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Research on Dual-Channel High-Precision Laser Current and Temperature Control System
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DOI：10.1587/elex.23.20260053.png)
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Abstract
En 中文
This study addresses the core challenge of output optical frequency and wavelength instability in semiconductor lasers within high-precision quantum sensing systems, which is caused by drive current fluctuations and operating temperature drift. A dual-channel, high-precision current drive and temperature control system was successfully developed. The drive circuit employs a Howland circuit, which integrates an adjustable current-limiting protection circuit based on a comparator and DAC. This effectively reduces circuit noise and allows for the flexible setting of current-limiting thresholds to accommodate different lasers. To address the poor stability and large steady-state error of traditional PID control systems caused by the nonlinear characteristics of NTC thermistors, a segmented adaptive PID control strategy was proposed. This achieved precise temperature regulation within +/- 0.005 degrees C across the 20-40 degrees C control range.
Keywords:
Quantum sensing system
current drive
temperature control
adaptive PID control
Journal
IF:
0.7
Papers:
204
Citations:
1.6K
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Cited Papers