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介绍了一种新型实用的半导体激光稳频系统,主要包括精密控温电路、精密控流电路和激光稳频电路。对电路原理进行了讨论,给出了具体的参考电路和测量结果。结果表明控温电路的控制精度达到1 mK,使得由于温度影响导致的频率漂移小于3.8 MHz,控流电路的控制精度为1μA,使得由于电流抖动引起的频率抖动小于1 MHz,控温、控流电路与稳频电路组成的半导体激光稳频系统能够很好地将频率稳定于原子跃迁线上。所设计的稳频系统精度高、调节方便,可用于激光精密长度测量、化学精密检测和激光冷却等。
A new and practical semiconductor laser frequency stabilization system is introduced, including precision temperature control circuit, precision flow control circuit and laser frequency stabilization circuit. The circuit principle is discussed, given the specific reference circuit and measurement results. The results show that the control accuracy of the temperature control circuit reaches 1 mK, so that the frequency drift due to temperature is less than 3.8 MHz and the control precision of the current control circuit is 1 μA, so the frequency jitter caused by current jitter is less than 1 MHz. The semiconductor laser frequency stabilization system composed of the circuit and the frequency stabilization circuit can well stabilize the frequency on the atomic transition line. The designed frequency stabilization system has the advantages of high precision and convenient adjustment, and can be used for laser precision length measurement, chemical precision detection and laser cooling.