Absolute displacement measurement by using the synthesized modulation index of a frequency-modulated interferometer

Lih Wuu Chang, Ching Ting Lee, Pie Yau Chien

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A novel absolute displacement measurement by using a heterodyne interferometer, with a frequency-modulated laser diode has been successfully implemented. In this signal processing scheme, the synthesized modulation index of a phase-modulated interferometer is used for measuring the displacement, which is independent of the variation of the modulation frequency. The error induced from the intensity modulation in the laser diode can be eliminated.

Original languageEnglish
Pages (from-to)3085-3087
Number of pages3
JournalReview of Scientific Instruments
Volume68
Issue number8
DOIs
Publication statusPublished - 1997 Jan 1

All Science Journal Classification (ASJC) codes

  • Instrumentation

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