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

Yu-Lung Lo, Ping Feng Hsu

研究成果: Conference contribution

摘要

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.

原文English
主出版物標題Proceedings of the Second International Symposium on Instrumentation Science and Technology
編輯T. Jiubin, W. Xianfang, T. Jiubin, W. Xianfang
出版狀態Published - 2002 12月 1
事件Proceedings of the second International Symposium on Instrumentation Science and Technology - Jinan, China
持續時間: 2002 8月 182002 8月 22

出版系列

名字Proceedings of the Second International Symposium on Instrumentation Science and Technology
2

Other

OtherProceedings of the second International Symposium on Instrumentation Science and Technology
國家/地區China
城市Jinan
期間02-08-1802-08-22

All Science Journal Classification (ASJC) codes

  • 工程 (全部)

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