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1 August 1990 Dual-wavelenth passive homodyne detection unit for fiber-coupled white-light interferometers
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Proceedings Volume 1267, Fiber Optic Sensors IV; (1990)
Event: The International Congress on Optical Science and Engineering, 1990, The Hague, Netherlands
This paper is devoted to the description of a prototype Emission/Detection Unit, the ACCORD® Module, developed for the accurate demodulation of fiber optic sensors using spectral modulation encoding techniques. This prototype contains a static polarimetric interferometer with 4 ports to provide the four phase signals needed by the passive homodyne scheme, and uses a dual-wavelength arrangement to extend the measurement range by removing the 2ic ambiguity in the phase determination. Resolution as high as A/40000 has been achieved with 1 Hz bandwith and Optical Path Difference mismatch in a 20 microns range.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michel Lequime, Catherine Lecot, Hugues Giovannini, and Serge J. Huard "Dual-wavelenth passive homodyne detection unit for fiber-coupled white-light interferometers", Proc. SPIE 1267, Fiber Optic Sensors IV, (1 August 1990);

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