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激光二极管(LD)抽运的固体激光器(DPSSL)的调Q器件是获得高重复频率、高峰值功率的有效手段之一,随着激光雷达、激光加工业的发展,要求调Q器件向着更高重复频率的方向发展。Nd∶GdVO4以其优异的物理和激光特性,使得它在激光二极管端面抽运固体激光器的声-光(A-O)调Q器件中,即使在很高的调制重复频率下,仍可获得窄脉宽、高峰值功率的脉冲激光输出。理论分析了影响脉冲激光的输出能量和脉宽大小的决定因素,研究了脉宽、平均输出功率及峰值功率随调Q重复频率的变化关系。利用双激光二极管双端抽运Nd∶GdVO4晶体棒,实现了声-光调Q高重复频率窄脉宽1063 nm激光输出。在晶体入射端面总抽运功率约43 W条件下,当重复频率f=10 kHz时,获得脉宽Δt=10.2 ns,单脉冲能量E=0.95 mJ,峰值功率PM=93.1 kW的输出;在重复频率f=100 kHz时,获得Δt=28.1 ns,E=0.10 mJ,PM=3.6 kW的结果。
The Q-switched device of laser diode (LD) pumping solid-state laser (DPSSL) is one of the effective methods to obtain high repetition rate and high peak power. With the development of laser radar and laser processing industry, Repeat the direction of frequency. Nd: GdVO4 with its excellent physical and laser properties makes it possible to achieve narrow pulse widths even at very high modulation repetition rates in acousto-optic (AO) Q-switched devices with laser diode end-pumped solid state lasers , High peak power pulsed laser output. The determinants of the output energy and the pulse width of the pulsed laser are analyzed theoretically. The relationship between the pulse width, the average output power and the peak power with the Q repetition frequency is studied. The Nd: GdVO4 crystal rod was pumped by a double laser diode, which realized the narrow pulse width 1063 nm laser output with high repetition rate and high Q-switching. The pulse width Δt = 10.2 ns, single-pulse energy E = 0.95 mJ and peak power PM = 93.1 kW were obtained at a repetition rate of f = 10 kHz at a total pumping power of about 43 W at the entrance end of the crystal. At a frequency f = 100 kHz a result of Δt = 28.1 ns, E = 0.10 mJ, PM = 3.6 kW was obtained.