[17p-B403-1~17] 3.5 Laser system and materials

[17p-B403-4] Demonstration of broadband multilayer anti-reflection coating on quantum cascade laser facet from 8.0 to 12.0 μm range

〇(D)Yohei Matsuoka¹, Sven Peter², Mykhaylo Semtsiv¹, W. Ted Masselink¹ (1.Humboldt Univ. of Berlin, 2.Sentech Instruments GmbH)

Keywords:quantum cascade laser, external cavity laser, anti-reflection coating for mid-infrared

The external cavity quantum cascade laser (EC-QCL) is quite attractive as a coherent light source for mid-infrared applications. For EC-QCLs, reducing the facet reflectivity is strongly required to improve the laser performance. We will present broadband mutillayer anti-reflection coating designed for a broad gain QCL facet, contributing the broader tunablity and higher output power.