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Fiber-Optic Sensor Array Based on Sagnac Interferometer with Stable Phase Bias
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- Authors
- Ki Ho Han, Wang Joo Lee, Byoung Yoon Kim
- Issue Date
- 2001-02
- Citation
- IEEE Photonics Technology Letters, v.13, no.2, pp.148-150
- ISSN
- 1041-1135
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- We propose and experimentally demonstrate a novel fiber sensor array based on Sagnac interferometer with very simple electronic signal processing. A stable quadrature phase bias was obtained using a phase modulator, and polarization-induced signal fading was suppressed by using a depolarizer and a broad-band source. Phase sensitivity of about 4.0 μradrms/?닖Hz at 5 kHz was obtained using a two-sensor array.
- KSP Keywords
- Fiber Optic Sensor, Fiber Sensor, Phase sensitivity, Quadrature Phase, Sagnac interferometer, Sensor array, Signal fading, broad-band, electronic signal processing, phase modulator