A passive method to compensate nonlinearity in a homodyne interferometer.
This study presents an analysis of the nonlinearity resulting from polarization crosstalk at a polarizing beam splitter (PBS) and a wave plate (WP) in a homodyne interferometer. From a theoretical approach, a new compensation method involving a realignment of the axes of WPs to some specific angles according to the characteristics of the PBS is introduced. This method suppresses the nonlinearity in a homodyne interferometer to 0.36 nm, which would be 3.75 nm with conventional alignment methods of WPs.
Ahn
Jeongho
J
Division of Mechanical Engineering, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon, 305-701, Republic of Korea.
Kim
Jong-Ahn
JA
Kang
Chu-Shik
CS
Kim
Jae Wan
JW
Kim
Soohyun
S
D000465:Algorithms; D016477:Artifacts; D003198:Computer Simulation; D007368:Interferometry / Q000379:methods*; D008962:Models, Theoretical; D017711:Nonlinear Dynamics