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Angled facet waveguide quantum cascade laser for external cavity system
Author(s): Yohei Matsuoka; Sylvain Mathonnière; Mykhaylo P. Semtsiv; W. Ted Masselink
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Paper Abstract

We describe the use of an angled facet to achieve low reflectance of one facet of a quantum cascade laser. A bent waveguide allows one facet to be angled with respect to the waveguide and still use the natural cleavage plane of the crystal. The application of such structures is external-cavity wavelength tunable quantum cascade lasers. The reflectance is studied as a function of angle with an angle of 11.2° reducing the reflectance from 28% to 3.5%. When combined with a dielectric anti-reflection coating, better external-cavity laser performance is possible.

Paper Details

Date Published: 19 February 2018
PDF: 6 pages
Proc. SPIE 10553, Novel In-Plane Semiconductor Lasers XVII, 105531L (19 February 2018); doi: 10.1117/12.2290149
Show Author Affiliations
Yohei Matsuoka, Humboldt-Univ. zu Berlin (Germany)
Sylvain Mathonnière, Humboldt-Univ. zu Berlin (Germany)
Mykhaylo P. Semtsiv, Humboldt-Univ. zu Berlin (Germany)
W. Ted Masselink, Humboldt-Univ. zu Berlin (Germany)

Published in SPIE Proceedings Vol. 10553:
Novel In-Plane Semiconductor Lasers XVII
Alexey A. Belyanin; Peter M. Smowton, Editor(s)

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