中国激光, 2017, 44 (4): 0404001, 网络出版: 2017-04-10
基于光纤噪声抑制系统的1.5 μm超稳激光系统比对 下载: 523次
Comparison of 1.5 μm Ultra-Stable Laser Systems Based on Fiber Noise Suppression System
激光光学 光纤相位噪声抑制 超稳激光 频率稳定度 窄线宽 laser optics fiber phase noise suppression ultra-stable laser frequency stability narrow linewidth
摘要
搭建了一套光纤相位噪声抑制系统。通过环外自拍频, 得到噪声本底的秒级频率稳定度为6.8×10-18, 2000 s平均时间后达到2.3×10-19。利用该系统可实现窄线宽激光频率在1.6 km实际光纤链路中的传输, 传输后环外自拍频信号的秒级频率稳定度可达1.2×10-17。基于连接两个实验室的808 m实际光纤链路, 将此系统应用于1.5 μm超稳激光的比对, 通过拍频测量得到激光线宽为(0.54±0.15) Hz, 秒级频率稳定度为1.2×10-15。
Abstract
A fiber phase noise suppression system is built. By out-of-loop self-beat frequency, the noise floor of 6.8×10-18 is obtained in the average time of 1 s, and it falls down to 2.3×10-19 after the average time of 2000 s. The laser frequency with narrow linewidth is transferred in a 1.6 km fiber link when we use the proposed system, and the frequency stability of out-of-loop self-beat frequency signal is 1.2×10-17 in the average time of 1 s. Based on the 808 m fiber link which connects the two laboratories, the laser linewidth of (0.54±0.15) Hz and the frequency stability of 1.2×10-15 in average time of 1 s can be obtained in beat frequency measurement when we apply the proposed system to the comparison of 1.5 μm ultra-stable laser systems.
王朝阳, 金尚忠, 李烨, 林弋戈, 方占军. 基于光纤噪声抑制系统的1.5 μm超稳激光系统比对[J]. 中国激光, 2017, 44(4): 0404001. Wang Zhaoyang, Jin Shangzhong, Li Ye, Lin Yige, Fang Zhanjun. Comparison of 1.5 μm Ultra-Stable Laser Systems Based on Fiber Noise Suppression System[J]. Chinese Journal of Lasers, 2017, 44(4): 0404001.