Optics Letters, Vol. 40, Issue 1, pp. 29-32 (2015)

http://dx.doi.org/10.1364/OL.40.000029

http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-40-1-29

Su Zhan,¹ Xiao-Chun Duan,^1,2 Min-Kang Zhou,¹ Hui-Bin Yao,¹Wen-Jie Xu,¹ and Zhong-Kun Hu^1,*

¹Key Laboratory of Fundamental Physical Quantities Measurement of Ministry of Education, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China

²e-mail: duanxiaochun2011@hust.edu.cn

^*Corresponding author: zkhu@hust.edu.cn

Abstract

We present the investigation on the frequency-dependent amplification (FDA) of a tapered amplifier (TA) and the corresponding influence on Raman-type atom interferometers. In our interferometer, the output of two phase-locked diode lasers is injected into a TA to generate Raman beams. The frequency of one laser is chirped during the interfering process, which induces a variance of the Raman lasers power as a result of the FDA of the TA. The corresponding power ratio variation of the Raman lasers is measured by beat note method, which shows a linear dependence with a slope of −0.087(4)/GHz when the laser frequency changes over 2 GHz at 780 nm. The corresponding error related to AC Stark effect due to this frequency-dependent variation is estimated for our atom interferometer. The investigation presented here may provide hints for other experiments involving TAs.

© 2014 Optical Society of America