【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。更多还原

【Abstract】 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.更多还原