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.

中文翻译：

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用于多共轭自适应光学系统的高重复频率100 W功率钠信标激光器

据我们所知，通过结合两个独立的μs脉冲激光器，首次展示了功率为589 nm的千赫兹重复频率微秒（µs）脉冲全固态钠信标激光器。每个子束通过和频在三硼酸锂（LBO）晶体，将其在500赫兹的脉冲重复频率与61 w ^操作脉冲1064个1319 nm激光的混合产生的$ P $偏振光和53 w ^ $ S $偏振光输出。偏振激光束的非相干序列组合技术用于将两个小束相加。组合光束的平均功率高达107.5 W，组合效率为94.3％。合并后的波束的重复频率为1 kHz，其中$ {\ sim} {120} \; \ unicode {x00B5} {\ rm s} $脉冲持续时间和光束质量$ {M ^ 2} = {1.41} $。线宽为$ {\ sim} {0.3} \; {\ rm GHz} $的中心波长被锁定到钠$ {{\ rm D} _ {2a}} $的吸收线上。据我们所知，这是用于μs脉冲固态钠信标激光器的创纪录的高功率，工作频率为千赫兹。