论文部分内容阅读
半导体激光器常用于抽运与检测激光光源用于原子物理实验与量子科学仪器的研究,而半导体激光器的各特性参数,如阈值电流、峰值波长、输出功率、使用寿命等,均与温度相关,因此对其进行温度控制很重要.根据激光器输出功率与温度之间的关系,提出一种基于光电二极管(PD)的激光器温度控制系统,通过激光管内部集成的PD所获得的激光器光功率,进而得出激光器发光芯片温度,与热敏电阻相结合,以半导体制冷芯片为执行器,构成双闭环控制系统,可实现高精度长期稳定激光器温度控制,稳定度优于±5 m K,能够满足原子物理实验与研究对半导体激光器的要求.
Semiconductor lasers are commonly used for pumping and detecting laser light sources for atomic physics experiments and quantum science instruments. The characteristics of semiconductor lasers such as threshold current, peak wavelength, output power, and lifetime are all temperature dependent It is very important to control the temperature of the laser.According to the relationship between laser output power and temperature, a laser diode temperature control system based on photodiode (PD) is proposed. The laser power obtained through the PD integrated in the laser tube, The temperature of the laser light-emitting chip is combined with the thermistor, and the semiconductor cooling chip is used as the actuator to form a double closed-loop control system, which can realize the long-term and stable laser temperature control with high precision and stability of better than ± 5 m K and can satisfy atomic physics Experimental and research requirements for semiconductor lasers.