Laser

Abstract

The invention discloses a laser which comprises a laser output module used for outputting laser, a visible light frequency multiplier connected with the laser output module and used for receiving laser and converting part of the laser into visible light, and a laser output end connected with the visible light frequency multiplier and used for receiving and outputting the laser not converted and the visible light, wherein the visible light is used as guiding light. According to the scheme, the visible light frequency multiplier can convert part of laser into visible light, the visible light and the laser are output from the laser output end, the focus point of the visible light on a target is the focus point of the laser on the target, a laser guiding function is achieved, there is no need to couple a visible light path in the laser, generation of a visible light path is avoided, and the cost of the laser with a visible light-based guiding function is reduced. In addition, the visible light acquired by the visible light frequency multiplier through conversion is not affected by an ytterbium-doped fiber in the laser output module, and the visible light is of high brightness and good guiding performance.

Description

technical field [0001] The invention relates to the technical field of laser processing, in particular to a laser. Background technique [0002] The wavelength band of the laser output by the laser is 1060-1080nm. When the laser in this band is usually invisible, it is difficult to judge whether the laser output by the laser is on the target when controlling the laser in this band to mark or cut the target. The position of the focus point, so that accurate marking or cutting cannot be achieved. [0003] In order to conveniently judge the position of the focal point of the laser output by the laser on the target, in the prior art, a red semiconductor light source is usually added inside the laser, and the red light emitted by the red semiconductor light source is coupled into the optical path of the laser , output through the collimated output of the laser, such as figure 1 shown. Since red light is visible light, it can guide laser light, but the inventors of the present ...

AI Technical Summary

Problems solved by technology

[0004] 1. When the red light is coupled into the optical path of the laser, at least one red light coupling point needs to be added to the beam combiner of the laser, so when the beam combiner is manufactured, an additional coupling arm for red light coupling should be added to make the beam combiner The coupling arm is changed from the original N*1 structure to (N+1)*1, and the coupling efficiency of the pump light and the red light of the laser must be taken into account, which increases the difficulty and cost of the beam combiner

[0005] 2. The power of red light is generally not high, and when the red light passes through the ytterbium-doped fiber of the laser, it will be absorbed by the ytterbium-doped fiber, and the power of the red light will be severely reduced, so the output red light is not bright enough and has poor guidance

[0006] 3. The fiber of the optical path of the red light relative to the laser is a cut-off light wave, and its transmission is a high-order mode. After the red light passes through the beam combiner, most of the energy will be concentrated in the fiber cladding, the transmission loss is large and the light diverges, and the guiding intensity is weak. And the guide position deviation is large

[0007] 4. After the red light is coupled to the optical path of the laser, it is easily affected by the backward high-power laser. It is necessary to add a red light protector to increase the cost. In addition, the red light semiconductor laser that outputs red light is also easily affected by temperature changes, and the work is unstable.

[0008] 5. Red semiconductor lasers require additional circuit drive, which increases the cost

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