Optical device and laser device

Abstract

Provided is an optical device that can suppress deterioration of resin that fixes optical fibers. An optical combiner 20 is provided with: an input-side optical fiber 12; an output-side optical fiber32; a fiber connection part 53 at which a core 63 of the input-side optical fiber 12 and a core 73 of the output-side optical fiber 32 are connected to each other; a fiber support part 54 that supports optical fibers 12, 32; and fixing resins 81, 82 that respectively fix the optical fibers 12, 32 to the fiber support part 54. The input-side optical fiber 12 has a taper part 66 including a taper start section 64 and a taper body 67 that becomes smaller in diameter from the taper start section 64 toward the fiber connection part 53. The core 73 of the output-side optical fiber 32 has a core exposure area 74 exposed to the outside of the input-side optical fiber 12. The fixing resin 81 is located on a side that is close to an optical axis 90 of the output-side optical fiber 32 relative to a reference line L1 obtained by extending a line passing through the point on the outer peripheral profile line 65 closest to the optical axis 90, among lines each drawn from a point on an inner side profile line 75 for defining the core exposure area 74 to a point on an outer peripheral profile line 65 of the taper start section 64 without colliding with the taper body 67.

Description

Technical field [0001] The present invention relates to an optical device and a laser device using it, and more particularly to an optical device having an optical fiber connection portion connected to each other. Background technique [0002] In recent years, in the field of laser processing using fiber laser, by increasing the output of laser light, it is expected to improve the processing speed, the processing of thicker materials, so the high output of laser light is pursued. In order to increase the output of the laser, the output light from the plurality of laser sources is synthesized, or an excitation light from a plurality of excitation light sources is introduced into a laser resonator. At this time, a plurality of optical combiner and 1 fiber is sometimes connected to the optical combiner ( For example, refer to Patent Document 1). [0003] figure 1 It is a perspective view schematically showing such a conventional optical combiner. in figure 1 In the optical combin...

AI Technical Summary

Problems solved by technology

Such reflected light and pumping light radiated to the outside space may also irradiate the resin fixing the input-side optical fiber 901, which may cause deterioration of the resin and further cause failure of the optical combiner.

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