| 用于原子干涉仪的光学锁相环系统 |
| An Optical Phase-lock Loop System for Atom Interferometers |
| |
| HTML 查看全文 查看/发表评论 下载PDF阅读器 |
| 中文摘要: |
| 研制了一种用于原子干涉仪的外差式光学锁相环系统，实现了两台外腔半导体激光器频率和相位的同步，锁相后的激光拍频线宽低于1 Hz，10 MHz积分带宽内的残余相位噪音为0.002 rad2，频偏1~100 kHz范围内的相位噪音达到-100 dBc/Hz。研究了闭环相位噪音对原子干涉仪的影响，当自由演化时间为200 ms、拉曼π脉冲时间为30 μs、单次循环时间为1 s时，锁相后相位噪音对重力测量灵敏度的贡献为10μGal?Hz-1/2 |
| 英文摘要: |
| We present a heterodyne optical phase-lock loop system for atom interferometers. The frequency and phase synchronization of two external cavity semiconductor lasers are realized. The laser beat signal linewidth is less than 1 Hz, the residual phase noise within 10 MHz integral bandwidth is 0.002 rad2, and the phase noise reaches a flat floor of ?100 dBc/Hz in the offset frequency range of 1kHz to 100kHz. We researched the impact on the sensitivity of the atomic measurement. Using the 200ms’ interrogation time, the 30μs’ π Raman pulse duration time and the 1s’ cycle time, we calculated that our system would allow us to reach a sensitivity to acceleration as low as 10μGal?Hz-1/2. |
|
| 中文关键词: 光学锁相环 相位噪音 原子干涉仪 灵敏度 |
| 英文关键词:optical phase-lock loop phase noise atom interferometers sensitivity |
| 基金项目: |
| DOI：10.11823/j.issn.1674-5795.2020.06.05 |
| 引用本文：白金海，胡栋，贡昊，王宇.用于原子干涉仪的光学锁相环系统[J].计测技术,2020,(6):. |
| 关闭 |
