Laser device

Abstract

This laser device is equipped with: at least one light source; a delivery fiber that propagates laser light emitted from the light source; a monitor fiber that is optically coupled to the delivery fiber, and propagates a portion of light that is to be propagated in the opposite direction from the direction of laser light propagated in the delivery fiber; and a light reception unit that receives the light propagated by the monitor fiber. The light reception unit detects first light that is in the visible light wavelength band.

Description

technical field [0001] The present invention relates to laser devices. [0002] This application claims the priority of Patent Application No. 2019-034375 filed in Japan on February 27, 2019, and the contents thereof are hereby cited. Background technique [0003] In a laser device, a phenomenon called "fiber fusing" is known in which the core of the optical fiber is damaged toward the light source when the optical fiber burns out. When the optical fiber is fused, components present between the location where the optical fiber is fused and the light source are damaged. [0004] In recent years, along with the increase in output of laser light, the progress rate of fiber fusing has also increased, and when fiber fusing occurs, the area that is damaged in the device tends to increase. Patent Document 1 describes a technique of monitoring visible light emitted from a core heated to a high temperature when an optical fiber is fused with an optical receiver arranged on the side...

AI Technical Summary

Problems solved by technology

In addition, in the optical circuit leading to the light source, it is difficult to predict where the fiber will be fused

It is conceivable to arrange a plurality of optical receivers over the entire length of the optical circuit, but this requires a corresponding space, so the size of the device is increased, and the circuit is complicated, resulting in an increase in cost

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