Dual-channel optical phase measurement system for improved precision.
Developments and applications of a dual-channel phase measurement system are being proposed and experimentally studied by utilizing an optical homodyne technique. In this measurement system, the phase modulation was adopted by using a near-stable Zn-indiffused lithium niobate phase modulator. The proposed method was successfully applied on the simultaneous measurements of the phase-retardation difference between a transmitted light and a reflected light after passing through a nonpolarization beam splitter. The measured stability of the phase-retardation difference was approximately 0.0013 rad.
Twu
Ruey-Ching
RC
Department of Electro-Optical Engineering, Southern Taiwan University, Tainan, Taiwan. rctwu@mail.stut.edu.tw
Hong
Hao-Yang
HY
Lee
Hsuan-Hsien
HH