摘要
基于TEC的控温方案被广泛应用于光传输系统。PID补偿网络决定了控温系统的响应速度和温度稳定性。模拟PID补偿网络的硬件核心则是运算放大器,大量文献对PID补偿进行了分析,但是对核心运放却鲜有研究。本文利用自校准技术,设计了一款低失调、高精度运算放大器,动态消除引入PID补偿网络的直流失调及噪声,有效地提高温控系统精度。该运放在180nm CMOS工艺平台集成为工程化产品,并在我国千兆宽带战略主流光网终端的光模块上进行了验证,结果表明,在试验的温度范围内,中心波长1577nm的EML激光器波长漂移小于0.05nm,温度得到了精确、高效的控制。
Based on TEC(Thermoelectric Cooler)temperature control scheme is widely used in optical transmission system.PID(Proportion Integrator Differentiator)compensation network determines the temperature control system response speed and stability.The hardware core of analog PID compensation network is op-amp.There are a lot of literatures on PID compensation,but few researches on core op-amps.A low offset and high precision op-amp is designed with self-calibration technology to dynamiclly eliminate the direct current offset and noise in the PID compensation network and effectively improve the precision of the temperature control system.The op-amp is integrated into an engineering product on the 180nm CMOS process platform and verified on the optical module of the Gigabit Broadband Strategic mainstream optical network terminal,the results show that in the temperature range of the test,the wavelength shift of EML laser with central wavelength of 1577nm is less than 0.05nm,and the temperature is precisely and effectively controlled.
出处
《中国集成电路》
2020年第5期36-39,共4页
China lntegrated Circuit
关键词
激光器
温度控制
PID补偿
自校准技术
运算放大器
laser
temperature control
PID compensation
self-calibration technology
operatoinal amplifier
