Predetection correlation in a spread-spectrum multiplexing system for fiber optic interferometers

Hamed S. Al-Raweshidy; Deepak G. Uttamchandani

doi:10.1117/12.24761

1 February 1991 Predetection correlation in a spread-spectrum multiplexing system for fiber optic interferometers

Hamed S. Al-Raweshidy, Deepak G. Uttamchandani

Proceedings Volume 1367, Fiber Optic and Laser Sensors VIII; (1991) https://doi.org/10.1117/12.24761
Event: SPIE Microelectronic Interconnect and Integrated Processing Symposium, 1990, San Jose, United States

Abstract

A novel spread spectrum technique is reported for passive multiplexing of interferometric optical fiber sensors. The technique relies on digital spread spectrum modulation of an optical source, and the use of correlation techniques to distinguish signals arriving from specified sensors in the network. The unique feature of the system is that correlation is achieved by the use of an integrated optic modulator, prior to optical detection. Pre-detection correlation exploits the high bandwidth of integrated optic devices, and enables the use of low bandwidth photodetectors and other (electrical) post-detection components.

Citation Download Citation

Hamed S. Al-Raweshidy and Deepak G. Uttamchandani "Predetection correlation in a spread-spectrum multiplexing system for fiber optic interferometers", Proc. SPIE 1367, Fiber Optic and Laser Sensors VIII, (1 February 1991); https://doi.org/10.1117/12.24761

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