Single-mode 2.4um InGaAsSb/AlGaAsSb distributed feedback lasers for gas sensing

James A. Gupta; Pedro J. Barrios; Jean Lapointe; Geof C. Aers; Daniel Poitras; Craig Storey; Philip Waldron

doi:10.1117/12.817849

26 January 2009 Single-mode 2.4μm InGaAsSb/AlGaAsSb distributed feedback lasers for gas sensing

James A. Gupta, Pedro J. Barrios, Jean Lapointe, Geof C. Aers, Daniel Poitras, Craig Storey, Philip Waldron

Proceedings Volume 7222, Quantum Sensing and Nanophotonic Devices VI; 72220A (2009) https://doi.org/10.1117/12.817849
Event: SPIE OPTO: Integrated Optoelectronic Devices, 2009, San Jose, California, United States

Abstract

Single-mode laser diodes on GaSb substrates were developed using InGaAsSb/AlGaAsSb triple quantum well active regions grown by molecular beam epitaxy. The devices were fabricated using lateral Cr gratings, with a grating pitch designed to coincide with a strong absorption feature of HF gas, deposited adjacent to a dry-etched narrow ridge waveguide. High sidemode suppression was achieved, and in 20°C continuous-wave operation, devices with a 400μm-long cavity provided 4.5mW total output power at the 2396nm target wavelength. Anti-reflection and high-reflection facet coatings exhibited no deleterious effects on the laser tunability or mode quality, thus allowing the preferential extraction of output power from a single laser facet.

Citation Download Citation

James A. Gupta, Pedro J. Barrios, Jean Lapointe, Geof C. Aers, Daniel Poitras, Craig Storey, and Philip Waldron "Single-mode 2.4μm InGaAsSb/AlGaAsSb distributed feedback lasers for gas sensing", Proc. SPIE 7222, Quantum Sensing and Nanophotonic Devices VI, 72220A (26 January 2009); https://doi.org/10.1117/12.817849

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