Light intensity fluctuation insensitive faraday polarimeter for atomic magnetometer

摘要：

Atomic Magnetometer has ranked the highest sensitive magnetometer in recent years. To realize a high performance atomic magnetometer, a well designed polarimeter is required to detect the atomic spin precession. Among various polarimeter techniques available, faraday polarimeter is suitable for high sensitive atomic magnetometer application due to its high angular sensitivity at low frequency range. However, this polarimeter is sensitive to light intensity fluctuation which will decrease the atomic magnetometer sensitivity and its long time performance. Instead of utilizing a light intensity feedback controlled system to active stabilize the light intensity, this paper proposed a faraday polarimeter with light intensity fluctuation compensation capability. The structure and mathematic model of this polarimeter was analyzed, experimental tests were performed. With this polarimeter, the light intensity fluctuation was decreased significantly to 0.001％, and an angular sensitivity of 10-8 rad/Hz1/2 has been achieved.

关键词： polarimeter faraday modulator light intensity fluctuation atomic magnetometer.

作者: Qin Jie Fang Jiancheng Wan Shuangai

作者单位: Department of Instrument Science and Opto-electron Technology,Beihang University

会议类型: 国际会议

会议名称: 2011 10th International Conference on Electronic Measurement & Instruments(第十届电子测量与仪器国际会议 ICEMI2011)

会议地点: 成都

会议语种:英文

页码: 564-568

在线出版日期: 2011-08-16（万方平台首次上网日期，不代表论文的发表时间）