基于VCSEL的无磁温控系统设计  

Design of non-magnetic temperature control system based on VCSEL

作　　者：刘宇 荀宇洁 曾中明[1] 吴东岷[1] LIU Yu;XUN Yujie;ZENG Zhongming;WU Dongmin(Nano-Fabrication Facility,Suzhou Institute of Nano-tech and Nano-bionics,Chinese Academy of Sciences,Suzhou 215123,China)

机构地区：[1]中国科学院苏州纳米技术与纳米仿生研究所纳米加工平台,苏州215123

出　　处：《激光杂志》2025年第1期16-22,共7页Laser Journal

基　　金：国家重点研发计划(No.2021YFB3202200)。

摘　　要：垂直腔面发射激光器(Vertical-cavity surface-emitting laser,VCSEL)是小型化原子磁强计的重要组成部分,为了满足原子磁强计对高稳定性、高灵敏度激光器温控系统的需求,研究了一套基于XILINX-7000系列Zynq7020芯片的无磁高频加热电路,通过增量式PID算法实现高频加热信号的幅度调制,该电路既可以稳定控制VCSEL的温度,又可以避免产生低频磁场。Zynq7020具有独特的PS(Processing System)和PL(Programmable Logic)架构,利用PL端的高速并行性驱动多个外围芯片,利用PS端的灵活便捷性进行增量式PID的计算,二者通过Block RAM共享缓存数据,实现了对VCSEL温度的闭环控制。经测试,该系统可以对VCSEL实现快速、稳定的温度控制,其在200 s内便可加热至80℃,且温度稳定性高于±0.003℃;在外加电流干扰时可于20 s内恢复稳定,具有良好的抗干扰性。Vertical-cavity surface-emitting laser(VCSEL)is an important part of miniaturized atomic magnetometer.In order to meet the needs of atomic magnetometer for high stability and high sensitivity laser temperature control system,this paper studies A set of non-magnetic high-frequency heating circuit based on the XILINX-7000 series Zynq7020 chip is developed.The amplitude modulation of the high-frequency heating signal is realized through the incremental PID algorithm.This circuit can stably control the temperature of the VCSEL and avoid the generation of low-frequency magnetic fields.Zynq7020 has a unique PS(Processing System)and PL(Programmable Logic)architecture.This article uses the high-speed parallelism of the PL side to drive multiple peripheral chips,and uses the flexibility and convenience of the PS side to perform incremental PID calculations.The two are shared through Block RAM Caching data realizes closed-loop control of VCSEL temperature.After testing,the system can achieve fast and stable temperature control of VCSEL.It can be heated to 80℃within 200 s,and the temperature stability is higher than±0.003℃;it can restore stability within 20 s when external current interference occurs,has good anti-interference performance.

关 键 词：VCSEL 原子磁强计 温控系统 Zynq7020、PID算法 

分 类 号：TN402[电子电信—微电子学与固体电子学]