Non-contact surface vibration analysis using a monomode fibre optic interferometer incorporating an open air path
- 1 July 1985
- journal article
- Published by IOP Publishing in Journal of Physics E: Scientific Instruments
- Vol. 18 (7) , 604-608
- https://doi.org/10.1088/0022-3735/18/7/015
Abstract
A very high sensitivity non-contacting vibration analysis system based upon a monomode fibre optic Mach Zehnder interferometer incorporating an open air path is described. The system was operated in both a closed loop limited tracking range (>105) homodyne mode and an effective infinite tracking range novel pseudo-heterodyne mode. For periodic signals, amplitude detection sensitivities of approximately 2*10-10 m at 10 Hz to 5*10-11 m at 10 kHz have been demonstrated for both modes of operation.Keywords
This publication has 11 references indexed in Scilit:
- Pseudo-heterodyne detection scheme for the fibre gyroscopeElectronics Letters, 1984
- Pseudoheterodyne detection scheme for optical interferometersElectronics Letters, 1982
- Optical techniques to solve the signal fading problem in fiber interferometersApplied Optics, 1982
- Optical phase and amplitude measurement by single sideband homodyne detectionIEEE Journal of Quantum Electronics, 1982
- A prototype digital phase tracker for the fibre interferometerJournal of Physics E: Scientific Instruments, 1981
- Elimination of drift in a single-mode optical fiber interferometer using a piezoelectrically stretched coiled fiberApplied Optics, 1980
- Fiber optic heterodyne interferometer for vibration measurements in biological systemsReview of Scientific Instruments, 1978
- Light-scattering heterodyne interferometer for vibration measurements in auditory organsThe Journal of the Acoustical Society of America, 1976
- Laser Heterodyne System for Measurement and Analysis of VibrationThe Journal of the Acoustical Society of America, 1970
- Motion sensing by optical heterodyne Doppler detection from diffuse surfacesProceedings of the IEEE, 1965