高脉冲重复频率调Q Tm,Ho:GdVO4激光器
Q-switched Tm, Ho:GdVO4 laser with high pulse repetition frequency
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摘要: 报道了一个高效率连续波和调Q高重频两种运行方式的Tm,Ho:GdVO4激光器。Tm,Ho:GdVO4晶体尺寸4 mm×4 mm×7 mm，a轴通光，液氮制冷到100 K，由发射中心波长为793 nm的光纤耦合激光二极管端面泵浦。Tm,Ho:GdVO4激光连续波输出功率4.0 W，光光转换效率26%。声光调Q条件下输出平均高功率3.9 W，脉冲重复频率10 kHz，脉冲宽度50 ns。 通过减小声光Q开关的开启时间，激光脉冲宽度由50 ns减小至23 ns。在10 kHz重频下，测量最大脉冲能量0.39 mJ , 峰值功率7.8 kW。Abstract: CW and Q-switched operation of Tm, Ho:GdVO4 laser is reported in this paper. The Tm,Ho:GdVO4 crystal is cooled by liquid nitrogen and end-pumped by a laser diode of 793nm. Output power of 4.0 W and optical-to-optical efficiency of 26% is achieved at CW mode. With acousto-optically Q-switched operation, an average power 3.9 W of at a pulse-repetition rate of 10 kHz with pulse duration of 50ns is obtained. The pulse width is tunable from 23 ns to 50 ns by changing rf(radio frequency) off-time of AO Q-switch. At a pulse-repetition rate of 10 kHz, 0.39 mJ of pulse energy, and 7.8 kW of peak power were measured
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Key words:
- diode laser /
- end-pump /
- ao q-switch /
- tm /
- ho:gdvo4
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