22 August 1980 Recovery Of Phase Modulated Signals In Multimode Optical Fibres
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Proceedings Volume 0232, 1980 Intl Optical Computing Conf II; (1980) https://doi.org/10.1117/12.958893
Event: 1980 Technical Symposium East, 1980, Washington, D.C., United States
Coherent light propagating along a multimode optical fibre may be phase modulated by external disturbances including changes in for instance the pressure or temperature of the medium surrounding the fibre. At the output from a multimode fibre, a direct phase to amplitude modulation conversion effect takes place at the detector, and this signal may be used to detect the presence of the environmental change. However, the phase detection process is intrinsically non-linear and is subject to fading effects. This paper concentrates on describing techniques whereby reliable and consistent phase detection techniques may be implemented by optical means and presents the results obtained in the actual use of some of these techniques.
© (1980) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
P. R. Ball, P. R. Ball, B. Culshaw, B. Culshaw, S. A. Kingsley, S. A. Kingsley, } "Recovery Of Phase Modulated Signals In Multimode Optical Fibres", Proc. SPIE 0232, 1980 Intl Optical Computing Conf II, (22 August 1980); doi: 10.1117/12.958893; https://doi.org/10.1117/12.958893

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