Single mode output laser for spiral coupling active doping optical fibre stick

Abstract

The invention discloses a spiral coupling rare-earth-doped optical-fiber rod single-mode output LASER, comprising a pumping source (1) and a pumping source (2), a single-mode rare-earth-doped optical-fiber (6) and a rare-earth-doped optical-fiber rod. The pumping source (1) pumps the LASER composed of a fiber grating (71), a fiber grating (72) and the single-mode rare-earth-doped optical fiber (6); the pumping source (2) pumps the rare-earth-doped optical-fiber rod, and the fiber grating (71), the fiber grating (72) and the single-mode rare-earth-doped optical-fiber (6) are connected, and placed in the spiral groove prepared on a rare-earth-doped optical-fiber coating (3), wherein, the partial or complete coating of the fiber grating and single-mode rare-earth-doped optical-fiber placed in the groove is removed, and the groove is encapsulated. The two end faces of the rare-earth-doped rod is treated smooth, and by internal strong coupling, the resonance of rare-earth-doped optical-fiber rod realizes active phase-lock on the laser-wave length generated by the LASER composed of the optical-fiber grating and the single-mode rare-earth-doped optical fiber, thereby, single-mode laser ultra-brightness power output is realized.

Description

technical field [0001] The invention relates to a high-power fiber laser, in particular to a helically coupled active doped fiber rod single-mode output laser. Background technique [0002] With its excellent performance and low price, fiber laser has been widely used in optical fiber communication, industrial processing, medical treatment, military and other fields. Although a single-mode laser with a single fiber output exceeding 1kW has been achieved in the laboratory, and the realization of this laser requires strict conditions, it is difficult for engineering applications; but with the development of laser technology applications, as well as material processing, space communications, laser radar, optoelectronics The development of countermeasures and laser weapons requires high-power, high-quality, high-intensity and ultra-brightness lasers, and requires single-mode output power to reach MW or even GW levels. Double-clad rare-earth-doped fiber lasers that only use sing...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the limited output single-mode laser power of the existing traditional double-clad single-mode fiber lasers and the deterioration of the output beam quality and poor heat resistance as the optical power increases, and the single-mode It is difficult to write the grating in the fiber core, and the pump light is coupled into the double-clad fiber with low efficiency. The present invention provides a single-mode output laser with spirally coupled rare earth-doped fiber rod to achieve high-power ultra-brightness single-mode laser output.

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