物理学报2016，Vol.65Issue(13)：134203-1-134203-8,8.DOI:10.7498/aps.65.134203
利用共振无源腔分析和抑制飞秒脉冲激光噪声的理论和实验研究∗
A broadband passive cavity for analyzing and filtering the noise of a femtosecond laser
摘要
Abstract
In this paper, the noise filtering effect on a femtosecond laser source via a broadband passive cavity is analyzed in detail. The results show that a passive optical cavity not only can be used as a low-pass noise filter, but also can inter-convert the phase and amplitude fluctuations of a light beam after transmission or reflection. Therefore, by measuring the intensity noise of the light field under test after transmission and reflection from a passive cavity, its phase noise properties can be explored. Based on this theoretical model, an eight-mirror ring passive cavity with a finesse of 1500 and a free spectral range of 75 MHz is designed and built. With a commercial Ti:sapphire femtosecond laser as a source, its intensity noises after transmission and reflection from the above cavity are measured with home-made self-homodyne detection setup. Furthermore, with the help of the noise conversion model of the passive cavity, the phase noise of the femtosecond laser as well as its evolution through the cavity transmission and reflection is indirectly derived. The result shows that after transmission through the passive cavity, both the amplitude and phase noise of the femtosecond laser source are evidently suppressed and reach the shot noise limit at the analyzing frequency of 2 MHz.关键词
无源腔/飞秒脉冲/强度噪声/相位噪声Key words
passive cavity/femtosecond pulsed laser/intensity noise/phase noise引用本文复制引用
项晓,刘涛,张首刚,王少锋,侯飞雁,权润爱,翟艺伟,王盟盟,周聪华,许冠军,董瑞芳..利用共振无源腔分析和抑制飞秒脉冲激光噪声的理论和实验研究∗[J].物理学报,2016,65(13):134203-1-134203-8,8.基金项目
国家自然科学基金(批准号:11174282,91336108,11273024,61127901)、国家自然科学基金青年科学基金(批准号:11403031)、中国科学院科技创新“交叉与合作团队”项目(批准号:中科院人教字(2012)119号)、中国科学院科研装备研制项目和中组部“青年拔尖人才支持计划”项目(批准号:组厅字[2013]33号)资助的课题.* Project supported by the National Natural Science Foundation of China (Grant Nos.11174282,91336108,11273024,61127901), the Young Scientists Fund of the National Natural Science Foundation of China (Grant No.11403031), the“CAS Interdisciplinary Innovation Team”Science and Technology Innovation Project (Grant No.(2012)119), the Research Equipment Development Project of Chinese Academy of Sciences, and the“Young Top-notch Talents”Program of Organi-zation Department of the CPC Central Committee, China (Grant No.[2013]33) （批准号:11174282,91336108,11273024,61127901）
