RESIDUAL PUMP LIGHT ATTENUATING FIBRE USING YB AND ERBIUM ATOMS IN ROTATION SENSOR SYSTEMS

A length of an absorbing optical fiber is connected to receive light output from an optically pumped light source. The light source includes a gain fiber that is doped with erbium. Pumping the erbium with a pump wavelength of 980 nm causes the erbium to emit light having a wavelength of 1550 nm. Ytt...

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Bibliographische Detailangaben
Hauptverfasser:	PHILLIPS, EDWARD, HUANG, SIDNEY X. Y
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BASIC ELECTRIC ELEMENTS DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING DEVICES USING STIMULATED EMISSION ELECTRICITY FREQUENCY-CHANGING GYROSCOPIC INSTRUMENTS MEASURING MEASURING DISTANCES, LEVELS OR BEARINGS NAVIGATION NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHOTOGRAMMETRY OR VIDEOGRAMMETRY PHYSICS SURVEYING TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TESTING
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Beschreibung
Zusammenfassung:	A length of an absorbing optical fiber is connected to receive light output from an optically pumped light source. The light source includes a gain fiber that is doped with erbium. Pumping the erbium with a pump wavelength of 980 nm causes the erbium to emit light having a wavelength of 1550 nm. Ytterbium ions in the absorbing fiber attenuate light having the pump wavelength without affecting the intensity of the 1550 nm light output from the erbium in the gain fiber.