High-power spiral cavity quantum cascade superluminescent emitters with a passive loop back facet

Mei C. Zheng; Yezhezi M. Zhang; Peter Q. Liu; Xiaojun Wang; Jen-Yu Fan; Mariano Troccoli; Claire F. Gmachl

doi:10.1117/1.OE.57.1.011001

19 August 2017 High-power spiral cavity quantum cascade superluminescent emitters with a passive loop back facet

Mei C. Zheng, Yezhezi M. Zhang, Peter Q. Liu, Xiaojun Wang, Jen-Yu Fan, Mariano Troccoli, Claire F. Gmachl

Author Affiliations +

Optical Engineering, Vol. 57, Issue 1, 011001 (August 2017). https://doi.org/10.1117/1.OE.57.1.011001

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.

Citation Download Citation

Mei C. Zheng, Yezhezi M. Zhang, Peter Q. Liu, Xiaojun Wang, Jen-Yu Fan, Mariano Troccoli, and Claire F. Gmachl "High-power spiral cavity quantum cascade superluminescent emitters with a passive loop back facet," Optical Engineering 57(1), 011001 (19 August 2017). https://doi.org/10.1117/1.OE.57.1.011001

Received: 19 May 2017; Accepted: 20 July 2017; Published: 19 August 2017

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