基于温度电流双反馈的半导体激光驱动器设计

Design of Semiconductor Laser Driver Based on Temperature Current Dual Feedback

摘要: 近年来半导体激光驱动技术日益成熟，激光器已在特定领域，例如光电传感、量子探测等行业中均有良好运用。现有恒功率控制主要通过调节电流或者温度分别实现，但由于缺乏协同分析，稳定能力有限，可能导致输出功率、光束质量等发生变化。为提升半导体激光器的稳定性，本文设计了一种电流与温度双反馈控制的驱动系统。该系统采用ADN2830芯片实现精密电流控制，结合MAX1978芯片构建温度调节回路，并通过STM32F103主控进行协同管理。测试结果表明，工作温度波动控制在±0.1℃以内，输出光功率稳定性变化不超过1%，为小功率半导体激光器提供了高可靠性驱动解决方案。

Abstract: In recent years, semiconductor laser driving technology has become increasingly mature, and lasers have been well applied in specific fields such as optoelectronic sensing, quantum detection, and other industries. The existing constant power control is mainly achieved by adjusting the current or temperature separately, but due to the lack of collaborative analysis, its stability is limited, which may lead to changes in output power and beam quality. To improve the stability of semiconductor lasers, this paper designs a driving system with dual feedback control of current and temperature. The system uses ADN2830 chip to achieve precision current control, combined with MAX1978 chip to construct a temperature regulation circuit, and coordinated management through STM32F103 main control. The test results show that the operating temperature fluctuation is controlled within ±0.1˚C, and the stability of the output optical power does not change by more than 1%, providing a highly reliable driving solution for low-power semiconductor lasers.