WAVELENGTH-SWEPT LIGHT SOURCE

PROBLEM TO BE SOLVED: To provide a wavelength-swept light source that can sweep light of a narrow spectral line width and can be formed inexpensively. SOLUTION: The wavelength-swept light source comprises: a semiconductor optical amplifier 10; a ringed optical feedback system 11 for feeding back lig...

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Bibliographic Details
Main Authors MUKAI ATSUSHI, SONODA SHINICHIRO
Format Patent
LanguageEnglish
Published 14.01.2010
Subjects
BASIC ELECTRIC ELEMENTS
DEVICES USING STIMULATED EMISSION
ELECTRICITY
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Summary:PROBLEM TO BE SOLVED: To provide a wavelength-swept light source that can sweep light of a narrow spectral line width and can be formed inexpensively. SOLUTION: The wavelength-swept light source comprises: a semiconductor optical amplifier 10; a ringed optical feedback system 11 for feeding back light emitted from one end face of the semiconductor optical amplifier 10 to the element from the other end face; a fiber Fabry-Perot etalon 14 for transmitting the light traveling in the ringed optical feedback system 11 by wavelength selection and continuously varying the selected wavelengths; and means 15 for taking out part of the light traveling in the ringed optical feedback system 11. The fiber Fabry-Perot etalon 14 is disposed apart from the lengthwise midpoint of the ringed optical feedback system 11. A current modulation means 17, 18 is further provided for setting a current applied to the semiconductor optical amplifier 10 to be less than an oscillation threshold at least in the period when light reflected by the fiber Fabry-Perot etalon 14 returns to the semiconductor optical amplifier 10, and setting the applied current to be equal to or more than the oscillation threshold in the other period. COPYRIGHT: (C)2010,JPO&INPIT
Bibliography:Application Number: JP20080164170