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Multiple wavelength laser light source using fluorescent fiber

A technology of fluorescent optical fiber and laser light source, which is applied in the direction of laser, optical waveguide coupling, laser parts, etc., can solve the problems of unavailability, achieve low cost improvement, low miniaturization, and prevent fiber damage and deterioration.

Inactive Publication Date: 2007-06-06
SUMITA OPTICAL GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, there is also the inconvenience that the excitation light exhibits blue-green color, and thus the desired (pure) blue light cannot be obtained as light emitted through the light emitting surface of the optical fiber

Method used

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  • Multiple wavelength laser light source using fluorescent fiber
  • Multiple wavelength laser light source using fluorescent fiber
  • Multiple wavelength laser light source using fluorescent fiber

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0020] 1 is a plan view for explaining a light emitting device as a multi-wavelength laser light source using a fluorescent fiber according to a first embodiment of the present invention. 2A and 2B are a perspective view and a cross-sectional view, respectively, for explaining a blue semiconductor laser element of a light emitting device according to a first embodiment of the present invention. Also, FIG. 3 is a cross-sectional view of a fluorescent optical fiber for explaining the light emitting device according to the first embodiment of the present invention.

[0021] [General Configuration of Light-Emitting Device 1 ]

[0022] Referring to Fig. 1, light-emitting device 1 roughly comprises: as the blue semiconductor laser element 2 of exciting light source; and the optical lens 4 interposed between the laser resonator 3 and the blue semiconductor laser element 2 .

[0023] [Structure of blue semiconductor laser element 2]

[0024] As shown in FIGS. 2A and 2B, blue semico...

no. 2 example

[0046] 5 is a cross-sectional view of a fluorescent optical fiber for explaining a light emitting device according to a second embodiment of the present invention. In FIG. 5, the same components as those shown in FIG. 3 are denoted by the same reference numerals, and detailed description thereof is omitted here.

[0047] As shown in FIG. 5 , the light emitting device 1 in the second embodiment (as shown in FIG. 1 ) is characterized in that the light emitting device 1 includes a fluorescent optical fiber 50 having a cladding component 51 including a corresponding A first cladding member 51A is formed adjacent to the peripheral surface of the core 17A, and a second cladding member 51B is formed adjacent to the peripheral surface of the first cladding member 51A.

[0048] For this reason, the refractive index n1 of the first cladding member 51A is set to be smaller than the refractive index n2 (n2⇴1.50) of the core 17A but larger than the refractive index n3 (n3≴1.45) of the seco...

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PUM

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Abstract

A multiple wavelength laser light source using a fluorescent fiber includes a blue semiconductor laser element ( 2 ) for emitting an excitation light (a), and an optical fiber ( 17 ) having a first side fiber end face and a second side fiber face, the excitation light (a) from the blue semiconductor laser element ( 2 ) being made incident to the first side fiber end face, the excitation light (a) thus made incident to the first side fiber end face being emitted through the second side fiber face, in which the optical fiber ( 17 ) has dichroic mirror portions constituting a laser resonator ( 3 ) in its first and second side fiber end faces, respectively, and a core of the optical fiber ( 17 ) is made of a wavelength-converting member including a low phonon glass containing therein at least praseodymium ions as trivalent rare earth ions for emitting wavelength conversion lights by being excited by the excitation light (a).

Description

[0001] This application is based on Japanese Patent Application No. 2005-346839, the entire contents of which are hereby incorporated by reference. technical field [0002] The present invention relates to a multi-wavelength laser light source using fluorescent optical fiber, and more particularly, to such a multi-wavelength laser light source using fluorescent optical fiber, which is suitable for use as various types of light sources, such as those used in liquid crystal televisions Backlight source. Background technique [0003] In recent years, semiconductor light-emitting elements such as light-emitting diode (LED) elements or stimulated radiation emission light amplification (laser) Element-based light emitting devices have been widely used as various types of light sources. [0004] When such a light source is used, for example, as a backlight light source of a color laser display device in order to obtain illumination light (multi-wavelength laser light), three kinds...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/42
CPCH01S5/34333H01S3/173H01S3/1613H01S3/0941G02F1/133602G02B6/03627H01S3/067H01S3/08086B82Y20/00H01S5/00
Inventor 山嵜正明石井修沢登成人永滨忍
Owner SUMITA OPTICAL GLASS