885nm-LD end-pumped burst-mode laser

An 885nm LD end-pumped burst-mode laser with high repetition frequency and low thermal effect is introduced in this paper. The laser can solve the problem of high repetition frequency and high energy in the traditional continuous pulse output mode, and can meet the requirements of light source of airborne lidar well. The laser adopts the main oscillating power amplification (MOPA) structure. The oscillating stage uses 885nmLD pulse pumped Nd:YAG crystal, which can reduce the thermal power consumption of the laser. The electro-optic Q-switch is used for intra-cavity modulation, and the output pulse train with a repetition frequency of 4Hz, each pulse train contains 60 sub-pulses with a repetition frequency of 1kHz.Finally, the fundamental frequency light with central wavelength of 1064nm, sub-pulse repetition frequency of 1kHz, single pulse energy of 6.1mJ and beam quality is obtained. In the amplification stage, 885nm end-pumped Nd: YAG crystal was used. After one-way amplification, the laser output with sub-pulse energy of 15.7mJ, pulse width of 12ns and beam quality was obtained.