1 August 1990 Dual-wavelenth passive homodyne detection unit for fiber-coupled white-light interferometers
Author Affiliations +
Proceedings Volume 1267, Fiber Optic Sensors IV; (1990) https://doi.org/10.1117/12.20316
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, Michel Lequime, Catherine Lecot, Catherine Lecot, Hugues Giovannini, Hugues Giovannini, Serge J. Huard, 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); doi: 10.1117/12.20316; https://doi.org/10.1117/12.20316

Back to Top