Title :
Theoretical Investigation of Striped and Non-Striped Broad Area Lasers With Off-Axis Feedback
Author :
Lichtner, Mark ; Tronciu, Vasile Z. ; Vladimirov, Andrei G.
Author_Institution :
Dept. of Laser Dynamics, Weierstrass Inst. for Appl. Anal. & Stochastics, Berlin, Germany
fDate :
3/1/2012 12:00:00 AM
Abstract :
We report a method to improve the beam quality of broad area lasers by using a V-shaped external cavity formed by two off-axis feedback mirrors that allow to select a single transverse mode with transversally modulated intensity distribution. In the case when one of the two feedback mirrors is absent a spontaneous formation of self-induced transverse population grating leading to a reduction of the lasing threshold is observed. Most favorable conditions for stabilization of a single transverse supermode and creation of a high power and high brightness plane wave traveling in the extended cavity are obtained for equal reflectivities of the two external reflectors.
Keywords :
diffraction gratings; laser beams; laser cavity resonators; laser feedback; laser mirrors; laser modes; semiconductor laser arrays; V-shaped external cavity; beam quality; external reflector; lasing threshold; nonstriped broad area laser; off axis feedback mirror; self induced transverse population grating; single transverse mode; transversally modulated intensity distribution; Arrays; Cavity resonators; Gratings; Laser feedback; Laser modes; Mathematical model; Mirrors; Broad area semiconductor laser; off-axis feedback; supermode;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2011.2177961
