Infrared and Laser Engineering, Volume. 45, Issue 12, 1205004(2016)
Temperature controller for DFB laser utilized in SERF atomic magnetometer
As the working temperature can affect emitting wavelength of distributed feedback(DFB) laser and reduce measurement sensitivity of magnetic field of Spin-Exchange-Relaxation-Free(SERF) atomic magnetometer, a DFB lasers′ temperature controller with high-precision and high stability was designed and developed by using digital proportional-integral-differential(PID) control technology, which is based on TMS320LF2812 core controller. In terms of hardware design, the temperature controller consists of temperature control forward pathway and temperature acquisition backward pathway to form a complete closed-loop temperature control structure. In consideration of software design, the three parameters P, I and D are determined by using Ziegler-Nichols engineering setting method. Using the aforementioned temperature controller, a temperature controlling test was performed on a DFB laser with a center wavelength at 852 nm. Experimental results indicate that, the control scale is 5-60 ℃, the accuracy is ±0.02 ℃, and the control procedure is 20 s. Meanwhile, the stability of working temperature is better than 7.9×10-4(RMS) during long term(220 min) running, which provides performance guarantee for SERF atomic magnetometer in practical application.
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Chen Chen, Qin Jianan, Zhang Xue, Lin Jun, Wang Yanzhang. Temperature controller for DFB laser utilized in SERF atomic magnetometer[J]. Infrared and Laser Engineering, 2016, 45(12): 1205004
Category: 激光器技术
Received: Apr. 5, 2016
Accepted: May. 10, 2016
Published Online: Jan. 12, 2017
The Author Email: Chen Chen (cchen@jlu.edu.cn)