Four-path incoherent co-beam MOPA high-capacity laser system

Abstract

The invention relates to a laser system for four incoherent combined beams MOPA with high power. The laser system is composed of a main oscillation system, a PCM power amplifying system and a reflecting prism, wherein the main oscillation system comprises an oscillator 10, beam splitters 11, 12 and 13 and a main total reflection plane mirror 14; the PCM power amplifying system comprises four amplifying systems 2-1, 2-2, 2-3 and 2-4; each amplifying system is an optical system composed of an SBS phase-conjugation mirror, a convex lens, two amplifiers, a rotator, polarization beam splitters and auxiliary total reflection plane mirrors; optical axes are symmetrically distributed in the positions of the four edges of a rectangular prism; each auxiliary total reflection plane mirror respectively forms an included angle of 45 degrees with the optical axes; each beam splitter is respectively opposite and orthogonal to each polarization beam splitter; each auxiliary total reflection plane mirror is respectively arranged opposite and in parallel to corresponding edge plane total reflection mirrors 31, 32, 33 and 34; and four incoherent laser combined beams. The laser system has the advantages of high laser output power and good beam quality, and is applied in the military field, the industrial field and the like.

Description

technical field [0001] The invention belongs to a laser output system, specifically a four-way incoherent beam combining MOPA (master oscillator) with high beam quality and high power laser output based on the SBS (stimulated Brillouin scattering) waveform distortion compensation principle - power amplification) high power laser system. Background technique [0002] We know that at present, incoherent beam combining MOPA systems based on the SBS principle mostly use two-way power amplification systems to obtain two beams of polarized light whose polarization directions are perpendicular to each other, and then superimpose and combine the two beams of incoherent light, but use polarizers There is a disadvantage of beam combining, that is, the maximum beam combining laser is two beams. At present, the reported MOPA polarization beam combining system using SBS has an average output laser power of 500W, but it is very difficult to continue to increase the output power. The pat...

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Problems solved by technology

[0002] We know that at present, incoherent beam combining MOPA systems based on the SBS principle mostly use two-way power amplification systems to obtain two beams of polarized light whose polarization directions are perpendicular to each other, and then superimpose and combine the two beams of incoherent light, but use polarizers There is a disadvantage of beam combining, that is, the maximum beam combining laser is two beams

At present, the reported MOPA polarization beam combining system using SBS has an average output laser power of 500W, but it is very difficult to continue to increase the output power

The patent of "Four-way Incoherent Beam Combining MOPA Laser System" previously applied by the applicant, the application number is 2006100444563, part of the content stated in the original specification is unclear and cannot be realized

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