Title:
BRAGG GRATING PRESSURE SENSOR
Document Type and Number:
WIPO Patent Application WO2000037914
Kind Code:
A9
Abstract:
A fiber grating pressure sensor includes an optical sensing element (20, 600) which includes an optical fiber (10) having a Bragg grating (12) impressed therein which is encased within and fused to at least a portion of a glass capillary tube (20) and/or a large diameter waveguide grating (600) having a core and a wide cladding and which has an outer transverse dimension of at least 0.3 mm. Light (14) is incident on the grating (12) and light (16) is reflected from the grating (12) at a reflection wavelength lambda 1. The sensing element (20, 600) may be used by itself as a sensor or located within a housing (48, 60, 90, 270, 300). When external pressure P increases, the grating (12) is compressed and the reflection wavelength lambda 1 changes.
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Inventors:
FERNALD MARK R
BAILEY TIMOTHY J
MILLER MATTHEW B
SULLIVAN JAMES M
DUNPHY JAMES R
DAVIS MICHAEL A
KERSEY ALAN D
WRIGHT CHRISTOPHER J
PUTNAM MARTIN A
BRUCATO ROBERT N
SANDERS PAUL E
BAILEY TIMOTHY J
MILLER MATTHEW B
SULLIVAN JAMES M
DUNPHY JAMES R
DAVIS MICHAEL A
KERSEY ALAN D
WRIGHT CHRISTOPHER J
PUTNAM MARTIN A
BRUCATO ROBERT N
SANDERS PAUL E
Application Number:
PCT/US1999/028868
Publication Date:
March 29, 2001
Filing Date:
December 06, 1999
Export Citation:
Assignee:
CIDRA CORP (US)
International Classes:
G01L1/24; G01J3/18; G01L11/00; G01L11/02; G02B5/18; G02B6/00; G02B6/02; (IPC1-7): G01L11/02; G01L1/24
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