Adaptive Fiber-Optical Sensor System for Pico-Strain and Nano-Displacement Metrology

Abstract:

Adaptive fiber-optic interferometer which is based on multimode optical fiber as a sensor and diffusion holograms recorded in semiconductor photorefractive crystal CdTe:V without any electric field is developed. The interferometer sensitivity achieved is only 5.7 times less then highest sensitivity which is possible only in non-adaptive lossless classical interferometer. A practical detection limit is equal to Hz W nm 10 0 3 5 − × . , which allows to broadband detecting of an object’s displacement of order 0.2 nm or deformation of order 2 pε with using light sources having only 5 mW optical power.

• Periodical: Key Engineering Materials (Volumes 381-382)
• Pages: 61-64
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.381-382.61
• Online since: June 2008
• Authors: Roman V. Romashko, Y.N. Kulchin, S.D. Girolamo, A. Kamshilin, J.C. Launay
• Keywords: Adaptive Interferometer, Dynamic Hologram, Fiber Optical Sensor, Nano-Displacement Metrology, Photorefractive Crystal, Pico-Strain Metrology

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DOI: 10.1007/978-3-540-47056-4_9