具有超窄带宽光学滤波的原子光受激放大器。

Atomic optical stimulated amplifier with optical filtering of ultra-narrow bandwidth.

作者信息

Pan Duo, Shi Tiantian, Luo Bin, Chen Jingbiao, Guo Hong

机构信息

State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, and Center for Quantum Information Technology, Peking University, Beijing, 100871, China.

State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, 100876, China.

出版信息

Sci Rep. 2018 Apr 26;8(1):6567. doi: 10.1038/s41598-018-24895-x.

DOI:10.1038/s41598-018-24895-x

PMID:29700329

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5919898/

Abstract

Taking advantages of ultra-narrow bandwidth and high noise rejection performance of the Faraday anomalous dispersion optical filter (FADOF), simultaneously with the coherent amplification of atomic stimulated emission, we propose a stimulated amplified Faraday anomalous dispersion optical filter (SAFADOF) at cesium 1470 nm. The SAFADOF is able to significantly amplify very weak laser signals and reject noise in order to obtain clean signals in strong background. We show that for a weak signal of 50 pW, the gain factor can be larger than 25000 (44 dB) within a bandwidth as narrow as 13 MHz. Having the ability to amplify weak signals with low background contribution, the SAFADOF finds outstanding potential applications in weak signal detections.

摘要

利用法拉第反常色散光学滤波器（FADOF）的超窄带宽和高噪声抑制性能，同时结合原子受激发射的相干放大，我们提出了一种用于铯1470nm波长的受激放大法拉第反常色散光学滤波器（SAFADOF）。SAFADOF能够显著放大非常微弱的激光信号并抑制噪声，以便在强背景中获得纯净信号。我们表明，对于一个50 pW的微弱信号，在仅13 MHz的窄带宽内，增益因子可大于25000（44 dB）。由于具备在低背景贡献下放大微弱信号的能力，SAFADOF在微弱信号检测中具有出色的潜在应用价值。