摘要
垂直腔面发射激光器(VCSEL)是原子磁强计和原子钟等光学量子仪器的核心部件,其输出激光的稳定性将直接影响仪器的测量精度和灵敏度等关键参数。本文介绍了一种以ZYNQ7010为控制核心的VCSEL数字驱动电路,该电路使用XTR111芯片提供VCSEL所需的高稳定电流,并通过MAX1978芯片控制VCSEL内部集成的半导体制冷器(TEC)实现高精度温控。实验结果表明,本文设计的驱动电路可输出0~2 mA的线性可调电流,调节精度优于0.04 mA,TEC的温控精度优于0.1℃;最终在1.325 mA的驱动电流和63℃的工作温度下,VCSEL的最大输出功率漂移和波长漂移分别为0.001 mW和0.004 nm。该数字驱动电路可满足原子磁强计等高精度测量仪器对光源驱动的需求。
Vertical Cavity Surface Emitting Laser(VCSEL)is the critical component of optical quantum instruments including atomic magnetometers and atomic clocks.The stability of the VCSEL′s output laser significantly impacts key parameters,such as the measurement accuracy and sensitivity of these instruments.This paper introduces a VCSEL digital drive circuit with ZYNQ7010 FPGA as a controller,which uses the XTR111 chip to supply the high-stability current required by the VCSEL,and controls the semiconductor cooler(TEC)integrated inside the VCSEL to realize high-precision temperature control through the MAX1978 chip.The experimental result shows that the designed drive circuit can output linearly adjustable current range from 0 mA to 2 mA,with an adjustment accuracy better than 0.04 mA.Additionally,the temperature control accuracy of the TEC is better than 0.1℃.Finally,at a driving current of 1.325 mA and an operating temperature of 63℃,the VCSEL exhibits minimal drift,with the maximum output power and wavelength drifts measuring 0.001 mW and 0.004 nm,respectively.This digital drive circuit meets the requirements of light source driving for high-precision measuring instruments such as atomic magnetometers.
作者
卫英泽
廖英
周建斌
童欣
叶凡
李松松
罗朋奎
黎荣锋
WEI Ying-ze;LIAO Ying;ZHOU Jian-bin;TONG Xin;YE Fan;LI Song-song;LUO Peng-kui;LI Rong-feng(College of Nuclear Technology and Automation Engineering,Chengdu University of Technology,Chengdu 610059,China;School of Mechanical and Electrical Engineering,Chengdu University of Technology,Chengdu 610059,China;The Institute of High Energy Physics of the Chinese Academy of Sciences,Beijing 100049,China;China Spallation Neutron Source Science Center,Dongguan 523803,China;Guangdong Provincial Key Laboratory of Extreme Conditions,Dongguan 523803,China;School of Mechanical Engineering,Dongguan University of Technology,Dongguan 523808,China)
出处
《激光与红外》
北大核心
2025年第1期18-25,共8页
Laser & Infrared
基金
国家重点研发计划项目(No.2022YFA1604104)
广东省自然科学基金杰出青年项目(No.2021B1515020101)
广东省极端条件重点实验室项目(No.2023B1212010002)资助。
作者简介
卫英泽(1998-),男,硕士研究生,主要研究方向为精密仪器测量。E-mail:18435921346@163.com;通讯作者:周建斌(1971-),男,博士,教授,主要研究方向为核分析方法、核辐射探测、核仪器设备研发。E-mail:2022736355@qq.com。
