Photonic crystal spatial filtering in broad aperture diode laser
Optics
2019-10-23 v2
Abstract
Broad aperture semiconductor lasers usually suffer from low spatial quality of the emitted beams. Due to the highly compact character of such lasers the use of a conventional intra-cavity spatial filters is problematic. We demonstrate that extremely compact Photonic Crystal spatial filters, incorporated into the laser resonator, can improve the beam spatial quality, and correspondingly, increase the brightness of the emitted radiation. We report the decrease of the M2 from 47 down to 28 due to Photonic Crystal spatial intra-cavity filtering, and the increase of the brightness by a factor of 1.5, giving a proof of principle of intra-cavity Photonic Crystal spatial filtering in broad area semiconductor lasers.
Cite
@article{arxiv.1906.05242,
title = {Photonic crystal spatial filtering in broad aperture diode laser},
author = {Sandeep Gawali and Darius Gailevičius and Guillermo Gerre-Werner and Vytautas Purlys and Crina Cojocaru and Jose Trull and Joan Montiel-Ponsoda and Kestutis Staliunas},
journal= {arXiv preprint arXiv:1906.05242},
year = {2019}
}