1-cm spatial resolution with large dynamic range in strain distributed sensing by Brillouin optical correlation domain reflectometry based on intensity modulation

Sitthipong Manotham; Masato Kishi; Zuyuan He; Kazuo Hotate

doi:10.1117/12.914248

30 January 2012 1-cm spatial resolution with large dynamic range in strain distributed sensing by Brillouin optical correlation domain reflectometry based on intensity modulation

Sitthipong Manotham, Masato Kishi, Zuyuan He, Kazuo Hotate

Author Affiliations +

Proceedings Volume 8351, Third Asia Pacific Optical Sensors Conference; 835136 (2012) https://doi.org/10.1117/12.914248
Event: Asia Pacific Optical Sensors Conference, 2012, Sydney, Australia

Abstract

We experimentally demonstrate distributed strain measurement with a high spatial resolution and a large dynamic range by proposing a system for Brillouin optical correlation domain reflectometry with an intensity modulation scheme. With the optimized intensity modulation, the optical power spectrum of the light source is properly modified so that the accumulated background noise in the Brillouin gain spectrum is significantly reduced. It is confirmed that the proposed system enables us to extend the maximum measurable strain up to ~7000 με, which is sufficient for practical applications of a distributed sensing, with 1-cm spatial resolution. This resolution is the best result ever reported in reflectometries based on spontaneous Brillouing scattering by using a conventional single mode fiber.

Citation Download Citation

Sitthipong Manotham, Masato Kishi, Zuyuan He, and Kazuo Hotate "1-cm spatial resolution with large dynamic range in strain distributed sensing by Brillouin optical correlation domain reflectometry based on intensity modulation", Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 835136 (30 January 2012); https://doi.org/10.1117/12.914248

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