watson, Scott
Viola, Shaun
Yadav, Amit
Stanczyk, Szymon
Grzanka, Szymon
Gwyn, Steffan
Rafailov, Edik ( 0000-0002-4152-0120)
Perlin, Piotr
Najda, Stephen P.
Leszczyński, Mike
Haji, Mohsin
Kelly, Anthony E.

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