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Proceedings Paper

Fiber-Gyro With Integrated-Optic Phase Modulator And Spectrally Broad Light Sources
Author(s): G. Domann
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Paper Abstract

So far most of the fiber-optic gyros with high resolution and low drift have been realized as all fiber devices /1,2/. Common to these interferometers was the use of phase-modu-lators and of spectrally broad sources. According to Petermann et al. /3/ and to Burns and Moeller /4/ the combination of a spectrally broad light source with a highly birefringent fiber results in an efficient reduction of the short term noise as well as an increase in drift stability. In this paper we report on a fiber-gyro composed of an integrated-optic phase modulator and polarization maintaining fibers. Two light sources with different spectral characteristics were investigated: a superluminescent diode (ELED) and a gain-guided laser (GGL). In both cases a high drift stability was encountered for low power operation. For higher light levels (and thus smaller linewidth) a drift of the output of the gyro occurred, which was found to be caused by reflections from the integrated optic phase modulator. A modified modulation scheme is presented to overcome this problem.

Paper Details

Date Published: 12 November 1984
PDF: 4 pages
Proc. SPIE 0514, 2nd Intl Conf on Optical Fiber Sensors: OFS'84, (12 November 1984); doi: 10.1117/12.945094
Show Author Affiliations
G. Domann, SEL-Research-Center (Germany)

Published in SPIE Proceedings Vol. 0514:
2nd Intl Conf on Optical Fiber Sensors: OFS'84
Ralf Th. Kersten; Rainer Kist, Editor(s)

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