Author Affiliations
Abstract
Institute of Quantum Electronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
We propose, design, and realize a compact stabilized laser system that can be tuned within 24 GHz automatically. This laser system consists of two distributed feedback (DFB) lasers, one of which is reference and locked to the D2 line of Rb87, the other laser is a slave that is locked to the reference laser via a loop servo. We measured the frequency of the beating signal of the two lasers and generated an error signal, which controlled the frequency of the slave laser to close the loop. We compressed the fluctuation of the beating signal’s frequency to less than 1 MHz. Furthermore, the system can also automatically determine and control whether the slave is red detuned or blue detuned to the reference. The dimensions of our laser system are about 15 cm × 20 cm × 10 cm. This kind of laser system can be applied in many important applications, such as atomic interferometer and cold atomic clock.
140.2020 Diode lasers 140.3425 Laser stabilization Chinese Optics Letters
2018, 16(3): 031403
设计并实现了一种低功耗、小型化、可长期稳定运行的自动稳频激光系统。通过设计并实现高效率、低纹波的电压源，较大幅度地降低了整个系统的功耗和体积；通过设计并实现高性能温度控制电路、电流控制电路和稳频电路，得到了线宽较窄、频率稳定度较高的输出激光。该系统能够自动长期稳频，输出激光线宽约为1 MHz，稳定度指标为秒稳定度1.43×10-10，十秒稳定度3.90×10-11，百秒稳定度1.28×10-11，千秒稳定度2.25×10-11。在稳定度略优于商用外腔半导体激光器的前提下，该激光系统电源体积缩小了约85%，整机功耗降低了约90%，为实现半导体稳频激光系统的低功耗和小型化提供了一种新的方案。
激光器 频率稳定度 饱和吸收谱 低功耗 小型化
