McGarrity, Craig D. and Jackson, David A. (1996) Determining quasi-static measurands without a receiving interferometer using a simple dual-wavelength technique. In: DePaula, Ramon P. and Berthold, John W., eds. Fiber Optic and Laser Sensors XIV. Proceedings of SPIE . SPIE, pp. 122-132. ISBN 0-8194-2227-4. (doi:10.1117/12.255344) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:18675)
The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. | |
Official URL: http://dx.doi.org/10.1117/12.255344 |
Abstract
A technique using dual-wavelength interferometry which permits the demodulation of quasi-static measurands from very short cavities is introduced. It requires the optical path difference of the sensor to be perturbed and a careful choice of the two wavelengths. Under these conditions comparable resolution and range to conventional dual- wavelength white-light interferometry is obtained. A remote receiving interferometer is not required. Experimental verification of this technique using a fiber Mach-Zehnder under conditions of natural drift are presented. A resolution of 0.2 nm (corresponding to 1.5 mrad at 827 nm) over an effective wavelength of 114.8 micrometer was achieved. Multiplexing using this demodulation technique is also presented. A network of eight sensors is demonstrated with the same resolution and range as the single Mach- Zehnder.
Item Type: | Book section |
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DOI/Identification number: | 10.1117/12.255344 |
Additional information: | Proceedings Paper |
Uncontrolled keywords: | dual-wavelength interferometry; Lissajous; multiplexing; demodulation |
Subjects: |
Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) > TA165 Engineering instruments, meters etc. Industrial instrumentation |
Divisions: | Divisions > Division of Natural Sciences > Physics and Astronomy |
Depositing User: | F.D. Zabet |
Date Deposited: | 24 Jun 2009 17:36 UTC |
Last Modified: | 16 Nov 2021 09:56 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/18675 (The current URI for this page, for reference purposes) |
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