Extended-range, low coherence dual wavelength interferometry using a superfluorescent fibre source and chirped fibre Bragg gratings


We describe an all-fibre, passive scheme for making extended range interferometric measurements based on the dual wavelength technique. The coherence tuned interferometer network is illuminated with a single superfluorescent fibre source at 1.55 µm and the two wavelengths are synthesised at the output by means of chirped fibre Bragg gratings. We demonstrate an unambiguous sensing range of 270 µm, with a dynamic range of 2.7 × 10 5.

Uncontrolled Keywords: extended range interferometric measurements, dual wavelength technique, coherence tuned interferometer network
Publication ISSN: 0030-4018
Last Modified: 23 Oct 2019 10:34
Date Deposited: 13 Dec 2010 12:31
Published Date: 1997-01-15
Authors: Brady, G.P.
Kalli, Kyriacos
Webb, David J.
Jackson, David A.
Zhang, Lin
Bennion, Ian


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