Temperature-insensitive strain sensor with polarization-maintaining photonic crystal fiber based Sagnac interferometer
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- 9 April 2007
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 90 (15), 151113
- https://doi.org/10.1063/1.2722058
Abstract
A fiber-optic strain sensor is demonstrated by using a short length of polarization-maintaining photonic crystal fiber (PM-PCF) as the sensing element inserted in a Sagnac loop interferometer.Spectrum shift in response of strain with a sensitivity of 0.23 pm ∕ μ ε is achieved, and the measurement range, by stretching the PM-PCF only, is up to 32 m ε . Due to the ultralow thermal sensitivity of the PM-PCF, the proposed strain sensor is inherently insensitive to temperature, eliminating the requirement for temperature compensation.Keywords
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