High-power narrow-linewidth QCW diode-pumped TEM00 1319 nm Nd:YAG oscillator using twisted-mode technique. (20th April 2017)

• Record Type: Journal Article
• 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
• Is Part Of: Laser physics letters. Volume 14:Number 6(2017:Jun.)
• Publication Date: 2017-04-20
• Subjects: pulse Nd:YAG laser -- brightness -- narrow-linewidth -- high power -- twisted-mode laser; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/aa6b36
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: 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 M 2 = 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 µ s. 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 µ m region.