OPTICAL SEMICONDUCTOR DEVICE

PROBLEM TO BE SOLVED: To obtain an optical semiconductor device which can prevent element degradation by decomposing and removing an organic substance adhered to the emission end face of a light-emitting element, without using an external light source requiring the impression of a drive voltage. SOL...

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Bibliographic Details
Main Authors OTA YOICHIRO, SASAKI HAJIME
Format Patent
LanguageEnglish
Published 12.11.2009
Subjects
BASIC ELECTRIC ELEMENTS
DEVICES USING STIMULATED EMISSION
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
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Summary:PROBLEM TO BE SOLVED: To obtain an optical semiconductor device which can prevent element degradation by decomposing and removing an organic substance adhered to the emission end face of a light-emitting element, without using an external light source requiring the impression of a drive voltage. SOLUTION: A laser diode 10 (light-emitting element) emits light 12 from an emission end face 10a. A TiO2film 16 (organic substance adhesion prevention film) is formed in the emission end face 10a of the laser diode 10. The TiO2film 16 generates a photocatalytic reaction which decomposes and removes the organic substance when a light of specific wavelength is irradiated. A reflecting mirror 18 reflects a part of the light 12 emitted from the laser diode 10, and irradiates the TiO2film 16. A wavelength converter 20 converts the wavelength of a light 22 for irradiating the TiO2film 16 into such a wavelength that TiO2film 16 generates the photocatalytic reaction. COPYRIGHT: (C)2010,JPO&INPIT
Bibliography:Application Number: JP20080115603