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Passively Q-switched Nd:YAG ceramic microchip laser with azimuthally polarized output

โœ Scribed by J.-L. Li; D. Lin; L.-X. Zhong; K. Ueda; A. Shirakawa; M. Musha; W.-B. Chen

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
201 KB
Volume
6
Category
Article
ISSN
1612-2011

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โœฆ Synopsis

A passively-Q-switched neodymium-doped yttrium aluminum garnet (Nd:YAG) ceramic microchip laser was demonstrated to emit azimuthally polarized beam bus using a chromium-doped YAG (Cr 4+ :YAG) crystal as saturable absorber and a multilayer concentric subwavelength grating as polarization-selective output coupler. The laser's output power reached 512 mW with an initial slope efficiency of nearly 60%, and the pulse had 1.15-kW peak power with 40-ns duration and 11-kHz repetition rate at 3.9-W absorbed pump power. The laser beam's polarization degree was 97.6%. The thermal lensing effect in Nd:YAG microchip remained as a problem to be solved.

Averaged output power, mW

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