摘要
单向放大在光信号处理与光通信中扮演着不可或缺的角色,其既可以对信号光进行放大,也可以为避免信号源受到反向杂散光影响提供一种关键的保护手段。基于Λ型三能级原子系统实现了光场的单向放大,在铷原子气体中,仅用一束控制场,在实验上获得了前向25 dB的增益和后向超过30 dB的隔离度;同时,探讨了铷气室温度和控制场强度对单向放大的影响。
Unidirectional amplification of light plays an indispensable role in optical signal processing and optical communication.It can not only amplify the signal light,but also provide a key protection to avoid the signal being affected by the reverse stray light.In this paper,unidirectional amplification of light is achieved with the simple Lambda-type three-level atomic system.Using only one control field,a gain of more than 25 dB for the forward signal and an isolation of more than 30 dB for the backward one is realized using the rubidium atomic gas.Furthermore,the effects of the rubidium cell temperature and the intensity of the control field on the unidirectional amplification are also investigated in detail.
作者
黄策
刘立峰
张示城
钮月萍
龚尚庆
HUANG Ce;LIU Lifeng;ZHANG Shicheng;NIU Yueping;GONG Shangqing(School of Physics,East China University of Science and Technology,Shanghai 200237,China)
出处
《华东理工大学学报(自然科学版)》
CAS
CSCD
北大核心
2023年第6期915-920,共6页
Journal of East China University of Science and Technology
基金
国家自然科学基金(12034007
11974109
12004112)
上海市扬帆计划(20YF1410800)。
关键词
光学非互易
单向放大
热原子气体
三能级体系
无磁
optical non-reciprocity
unidirectional amplification
thermal atomic vapor
three-level system
non-magnetic