Fiber laser device and a laser apparatus
AssigneeHoya Corporation
InventorsHiroshi Sekiguchi, Akiyoshi Tanaka
Life of this patent
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Abstract
A laser fiber 1 is wound around an outer peripheral face 2a of a glass cylindrical member 2 serving as a structural member which can confine excitation lights L1 and L2 for exciting the laser fiber 1. The excitation lights L1 and L2 from laser diodes 41 and 42 impinge on the vicinity of the outer peripheral end portion of an end face 2b of the glass cylindrical member 2, through prisms 31 and 32, and confined by repeating total reflection at the inner side face of the outer peripheral face 2a. The confined excitation lights are introduced into the laser fiber 1 through portions contacted with the glass cylindrical member 2, thereby causing excitation.
Claims23
A fiber laser device comprising:
- an optical fiber which has a core containing a laser active material, and in which laser light is output from an end portion by exciting said active material;
- an excitation light source which generates excitation light for exciting said laser active material;
- and
- a structural member which can confine the excitation light,
- at least a part of a side face of said optical fiber being contacted with said structural member directly or indirectly via an optical medium, said active material being excited by excitation light incident through the contacted portion.
An optical fiber laser device comprising:
- an optical fiber has a core containing a laser active material, and an outer layer surrounding said core, and in which laser light is output from an end portion of said optical fiber by supplying excitation light to said core, wherein
- at least a part of said optical fiber is surrounded by an optical mediumso that in a section of said optical medium perpendicular to an optical axis of said optical fiber, plural optical axes of said optical fiber are included within said optical medium, and, in at least a part of a portion surrounded by said optical medium, a refractive index of said outer layer of said optical fiber with respect to excitation light is increased as moving from an outermost portion of said outer layer to an interface between said outer layer and said core, and
- excitation light introduced into said optical medium excites, via said optical medium, said active material contained in said core of said optical fiber in said optical medium, thereby generating laser light.
An optical fiber laser device comprising:
- an optical fiber has a core containing a laser active material;
- an outer layer that is disposed around said core and that guides excitation light for exciting said laser active material, and in which said laser active material in said core absorbs the excitation light guided by said outer layer, thereby emitting laser light from an end portion of said optical fiber;
- and
- at least one excitation light incident port through which excitation light is incident on said outer layer, formed in a side face of said optical fiber so as to prevent the laser light from leaking, and guide the excitation light through said excitation light incident port to excite said laser active material.
Dependencies are inferred from the claim text.