1 中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室, 湖北 武汉 430071
2 中国科学院武汉物理与数学研究所,中国科学院原子频标重点实验室, 湖北 武汉 430071
3 中国科学院大学, 北京 100049
为抑制连续激光器的长期频率漂移,以精密波长计为参考频率标准,由计算机控制可 实现连续激光无调制稳频。此方法从计算机获取波长计数据,利用数字比例积分微分(PID)计算 出输出给激光器的反馈电压值,从而修正激光器腔长、实现激光器频率的锁定。此方法可用于目前 商业激光器光谱范围内的任意波长,能在激光器频率可调节范围内任意频率点进行锁定。用此方法实现了对631 nm外腔 半导体激光器的锁定,获得了1 h频率不确定度为7.4 MHz、长期频率漂移率为±1.1 MHz/h的稳定锁定。
激光技术 频率稳定 计算机控制 长期漂移 laser technology frequency stabilization computer control long-term drift
Author Affiliations
Abstract
1 State Key Laboratory of Magnetic and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China
2 Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China
3 University of Chinese Academy of Sciences, Beijing 100049, China
We demonstrate time-division-multiplexing (TDM) laser seeded optical amplification in a diode laser amplifier. With an acousto-optic modulator we combine two seeding beams of different frequencies and inject them alternately in the time domain into the tapered amplifier (TA) chip at a switching speed of 200 ns. The output high-power dual frequency components from the TA are time separated. The TDM seeded TA works safely and efficiently, which is useful for compact precision measurement instruments such as optical clocks and atom interferometers.
140.2020 Diode lasers 140.3280 Laser amplifiers 230.4110 Modulators 250.6715 Switching Chinese Optics Letters
2015, 13(1): 011401
