Patent ID: 7110626
Filing Date: 2006-09-19
Classification: G01H

Abstract:
1. A fiber optic vibration sensor, comprising: an optical fiber of a tubular configuration comprised of a cladding layer and a core, having a first end, a second end and a vibration sensitive region, the vibration sensitive region being configured to cause a variation of transmitted or reflected light rays in said optical fiber according to a vibration of said optical fiber; a source of laser for emitting laser light rays onto said first end of said optical fiber; an optical diode connected to said second end of said optical fiber; and an optical wave analyzer connected to said optical diode and adapted to sense variations in light rays in said optical fiber caused by said vibration sensitive region; wherein said vibration sensitive region comprises at least a polished region formed by polishing a side of said optical fiber and a grating formed in said polishing region.