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首页> 外文期刊>Applied optics >Fiber-solid, hybrid, single-frequency laser (100 W) with a 100 MHz repetition rate and 1 ns pulse width from a spherical aberration compensated four-stage Nd:YVO_4 amplifier
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Fiber-solid, hybrid, single-frequency laser (100 W) with a 100 MHz repetition rate and 1 ns pulse width from a spherical aberration compensated four-stage Nd:YVO_4 amplifier

机译：球面像差补偿四级Nd：YVO_4放大器的光纤固体混合单频激光器（100 W），重复频率为100 MHz，脉冲宽度为1 ns

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摘要

A pulsed laser for laser guide stars with a 100 MHz repetition rate and 1 ns pulse width was achieved by external modulation of a continuous wave (CW) laser with a 70 kHz spectrum width. The laser is amplified first by two fiber pre-amplifiers and then by four solid-state power amplifiers. The laser achieves gains as high as 36 dB in the fiber pre-amplifiers due to the long gain medium length. The output power from the fiber amplifiers is 2.1 W. The laser receives further amplification in the solid-state amplifiers and retains good beam quality by aberration compensation. The final output average power is 102.9 W, and the beam quality factor M~2 is 1.46. The laser reaches high power without spectrum width and pulse width broadening at the 100 MHz repetition rate. The spectrum width of the pulsed laser is less than 0.8 GHz, which is close to the Fourier transform limit. Such a laser with single-frequency, high-repetition, and high-power features along with good beam quality will be valuable for many research areas.
机译：通过外部调制具有70 kHz光谱宽度的连续波（CW）激光器，可以得到具有100 MHz重复频率和1 ns脉冲宽度的激光制导星脉冲激光。激光首先被两个光纤前置放大器放大，然后被四个固态功率放大器放大。由于增益介质长度长，激光在光纤前置放大器中的增益高达36 dB。光纤放大器的输出功率为2.1W。激光在固态放大器中得到进一步放大，并通过像差补偿保持良好的光束质量。最终输出平均功率为102.9 W，光束质量因数M〜2为1.46。激光达到了高功率，而频谱宽度和脉冲宽度都没有以100 MHz的重复速率展宽。脉冲激光器的光谱宽度小于0.8 GHz，接近傅里叶变换极限。具有单频，高重复和高功率特性以及良好光束质量的这种激光器对于许多研究领域来说都是有价值的。

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