光泵磁力仪中垂直腔面发射激光器激光波长锁定

doi:10.16183/j.cnki.jsjtu.2022.371

上海交通大学学报 ›› 2024, Vol. 58 ›› Issue (4): 438-448.doi: 10.16183/j.cnki.jsjtu.2022.371

光泵磁力仪中垂直腔面发射激光器激光波长锁定

骆曼箬¹, 李绍良², 黄艺明¹, 张弛¹, 吴招才³, 刘华¹()

1.上海交通大学电子信息与电气工程学院,上海 200240
2.上海航天控制技术研究所上海空间智能控制技术重点实验室,上海 201109
3.自然资源部第二海洋研究所,杭州 310012

收稿日期:2022-09-23 修回日期:2022-12-11 接受日期:2022-12-21 出版日期:2024-04-28 发布日期:2024-04-30
通讯作者: 刘华,副教授;E-mail:liuyuhua@sjtu.edu.cn.
作者简介:骆曼箬(1997-),硕士生,从事VCSEL激光研究.
基金资助:
上海航天先进技术联合研究基金(USCAST2019-23);上海交通大学“深蓝计划”基金项目(SL2021ZD202)

Wavelength Locking of Vertical-Cavity Surface-Emitting Laser in Optically Pumped Magnetometer

LUO Manruo¹, LI Shaoliang², HUANG Yiming¹, ZHANG Chi¹, WU Zhaocai³, LIU Hua¹()

1. School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2. Shanghai Key Laboratory of Space Intelligent Control Technology, Shanghai Institute of Spaceflight Control Technology, Shanghai 201109, China
3. Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China

Received:2022-09-23 Revised:2022-12-11 Accepted:2022-12-21 Online:2024-04-28 Published:2024-04-30

摘要/Abstract

摘要：

针对光泵磁力仪(OPM)对小型化、低功耗以及激光光源波长稳定性的要求,提出一套垂直腔面发射激光器激光波长锁定控制方案.所提基于多普勒吸收的光反馈波长锁定方案以 ¹³³Cs 原子D1线F_g = 4→F_e = 3超精细能级跃迁波长为参考波长,OPM的原子蒸汽气室同时作为波长锁定的工作气室,无需任何额外装置即可将激光波长锁定在该D1线跃迁波长.使用数字比例积分微分控制与模糊控制算法进行激光的温度控制,使温度波动在 ±0.005 ℃ 内;采用基于电流镜的激光电流驱动方案,使电流波动在±50 nA内,为激光波长锁定提供了良好的硬件基础.最后,在实验室环境下实现OPM长达2 h的稳定信号输出.

关键词: 光泵磁力仪, 垂直腔面发射激光器, 波长锁定, 激光稳频

Abstract:

Aimed at the requirements of optically pumped magnetometer (OPM) for miniaturization, low power consumption and laser frequency stability, a wavelength locking control scheme for vertical-cavity surface-emitting laser is proposed. The proposed method of laser wavelength locking based on Doppler absorption optical feedback takes the wavelength of D1 line F_g = 4→F_e = 3 transition in ¹³³Cs atom as the reference. The atom vapor cell in OPM is also used as the working cell for wavelength locking so that the laser wavelength can be locked on the corresponding wavelength of the D1 line transition without any additional setup. The digital proportional integral differential and fuzzy control algorithm is used for laser temperature control and the temperature fluctuation is within ±0.005 ℃. Laser current driving is realized based on current mirror and the current fluctuation is within ±50 nA, which provides a good hardware foundation for laser wavelength locking. Finally, a stable signal output of the OPM for up to two hours under laboratory conditions is realized.

Key words: optically pumped magnetometer (OPM), vertical-cavity surface-emitting laser (VCSEL), wavelength locking, laser frequency stabilization

中图分类号:

TN248.4

骆曼箬, 李绍良, 黄艺明, 张弛, 吴招才, 刘华. 光泵磁力仪中垂直腔面发射激光器激光波长锁定[J]. 上海交通大学学报, 2024, 58(4): 438-448.

LUO Manruo, LI Shaoliang, HUANG Yiming, ZHANG Chi, WU Zhaocai, LIU Hua. Wavelength Locking of Vertical-Cavity Surface-Emitting Laser in Optically Pumped Magnetometer[J]. Journal of Shanghai Jiao Tong University, 2024, 58(4): 438-448.

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跃迁能级	λ/nm	I_out/mA
F_g = 3 → F_e = 4	894.5862	1.07308
F_g = 3 → F_e = 3	894.5893	1.08033
F_g = 4 → F_e = 4	894.6107	1.13221
F_g = 4 → F_e = 3	894.6138	1.13907

光泵磁力仪中垂直腔面发射激光器激光波长锁定

Wavelength Locking of Vertical-Cavity Surface-Emitting Laser in Optically Pumped Magnetometer

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R_f/kΩ	温度增益/ (mV·℃^-1)	采集精度要求/μV	表示温度范围/℃
5.6	25	25	0~133
10	45	45	24~85
22	100	100	42~66