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

Brady, G.P.; Kalli, Kyriacos; Webb, David J.; Jackson, David A.; Zhang, Lin and Bennion, Ian (1997). Extended-range, low coherence dual wavelength interferometry using a superfluorescent fibre source and chirped fibre Bragg gratings. Optics communications, 134 (1-6), pp. 341-348.

Abstract

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
Published Date: 1997-01-15

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