title: Investigating the frequency-dependent amplification of a tapered amplifier in atom interferometers.
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.
authors.forename: Su
authors.initials: S
authors.lastname: Zhan
authors.forename: Xiao-Chun
authors.initials: XC
authors.lastname: Duan
authors.forename: Min-Kang
authors.initials: MK
authors.lastname: Zhou
authors.forename: Hui-Bin
authors.initials: HB
authors.lastname: Yao
authors.forename: Wen-Jie
authors.initials: WJ
authors.lastname: Xu
authors.forename: Zhong-Kun
authors.initials: ZK
authors.lastname: Hu