Power stabilization of a diode laser with an acousto-optic modulator.
Power stabilization of a diode laser with an acousto-optic modulator.
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DOI：
10.1063/1.5046852
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发表时间：
2018-08
期刊：
影响因子：
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通讯作者：
F. Tricot;D. Phung;M. Lours;S. Guérandel;E. Clercq
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文献类型：
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作者：
F. Tricot;D. Phung;M. Lours;S. Guérandel;E. Clercq
激光功率波动会显著降低各种应用中的器件性能。高频波动会影响信噪比，而缓慢的变化会降低设备的可重复性或准确性。本文报道了用声光调制器稳定半导体激光器功率的实验研究。在频域中，相对功率噪声在1-100 kHz范围内降低到2.2 × 10-8 Hz-1/2的水平。在时域中研究了慢变化。在100 s平均时间下测得相对Allan标准偏差为6 × 10-7。在100 s以上，不稳定性增大，在10 000 s时达到2 × 10-6。
Laser power fluctuations can significantly reduce the device performances in various applications. High frequency fluctuations impact the signal-to-noise ratio, while slow variations can reduce the device repeatability or accuracy. Here we report experimental investigations on the power stabilization of a diode laser with an acousto-optic modulator. In the frequency domain, the relative power noise is reduced at the level of 2.2 × 10-8 Hz-1/2 in the range 1-100 kHz. The slow variations are studied in the time domain. The relative Allan standard deviation is measured at the level of 6 × 10-7 at 100 s averaging time. Above 100 s, the instability increases and reaches 2 × 10-6 at 10 000 s.