Directional single mode QCL emission using metal grating second order coupler at room temperature

G Maisons,Mathieu Carras,Marcelo H Garcia,B Simozrag,Xavier Marcadet

Semiconductor Laser Conference（2010）

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Abstract

Low beam divergence (2.1°*4°) substrate emission from a quantum cascade laser is demonstrated with top metal grating at room temperature. An index coupled, distributed feedback laser with a SMSR of 30dB is coupled to a monolithic extraction area.

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Key words

diffraction gratings,distributed feedback lasers,optical couplers,quantum cascade lasers,directional single mode quantum cascade laser emission,distributed feedback laser,low beam divergence substrate emission,metal grating second order coupler,surface emission,low divergence,quantum cascade laser,top metal grating,room temperature,single mode,second order,indexation,metals

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