High-resolution distributed sensor using dark Brillouin scattering

Anthony W. Brown; Kellie A. Brown; Bruce G. Colpitts

doi:10.1117/12.657656

30 March 2006 High-resolution distributed sensor using dark Brillouin scattering

Anthony W. Brown, Kellie A. Brown, Bruce G. Colpitts

Proceedings Volume 6167, Smart Structures and Materials 2006: Smart Sensor Monitoring Systems and Applications; 616718 (2006) https://doi.org/10.1117/12.657656
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2006, San Diego, California, United States

Abstract

Distributed sensors based on time-domain Brillouin scattering have typically had spatial resolutions in the metre range, with some advanced systems improving upon this by an order of magnitude. Resolution in the centimetre range generally has been made possible by using correlation based systems or frequency-domain approaches. Both of these techniques suffer from practical limits on overall sensing length and/or acquisition speed. We present a new technique which uses dark pulses to implement a time-domain sensor system that provides centimetre resolution, short acquisition times and minimal restrictions on sensing length. The method is verified through simulation and results are shown to demonstrate the technique's efficacy in two practical applications.

Citation Download Citation

Anthony W. Brown, Kellie A. Brown, and Bruce G. Colpitts "High-resolution distributed sensor using dark Brillouin scattering", Proc. SPIE 6167, Smart Structures and Materials 2006: Smart Sensor Monitoring Systems and Applications, 616718 (30 March 2006); https://doi.org/10.1117/12.657656

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