Incoherent beam combination-based high-energy nanosecond pulse all-fiber laser

Abstract

The invention relates to technical fields of optical fibers and laser, and specifically relates to an incoherent beam combination-based high-energy nanosecond pulse all-fiber laser. The incoherent beam combination-based high-energy nanosecond pulse all-fiber laser is characterized by comprising a nanosecond pulse seed laser, an optical fiber beam splitter, optical fiber amplifiers, synchronous optical paths, an optical fiber beam combiner and a laser output end, wherein the output end of the nanosecond pulse seed laser is connected with the input end of the optical fiber beam splitter; the corresponding optical fiber amplifiers are arranged at the output ends of the sub paths of the optical fiber beam splitter respectively; the optical fiber beam splitter is used for performing branching on an optical signal from the nanosecond pulse seed laser, and then performing amplification on each sub path optical signal of the optical fiber beam splitter separately; the output ends of the sub paths of the optical fiber beam splitter are connected with the input ends of the corresponding optical fiber amplifiers; the output ends of the optical fiber amplifiers are connected with the input end of the optical fiber beam combiner through the synchronous optical paths separately; and the output end of the optical fiber beam combiner is connected with the laser output end. The incoherent beam combination-based high-energy nanosecond pulse all-fiber laser has the advantages of high average power, high pulse energy, small size, easy maintenance, stability, reliability and the like.

Description

technical field [0001] The invention relates to the field of optical fiber and laser technology, in particular to a high-energy and high-average-power nanosecond pulse all-fiber laser based on incoherent beam combining. Background technique [0002] Fiber laser / amplifier is a laser / amplifier with fiber doped with rare earth elements as the gain medium. By doping different rare earth elements, such as erbium (Er), 镒 (Yb), thulium (Tm), holmium (Ho), neodymium (Nd), etc., the working band of fiber laser / amplifier covers from ultraviolet to mid-infrared. Compared with other lasers / amplifiers, fiber lasers / amplifiers have distinctive features such as high energy conversion rate, good output beam quality, compact and stable structure, no need for optical path adjustment, good heat dissipation performance, long life and no maintenance, so they have been rapidly developed and widely used. ground application. [0003] In recent years, high-power nanosecond pulsed all-fiber lasers ...

AI Technical Summary

Problems solved by technology

Therefore, the existing high-power nanosecond pulse all-fiber laser products cannot be applied to the laser cleaning industry with a huge market

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