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Passively mode-locked interband cascade lasers (Conference Presentation)
Author(s): Mahmood Bagheri; Clifford Frez; Igor Vurgaftman; Jonas Westberg; Lukasz A. Sterczewski; Mathieu Fradet; Ivan Grudinin; Chad L. Canedy; William W. Bewley; Chulsoo Kim; Charles D. Merritt; Jerry R. Meyer; Gerard Wysocki
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Paper Abstract

Recently, significant progress has been made in improving the efficiency of interband cascade laser (ICL) structures emitting between 3 and 6 μm. Historically, much attention has been devoted to the development of single mode distributed feedback (DFB) ICLs with high spectral purity and high wall plug efficiency for tunable diode laser spectroscopy (TDLAS). However, an interesting alternative to TDLAS is to take advantage of a broad, coherent highly-multimode optical source, an optical frequency comb, that enables multi-species detection and fast molecular fingerprinting to be performed with high sensitivity. In this regard, an electrically-pumped mode-locked optical frequency comb is an enabling technology for the next generation of spectroscopic chemical sensor systems. Here, we will report the first demonstration of a passively mode-locked ICL that operates efficiently in the 3.6 μm wavelength range. Passive mode locking is achieved in a saturable-absorber (SA) architecture, in which the split top contact is divided into a longer, forward-biased gain section and a shorter SA section. We will report ICL based frequency combs with 1 THz of optical bandwidth and power consumption less than 1.5 W. Prospects for broadening the emission bandwidth will be discussed, and some preliminary spectroscopic measurements presented.

Paper Details

Date Published: 13 March 2019
Proc. SPIE 10939, Novel In-Plane Semiconductor Lasers XVIII, 1093919 (13 March 2019); doi: 10.1117/12.2510060
Show Author Affiliations
Mahmood Bagheri, Jet Propulsion Lab. (United States)
Clifford Frez, Jet Propulsion Lab. (United States)
Igor Vurgaftman, U.S. Naval Research Lab. (United States)
Jonas Westberg, Princeton Univ. (United States)
Lukasz A. Sterczewski, Princeton Univ. (United States)
Mathieu Fradet, Jet Propulsion Lab. (United States)
Ivan Grudinin, Jet Propulsion Lab. (United States)
Chad L. Canedy, U.S. Naval Research Lab. (United States)
William W. Bewley, U.S. Naval Research Lab. (United States)
Chulsoo Kim, U.S. Naval Research Lab. (United States)
Charles D. Merritt, U.S. Naval Research Lab. (United States)
Jerry R. Meyer, U.S. Naval Research Lab. (United States)
Gerard Wysocki, Princeton Univ. (United States)

Published in SPIE Proceedings Vol. 10939:
Novel In-Plane Semiconductor Lasers XVIII
Alexey A. Belyanin; Peter M. Smowton, Editor(s)

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