Transducer mandrel with attachment for holding fiber bragg grating mounting collar

• US 20080025668A1
• Filed: 07/27/2006
• Published: 01/31/2008
• Est. Priority Date: 07/27/2006
• Status: Active Grant

• Current Assignee: Litton Systems Incorporated
• Original Assignee: Litton Systems Incorporated
• Inventors: Mansell, John, Arab-Sadeghabadi, Akbar, Krystkowiak, Joseph, Shaibani, Sanan
• Granted Patent: US 7,424,186 B2
• Time in Patent Office: Days
• US Class Current: 385/37
• CPC Class Codes: G01D 5/35303 using a reference fibre, e.g. interferometric devices
• CPC Class Codes: G01D 5/35354 Sensor working in reflection
• CPC Class Codes: G01H 9/004 using fibre optic sensors light guides per se G02B6/00, acousto-optical devices specially adapted for gating or modulating in optical wave guides G02F1/125
• CPC Class Codes: G01L 11/025 using a pressure-sensitive optical fibre

Abstract

A fiber optic acoustic transducer includes a mandrel having a first portion that preferably formed generally as a cylinder having a projection extending from one end. A grating collar also preferably formed in a generally cylindrical configuration. The grating collar has a passage extending therethrough so that it may mounted on the projection. An optical fiber has a sensor portion wound around the first portion of the mandrel and a second portion wound around the grating collar with a fiber Bragg grating being formed in the second portion of the optical fiber.

Claims

1. A fiber optic transducer, comprising:

a mandrel having a first portion and a second portion extending from an end of the first portion;

a grating collar having a passage extending therethrough such that the grating collar is formed for mounting on the projection; and

an optical fiber having a sensor portion wound around the first portion of the mandrel and a second portion wound around the grating collar with a fiber Bragg grating being formed in the second portion of the optical fiber.

2. A fiber optic transducer according to claim 1 wherein the projection is formed as a cylinder.

3. A fiber optic transducer according to claim 2 wherein the grating collar is formed in a generally cylindrical configuration having a cylindrical passage extending therethrough.

4. A fiber optic transducer according to claim 1 wherein the first portion of the mandrel is formed generally as a cylinder.