Abstract
A 100 W level kilohertz repetition-rate microsecond (µs)-pulse all-solid-state sodium beacon laser at 589 nm is demonstrated for the first time, to the best of our knowledge, via combining two independent µs-pulsed lasers. Each beamlet is generated by the sum-frequency mixing of pulsed 1064 and 1319 nm lasers in a lithium triborate (LBO) crystal, which operate at 500 Hz pulse repetition frequency with 61 W $p$-polarized and 53 W $s$-polarized output, respectively. An incoherent sequence combining technology of polarized laser beams is employed to add the two beamlets. The average power of the combined beam is up to 107.5 W with a combining efficiency of 94.3%. The combined beam has a 1 kHz repetition rate with ${\sim}{120}\;\unicode{x00B5} {\rm s}$ pulse duration and beam quality ${M^2} = {1.41}$. The central wavelength with a linewidth of ${\sim}{0.3}\;{\rm GHz}$ is locked to a sodium ${{\rm D}_{2a}}$ absorption line. To the best of our knowledge, this is a record-high power operating at kilohertz for µs-pulsed solid-state sodium beacon lasers.
© 2020 Optical Society of America
Full Article | PDF ArticleMore Like This
Qi Bian, Yong Bo, Jun-wei Zuo, Lei Yuan, Hong-bin Chen, Qin-jun Peng, and Zu-yan Xu
Opt. Express 28(9) 13895-13906 (2020)
Qi Bian, Yong Bo, Jun-wei Zuo, Chuan Guo, Chang Xu, Wei Tu, Yu Shen, Nan Zong, Lei Yuan, Hong-wei Gao, Qin-jun Peng, Hong-bin Chen, Lu Feng, Kai Jin, Kai Wei, Da-fu Cui, Sui-jian Xue, Yu-dong Zhang, and Zu-yan Xu
Opt. Lett. 41(8) 1732-1735 (2016)
Xuezong Yang, Ondrej Kitzler, David J. Spence, Zhenxu Bai, Yan Feng, and Richard P. Mildren
Opt. Lett. 45(7) 1898-1901 (2020)