Integrated optical fiber laser

Abstract

The invention provides an integrated optical fiber laser, which comprises a cooling column, a pump module and a gain optical fiber, wherein the cooling column comprises a cooling column main body in a hollow cylinder shape or a hollow truncated cone shape; cooling liquid is filled in the cooling column main body; the pump module is arranged on the surface of a hollow part of the cooling column main body, connected with a power supply and used for generating pump laser; and the gain optical fiber is wound on the outer surface of the cooling column main body, connected to the output end of the pump module through a highly-reflective optical fiber grating, connected to the output end of the integrated optical fiber laser through a lowly-reflective optical fiber grating and used for converting to the gain wave length and oscillatorily outputting on the pump light which is generated by the pump module. The integrated optical fiber laser has the advantage that by fully utilizing the surfaces of the cooling column, including the inner surface and the outer surface, the heat dissipation capacity of a high-power optical fiber laser can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to an integrated fiber laser. Background technique [0002] Fiber laser has become a research hotspot in recent years due to its advantages of low threshold, high efficiency, full solidification, and compact structure. All-fiber lasers, from laser generation to laser transmission, are all carried out in soft optical fibers, thus showing many significant advantages. In material processing and processing, industrial manufacturing, pumping, medical and other applications, all-fiber lasers Taking advantage of more and more advantages, the demand for fiber lasers is now developing towards high power, miniaturization, and portability. [0003] Compared with traditional solid-state lasers, fiber lasers have a large surface area to volume ratio, and can effectively dissipate heat when the power is not high. However, as the output power continues to increase, thermal effects will seriously r...

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Problems solved by technology

[0003] Compared with traditional solid-state lasers, fiber lasers have a large surface area to volume ratio, and can effectively dissipate heat when the power is not high. However, as the output power continues to increase, thermal effects will seriously restrict the output power and beam quality of fiber lasers. Therefore, the thermal effect is one of the factors that must be considered for high-power fiber lasers

[0004] Excessive heat generated inside the fiber laser seriously affects the normal operation of the laser, and even destroys the fiber optic device, such as the stress and refractive index changes caused by the thermal expansion of the matrix material, the thermal aging of the fiber cladding, and finally bursting may occur

Severe thermal effects make miniaturizing high-power fiber lasers difficult

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