采用基于声光调制器的相干检测方案的超低噪声光注入锁定放大器。

Ultra-low noise optical injection locking amplifier with AOM-based coherent detection scheme.

作者信息

Feng Zitong, Yang Fei, Zhang Xi, Chen Dijun, Wei Fang, Cheng Nan, Sun Yanguang, Gui Youzhen, Cai Haiwen

机构信息

Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques, Shanghai Institute of Optics and fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, China.

University of the Chinese Academy of Sciences, Beijing, 100049, China.

出版信息

Sci Rep. 2018 Sep 3;8(1):13135. doi: 10.1038/s41598-018-31381-x.

DOI:10.1038/s41598-018-31381-x

PMID:30177754

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6120882/

Abstract

A novel optical injection locking amplifier with acousto-optic modulator based phase modulation and a coherent detection scheme for optical frequency transfer applications is experimentally demonstrated in this study. A commercial distributed feedback diode laser is injection-locked to the resonant frequency of the optical signal with an optical fiber path length of hundreds of kilometers. This provides approximately 59 dB gain and ensures that the input carrier frequency fractional stability can be as good as 10 at 1000 s. The amplifier was tested for the transfer of a commercial narrow-linewidth laser in a 180 km fiber link to a remote site with only a single amplification step. The transferred frequency at the remote end reached 10 at 20000 s, which is suitable for optical frequency distribution and remote comparison between optical atomic clocks.

摘要

本研究通过实验展示了一种新型光注入锁定放大器，其具有基于声光调制器的相位调制以及用于光频传输应用的相干检测方案。一个商用分布反馈二极管激光器通过数百公里长的光纤路径被注入锁定到光信号的谐振频率。这提供了约59 dB的增益，并确保输入载波频率分数稳定性在1000 s时可达10 。该放大器在180 km光纤链路中对商用窄线宽激光器进行传输测试，仅经过单步放大就将其传输到远程站点。在远程端，传输频率在20000 s时达到10 ，适用于光频分布以及光原子钟之间的远程比对。