SIMULTANEOUS INTERROGATION OF INTERFEROMETRIC AND BRAGG GRATING SENSORS

被引：17

作者：

BRADY, G ^{[1
]}

KALLI, K ^{[1
]}

WEBB, DJ ^{[1
]}

JACKSON, DA ^{[1
]}

REEKIE, L ^{[1
]}

ARCHAMBAULT, JL ^{[1
]}

机构：

[1] UNIV SOUTHAMPTON,OPT ELECTR RES CTR,SOUTHAMPTON SO9 5NH,HANTS,ENGLAND

来源：

OPTICS LETTERS | 1995年 / 20卷 / 11期

关键词：

Interferometers - Mirrors - Optical filters - Optical resolving power - Phase shift - Photodiodes - Piezoelectric transducers - Signal detection - Signal to noise ratio - Strain;

D O I：

10.1364/OL.20.001340

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose a new method for the simultaneous interrogation of conventional two-beam interferometers and Bragg grating sensors. The technique employs an unbalanced Mach-Zehnder interferometer illuminated by a single low-coherence source, which acts as a wavelength-tunable source for the grating and as a path-matched filter for the Fizeau interferometer, thus providing a high phase resolution output for each sensor. The grating sensor demonstrates a dynamic strain resolution of similar to 0.05 mu epsilon/root Hz at 20 Hz, while the interferometric phase resolution is better than 1 mrad/root Hz at 20 Hz, corresponding to an rms mirror displacement of 0.08 nm.

引用

页码：1340 / 1342

页数：3

共 5 条

[1]

FARAHI F, 1988, OPT COMMUN, V65, P31

[2]

KERSEY AD, 1993, P SOC PHOTO-OPT INS, V2071, P30, DOI 10.1117/12.165923

[3] FIBEROPTIC BRAGG GRATING STRAIN SENSOR WITH DRIFT-COMPENSATED HIGH-RESOLUTION INTERFEROMETRIC WAVELENGTH-SHIFT DETECTION [J].

KERSEY, AD ;

BERKOFF, TA ;

MOREY, WW .

OPTICS LETTERS, 1993, 18 (01) :72-74

[4] 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

[5]

NORTON DA, 1992, P SOC PHOTO-OPT INST, V1795, P371

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