title: [Theoretical analysis of the residual amplitude modulation of frequency modulation strong absorption spectroscopy].
abstract: In the present paper a phase controllable waveplate model was applied to the analysis of polarization maintaining fiber. Under the temperatures of 24 degrees C and 26.8 degrees C there is no residual amplitude modulation (RAM) existing in frequency modulation spectroscopy (FMS) when performing the measurement of fiber temperature dependence on the RAM. However, the temperature setting can not reduce the background long term drift and a servo feedback suggested by N. C. Wong and J. L. Hall can be used to actively reduce the RAM. The error signal for feedback is from the dispersion background signal of FMS without gas sample. The variation of RAM induced by the temperature changing of PM fiber is the main reason for the long term background drift of dispersion signal of FMS.
authors.forename: Wei-Guang
authors.initials: WG
authors.lastname: Ma
authors.forename: Zhi-Xin
authors.initials: ZX
authors.lastname: Li
authors.forename: Wei
authors.initials: W
authors.lastname: Tan
authors.forename: Xiao-Fang
authors.initials: XF
authors.lastname: Fu
authors.forename: Gang
authors.initials: G
authors.lastname: Zhao
authors.forename: Lei
authors.initials: L
authors.lastname: Dong
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.forename: Wang-Bao
authors.initials: WB
authors.lastname: Yin
authors.forename: Suo-Tang
authors.initials: ST
authors.lastname: Jia