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Interrogation of High-Finesse FBG Resonators by Laser-Frequency Locking for High-Sensitivity Strain Sensing

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A strain detection method, relying on active frequency-locking of a laser to high-reflectivity FBG-based cavities, is reported. The locking-loop signal serves as a fast and sensitive monitor of the strain acting on the intra-cavity fiber.

© 2006 IEICE

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