Intracavity-dynamics-based optical phase amplifier with over tenfold amplification  

作　　者：MINGWANG TIAN YIDONG TAN 

机构地区：[1]The State Key Laboratory of Precision Measurement Technology and Instruments,Department of Precision Instrument,Tsinghua University,Beijing 100084,China

出　　处：《Photonics Research》2023年第11期1892-1901,共10页光子学研究（英文版）

基　　金：Tsinghua Initiative Scientific Research Program(2021Z11GHX002)。

摘　　要：The relative phase change between two light fields can be used as a fundamental parameter to measure the physical quantity causing this change.Therefore,amplifying the relative phase change becomes attractive to improve the measurement resolution.Phase amplification using a many-body entangled state(NOON state)is a well-known method;nevertheless,the preparation process for a high-number NOON state is difficult and sensitive to optical loss.Here,we propose and experimentally verify a concise phase amplification method with a tolerance of about five orders of magnitude for optical loss.The method is based on the optical-feedback-induced intracavity harmonics generation effect to amplify the phase change by 11 times,which is comparable to the highest level of about 10 experimentally reached in NOON states.Furthermore,the 20th intracavity harmonic is generated when the reinjected photon number increases,indicating that 20 times phase amplification is attainable.The proposed method has a prospect for precision measurement applications.

关 键 词：OPTICAL AMPLIFIER PHASE 

分 类 号：O431.2[机械工程—光学工程] TN722[理学—光学]