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Wavelength Lock-in Technique to improve Fiber Interferometer Performance for Geophysics Applications

Abstract : An automatic wavelength lock-in technique is proposed to improve fiber interferometer performance for geophysics application. The proposed approach locks the laser wavelength to the absorption lines of hydrogen fluoride gas. The lock-in scheme directly benefits from the dithering signal driving the laser to obtain the required quadrature phase shift for displacement reconstruction and thus does not affect the sensor operation.
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https://hal.laas.fr/hal-02454118
Contributor : Olivier Bernal <>
Submitted on : Friday, January 24, 2020 - 11:37:48 AM
Last modification on : Thursday, January 30, 2020 - 11:41:51 AM
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Olivier Bernal, M. Cattoen, Françoise Lizion, R. Briand, P. Chawah, et al.. Wavelength Lock-in Technique to improve Fiber Interferometer Performance for Geophysics Applications. 2019 IEEE SENSORS, Oct 2019, Montreal, Canada. pp.1-4, ⟨10.1109/SENSORS43011.2019.8956756⟩. ⟨hal-02454118⟩

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