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
Abstract
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, 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
PROCEEDINGS
11 PAGES


SHARE
Back to Top