title: Optical throughput of the Sagnac interferometer with a modified large optical path difference.
abstract: The basic principle of Sagnac interferometer with modified large optical path difference is expounded on in this paper. According to the Fresnel formula, electromagnetic field energy, and energy flux, the transmittance and reflectance of each interface of a Sagnac interferometer are calculated, respectively, and then the exact expressions of the optical throughput changing with the incident angle, the angle of the incident plane, and paper plane (the bottom plane of Sagnac interferometer) and Sagnac interferometer acute angles are given. Furthermore, we analyze the effects of various parameters on the optical throughput by computer simulation, and some important conclusions are obtained. This work is of great scientific significance to the static, real-time simultaneous detection of upper atmospheric wind field.
authors.affiliation: MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Science, Xi’an Jiaotong University, Xi’an, China. zcm@mail.xjtu.edu.cn
authors.forename: Chunmin
authors.initials: C
authors.lastname: Zhang
authors.forename: Jingjing
authors.initials: J
authors.lastname: Ai
authors.forename: Peng
authors.initials: P
authors.lastname: Gao