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Determining quasi-static measurands without a receiving interferometer using a simple dual-wavelength technique

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)

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. (Contact us about this Publication)
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
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) > TA166 Instrumentation
Divisions: Faculties > Sciences > School of Physical Sciences > Applied Optics Group
Depositing User: F.D. Zabet
Date Deposited: 24 Jun 2009 17:36 UTC
Last Modified: 08 Aug 2019 07:56 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/18675 (The current URI for this page, for reference purposes)
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