Extended-range, low coherence dual wavelength interferometry using a superfluorescent fibre source and chirped fibre bragg gratings
Journal
Optics Communications
Date Issued
January 15, 1997
Author(s)
DOI
10.1016/S0030-4018(96)00558-5
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 × 105