Patent ID: 9190802
Filing Date: 2015-11-17
Classification: H01S

Abstract:
1. An optical fiber laser device comprising: an amplification optical fiber; a pumping light source outputting a pumping light making the amplification optical fiber be subjected to optical pumping; optical reflectors being disposed at two sides of the amplification optical fiber and configuring an optical resonator making laser oscillation of an invisible laser light from a light generated in the amplification optical fiber; an output optical fiber guiding the laser light and outputting the laser light to outside; a first visible light source outputting a visible light; an introduction unit having at least first and second input terminals and a first output terminal, the introduction unit having wavelength characteristics of outputting the laser light input to the first input terminal from the first output terminal mainly and outputting the visible light input to the second input terminal from the first output terminal mainly, the introduction unit making the visible light output by the first visible light source input from the second input terminal and introducing the visible light to the amplification optical fiber or the output optical fiber via the first output terminal; an optical multiplexer/demultiplexer connected to the first visible light source and connected to the second input terminal of the introduction unit, the visible light output by the first visible light source being input to the optical multiplexer/demultiplexer, the visible light being output to the introduction unit, the optical multiplexer/demultiplexer outputting a leaking return light input from a side of the introduction unit; and a controller driving the first visible light source to output the visible light from the output optical fiber in a case of determining a position on a workpiece, at which the laser light will be irradiated.