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Optical Engineering

High-power spiral cavity quantum cascade superluminescent emitters with a passive loop back facet
Author(s): Mei C. Zheng; Yezhezi M. Zhang; Peter Q. Liu; Xiaojun Wang; Jen-Yu Fan; Mariano Troccoli; Claire F. Gmachl
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Paper Abstract

We report on the experimental demonstration of a high-power (<100  mW) quantum cascade superluminescent (SL) emitter employing a spiral cavity with a passive loop back facet. By replacing the rounded, wet-etched, antireflection coated back facet of a spiral cavity with a passive loop facet, the lasing action was suppressed (i.e., threshold current density increased) due to a decrease in the back facet reflectivity. This type of facet allowed us to achieve a twofold increase in the peak SL power by employing a 16-mm-long spiral cavity.

Paper Details

Date Published: 19 August 2017
PDF: 5 pages
Opt. Eng. 57(1) 011001 doi: 10.1117/1.OE.57.1.011001
Published in: Optical Engineering Volume 57, Issue 1
Show Author Affiliations
Mei C. Zheng, Princeton Univ. (United States)
Yezhezi M. Zhang, Princeton Univ. (United States)
Peter Q. Liu, Princeton Univ. (United States)
Univ. at Buffalo (United States)
Xiaojun Wang, AdTech Optics, Inc. (United States)
Jen-Yu Fan, AdTech Optics, Inc. (United States)
Mariano Troccoli, AdTech Optics, Inc. (United States)
Claire F. Gmachl, Princeton Univ. (United States)


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