Measurement of the pressure sensitivity of single-mode optical-fibre phase modulators
- 1 January 1978
- journal article
- Published by Institution of Engineering and Technology (IET) in IEE Journal on Microwaves, Optics and Acoustics
- Vol. 2 (6) , 204-208
- https://doi.org/10.1049/ij-moa.1978.0044
Abstract
Theory predicts that, at a wavelength of 0.6328 μm, the pressure sensitivities of silica and borosilicate glass single-mode optical-fibre phase modulators are 6.4 rad/m interaction length per bar of pressure, and 44 rad/m/bar, respectively. The experimental technique described for measuring this pressure sensitivity uses a Raman-Nath water diffraction cell to produce an acoustic wave of calculable pressure amplitude, and a Mach-Zehnder heterodyning interferometer for measuring the fibre-optic phase-modulation index. The experimental measurements of pressure sensitivity are in sensible agreement with theory.Keywords
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