Angled facet waveguide quantum cascade laser for external cavity system

Yohei Matsuoka; Sylvain Mathonnière; Mykhaylo P. Semtsiv; W. Ted Masselink

doi:10.1117/12.2290149

19 February 2018 Angled facet waveguide quantum cascade laser for external cavity system

Yohei Matsuoka, Sylvain Mathonnière, Mykhaylo P. Semtsiv, W. Ted Masselink

Proceedings Volume 10553, Novel In-Plane Semiconductor Lasers XVII; 105531L (2018) https://doi.org/10.1117/12.2290149
Event: SPIE OPTO, 2018, San Francisco, California, United States

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.

Citation Download Citation

Yohei Matsuoka, Sylvain Mathonnière, Mykhaylo P. Semtsiv, and W. Ted Masselink "Angled facet waveguide quantum cascade laser for external cavity system", Proc. SPIE 10553, Novel In-Plane Semiconductor Lasers XVII, 105531L (19 February 2018); https://doi.org/10.1117/12.2290149

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