Observation of intensity-induced nonreciprocity in a fiber-optic gyroscope

Nonreciprocal phase shift has been predicted and observed in a fiber-optic gyroscope based on a Sagnac interferometer when the intensities of the counterpropagating beams are unequal. The magnitude of this intensity-induced phase shift is 1.4 rad/W power difference. At 1-microW power difference, thi...

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Bibliographic Details
Published inOptics letters Vol. 7; no. 9; p. 457
Main Authors Ezekiel, S, Davis, J L, Hellwarth, R W
Format Journal Article
LanguageEnglish
Published United States 01.09.1982
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Summary:Nonreciprocal phase shift has been predicted and observed in a fiber-optic gyroscope based on a Sagnac interferometer when the intensities of the counterpropagating beams are unequal. The magnitude of this intensity-induced phase shift is 1.4 rad/W power difference. At 1-microW power difference, this is equivalent to a rotation rate of 0.2 degrees /h in our 200-m-long fiber with a core radius of 2.25 microm that is wound around a spool of 19-cm diameter. The data are consistent with theoretical predictions based on four-wave mixing in the quartz fiber.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.7.000457