Beam splitting amplification quasi-continuous fiber laser

Abstract

The invention discloses a beam splitting amplification quasi-continuous fiber laser, belongs to the technical field of laser, and aims to solve the problems of high preparation difficulty and poor laser stability under the condition of high repetition frequency in the prior art. Controlled devices of a seed laser of the laser are respectively connected with corresponding ports of a centralized control unit; the input end of the beam splitter I is connected with the output end of the seed laser; light path input ends of the plurality of light path amplification stages are respectively connected with an output end of the beam combiner, light path amplification stage controlled devices are respectively connected with corresponding ports of the centralized control unit, and pump pulses of the plurality of light path amplification stages are consistent with the seed laser in repetition frequency and pulse width. The parameters of each path can be subjected to time delay adjustment according to a real-time power detection result; the input end of the beam combiner is respectively connected with the light path output ends of the plurality of light path amplification stages; and the light path input end of the laser output structure is connected with the output end of the beam combiner. The method can be applied to the fields of non-metallic material processing, medical cosmetology, mid-infrared laser pumping and the like.

Description

technical field [0001] The invention relates to a beam splitting and amplifying quasi-continuous fiber laser, which belongs to the field of laser technology and can be applied to the fields of non-metallic material processing, medical cosmetology, mid-infrared laser pumping and the like. Background technique [0002] Compared with solid-state lasers and gas lasers, fiber lasers are widely used in industrial processing, military, medical, sensing and other fields due to their outstanding advantages such as high integration, good beam quality, high energy conversion rate, and easy adjustment of parameters. Continuous fiber laser is an important type of fiber laser. Compared with continuous lasers, quasi-continuous fiber lasers can provide microsecond to millisecond pulse lasers; compared with Q-switched fiber lasers, quasi-continuous fiber lasers have higher single pulse energy and average power. In welding, cutting and other processing fields, the repetition rate and average...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of difficult preparation and poor stability of lasers under high repetition frequency conditions in the prior art, the present invention provides a beam splitting and amplifying quasi-continuous fiber laser, which adopts low-magnification amplification, and at the same time amplifies the same seed light through multiple amplification-level optical paths. Carry out synchronous amplification, and then simply combine the beams through the beam combiner to increase the average power and repetition rate of the laser, and maintain better beam quality

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