基于数字滤波的半导体激光器温控系统设计

摘要

To maintain the stability of emission wavelength of an optical transceiver and break through the routine design that the existing semiconductor laser temperature control systems were mostly implemented by analog devices , a semiconductor laser temperature control system based on digital filtering was proposed .By using digital signal processing in the form of firmware, temperature control of semiconductors was implemented .This system was applied to an optical transceiver module . Through theoretical analysis and experimental verification , the dependence of emission wavelength on the temperature was obtained.The test results show that the system achieves stable performance and good temperature control precision of ±0.053℃.%为了使光收发模块发射光波长稳定，突破现有半导体激光器温控系统大都采用模拟器件实现的常规设计，提出了一种基于数字滤波方式的控制方案，采用数字信号处理方式，以固件形式实现了半导体激光器温度控制。通过理论分析和实验验证，取得了采用该方案的光收发模块在应用温度范围内的发射波长变化数据。结果表明，该系统性能稳定，温度控制精度达±0．053℃。