COMPENSATED BROADBAND FIBER LIGHT SOURCE WITH STABLE MEAN WAVELENGTH FOR A FIBER OPTIC GYRO

A fiber light source (605, 705) comprises a laser pump (654, 754) configured to generate a pump laser beam at a predetermined wavelength;a first segment of rare earth doped fiber (652-1, 752-1); a second segment of rare earth doped fiber (652-2, 752-2); and an optical coupler (656, 756) coupled to a...

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Bibliographic Details
Main Authors SANDERS, Steven J, QIU, Tiequn
Format Patent
LanguageEnglish
French
German
Published 05.06.2019
Subjects
BASIC ELECTRIC ELEMENTS
DEVICES USING STIMULATED EMISSION
ELECTRICITY
GYROSCOPIC INSTRUMENTS
MEASURING
MEASURING DISTANCES, LEVELS OR BEARINGS
NAVIGATION
PHOTOGRAMMETRY OR VIDEOGRAMMETRY
PHYSICS
SURVEYING
TESTING
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Summary:A fiber light source (605, 705) comprises a laser pump (654, 754) configured to generate a pump laser beam at a predetermined wavelength;a first segment of rare earth doped fiber (652-1, 752-1); a second segment of rare earth doped fiber (652-2, 752-2); and an optical coupler (656, 756) coupled to a first end of the first segment and a first end of the second segment. The optical coupler (656, 756) is configured to split the pump laser beam based on a power coupling ratio. The first segment generates a first stimulated emission having a first mean wavelength sensitivity to pump laser power fluctuations and the second segment generates a second stimulated emission having a second mean wavelength sensitivity to pump laser power fluctuations such that an output (664, 764) of a combined stimulated emission from first and second stimulated emissions presents a mean wavelength which is approximately insensitive to pump laser power fluctuations. An optical fiber gyro comprising the above-described fiber light source is also disclosed.
Bibliography:Application Number: EP20150191537