New heterodyne scheme using an electro-optic modulator for birefringence measurements

Yu-Lung Lo, Ping Feng Hsu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A new method for measuring changes in birefringence (or retardation) by modulating an electro-optic (EO) modulator in a sine-wave signal is developed in a common-path interferometer (polarimeter). The standard heterodyne signal, therefore, could be formed with a new heterodyne scheme, and subsequently the phase shift regarding to changes in birefringence is demodulated by a lock-in amplifier or phase meter. As compared to the conventional techniques, this technique supplies an easier setup, wider modulated frequency and, therefore, a wider frequency response in a sensing system. Finally, the birefringence measurement based on an EO modulator and a new heterodyne scheme in a common-path interferometer is first demonstrated.

Original languageEnglish
Title of host publicationProceedings of the Second International Symposium on Instrumentation Science and Technology
EditorsT. Jiubin, W. Xianfang, T. Jiubin, W. Xianfang
Publication statusPublished - 2002 Dec 1
EventProceedings of the second International Symposium on Instrumentation Science and Technology - Jinan, China
Duration: 2002 Aug 182002 Aug 22

Publication series

NameProceedings of the Second International Symposium on Instrumentation Science and Technology
Volume2

Other

OtherProceedings of the second International Symposium on Instrumentation Science and Technology
CountryChina
CityJinan
Period02-08-1802-08-22

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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