Open AccessGrating-based far field modifications of ring quantum cascade lasers
Author(s) -
Rolf Szedlak,
Clemens Schwarzer,
Tobias Zederbauer,
Hermann Detz,
A. M. Andrews,
W. Schrenk,
G. Strasser
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.015829
Subject(s) - grating , optics , cascade , blazed grating , physics , diffraction grating , laser , quantum cascade laser , beam (structure) , near and far field , optoelectronics , chemistry , chromatography
We present methods for beam modifications of ring quantum cascade lasers emitting around λ = 9μm, which are based on novel distributed feedback grating designs. This includes the creation of a rotationally symmetric far field with a central intensity maximum using an off-center grating as well as the generation of partial radially polarized emission beams induced by a rotation of the grating slits.