SPATIALLY WEIGHTED, GRATING-BASED, 2-MODE, ELLIPTIC-CORE OPTICAL FIBER VIBRATION SENSORS

被引：9

作者：

VENGSARKAR, AM

GREENE, JA

FOGG, BR

MURPHY, KA

机构：

[1] Fiber and Electro-Optics Research Center, Bradley Department of Electrical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA

来源：

OPTICS LETTERS | 1991年 / 16卷 / 21期

关键词：

D O I：

10.1364/OL.16.001707

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Photoinduced refractive-index changes in two-mode, elliptical-core optical fibers affect the beat length and the sensor sensitivity. Chirped gratings are written by attaching such fibers to cantilever beams positioned in a strained state. We show that fibers with in-line chirped gratings, with the chirp being shaped in the form of a vibration-mode shape, can be used as spatially weighted fiber sensors for vibration analysis. We demonstrate enhanced detection of the first and second modes of vibration of a cantilever beam using this process; vibration-mode suppression of the order of 10 dB is obtained.

引用

页码：1707 / 1709

页数：3

共 12 条

[1] DISTRIBUTED PIEZOELECTRIC POLYMER ACTIVE VIBRATION CONTROL OF A CANTILEVER BEAM [J].

BAILEY, T ;

HUBBARD, JE .

JOURNAL OF GUIDANCE CONTROL AND DYNAMICS, 1985, 8 (05) :605-611

[2] STRAIN EFFECTS ON HIGHLY ELLIPTIC CORE 2-MODE FIBERS [J].

BLAKE, JN ;

HUANG, SY ;

KIM, BY ;

SHAW, HJ .

OPTICS LETTERS, 1987, 12 (09) :732-734

[3] PHOTOSENSITIVITY IN OPTICAL FIBER WAVEGUIDES - APPLICATION TO REFLECTION FILTER FABRICATION [J].

HILL, KO ;

FUJII, Y ;

JOHNSON, DC ;

KAWASAKI, BS .

APPLIED PHYSICS LETTERS, 1978, 32 (10) :647-649

[4] NARROW-BAND BRAGG REFLECTORS IN OPTICAL FIBERS [J].

KAWASAKI, BS ;

HILL, KO ;

JOHNSON, DC ;

FUJII, Y .

OPTICS LETTERS, 1978, 3 (02) :66-68

[5] MODAL SENSORS ACTUATORS [J].

LEE, CK ;

MOON, FC .

JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME, 1990, 57 (02) :434-441

[6] FORMATION OF BRAGG GRATINGS IN OPTICAL FIBERS BY A TRANSVERSE HOLOGRAPHIC METHOD [J].

MELTZ, G ;

MOREY, WW ;

GLENN, WH .

OPTICS LETTERS, 1989, 14 (15) :823-825

[7]

MURPHY KA, 1990, J LIGHTWAVE TECHNOL, V8, P1688

[8]

OULLETTE F, 1991, OPT LETT, V16, P303

[9] ALL-OPTICAL INTERMODAL SWITCH USING PERIODIC COUPLING IN A 2-MODE WAVE-GUIDE [J].

PARK, HG ;

HUANG, SY ;

KIM, BY .

OPTICS LETTERS, 1989, 14 (16) :877-879

[10] INTERMODAL COUPLER USING PERMANENTLY PHOTOINDUCED GRATING IN 2-MODE OPTICAL FIBER [J].

PARK, HG ;

KIM, BY .

ELECTRONICS LETTERS, 1989, 25 (12) :797-799

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