High-power narrow-linewidth QCW diode-pumped TEM00 1319 nm Nd:YAG oscillator using twisted-mode technique

We demonstrated a high-average-power, narrow-linewidth, quasi-continuous-wave diode-side-pumped 1319 nm Nd:YAG twisted-mode laser oscillator with a linearly polarized TEM00 mode. The resonator is based on a symmetrical convex-convex structure with a two-rod configuration for birefringence compensati...

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Bibliographic Details
Published in:Laser physics letters 2017-06, Vol.14 (6)
Main Authors: Bian, Qi, Zhong, Qing-Shuang, Chang, Jin-Quan, Guo, Chuan, Bo, Yong, Zuo, Jun-Wei, Shen, Yu, Zong, Nan, Zhang, Shen-Jin, Yuan, Lei, Cui, Da-Fu, Peng, Qin-Jun, Chen, Hong-Bin, Xu, Zu-Yan
Format: Article
Language:English
Subjects:
brightness
high power
narrow-linewidth
pulse Nd:YAG laser
twisted-mode laser
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Summary:We demonstrated a high-average-power, narrow-linewidth, quasi-continuous-wave diode-side-pumped 1319 nm Nd:YAG twisted-mode laser oscillator with a linearly polarized TEM00 mode. The resonator is based on a symmetrical convex-convex structure with a two-rod configuration for birefringence compensation, working in a thermally near-unstable cavity. With an optimum cavity length of 940 mm, a 39.4 W linear polarized 1319 nm laser is obtained with a good beam quality of M2  =  1.21 and a linewidth of ~250 MHz, and the corresponding brightness is as high as 1.55 GW cm−2. The laser is operated at a repetition rate of 500 Hz and pulse duration of 150 µs. To the best of our knowledge, this is the highest output power 1319 nm laser with narrow-linewidth from diode-pumped Nd:YAG lasers, and is the first report on the twisted-mode laser operation at the 1.3 µm region.
ISSN:1612-2011
1612-202X
DOI:10.1088/1612-202X/aa6b36