Open AccessComparison of 115 µm Nd:YAG\KTA Raman lasers with 234 and 671 cm^−1 shifts
Author(s) -
Yanmin Duan,
Heyuan Zhu,
Hongyan Wang,
Yaoju Zhang,
Zhenqiang Chen
Publication year - 2016
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.24.005565
Subject(s) - raman spectroscopy , materials science , raman scattering , optics , laser , raman laser , coherent anti stokes raman spectroscopy , polarization (electrochemistry) , raman cooling , chemistry , physics
Nd:YAG/KTA intra-cavity Raman lasers with two different Raman shifts are experimentally compared for eradiating around 1.15 µm. The different Raman processes are attributed to polarization dependent Raman gain of KTA crystal and nearly linear polarization of Nd:YAG fundamental light with Q-switch operation. Under an incident pump power of 10.2 W and a pulse repetition frequency of 15 kHz, 1.24 W output for the third-Stokes at 1150 nm in X(ZZ)X Raman configuration with the Raman shifts of 234 cm -1 and 1.21 W output for the first-Stokes at 1146 nm in X(YY)X Raman configuration with the Raman shifts of 671 cm -1 were achieved by rotating the KTA crystal. The conversion efficiency in both Raman configurations were about 12% respect to the same incident pump power. The slight differences of spectra and pulses are investigated.