Microchannel cooling device of kilowatt level optical fiber laser

Abstract

The invention relates to a device used for cooling of a kilowatt level optical fiber laser. A microchannel cooling device of the kilowatt level optical fiber laser is characterized by comprising an inner refrigerator and an outer refrigerator, wherein the outer refrigerator is sheathed on the inner refrigerator; when in use, the optical fiber laser is positioned between the inner refrigerator andthe outer refrigerator, and the optical fiber laser is wound on the inner refrigerator and is contacted with the outer refrigerator; the outer refrigerator and the inner refrigerator are connected byscrews; and the inner refrigerator and the outer refrigerator are made of metal. The device is characterized by even heat dissipation, obvious refrigerating effect and strong practicability and the like.

Description

technical field [0001] The invention relates to a cooling device for a kilowatt-class fiber laser. Background technique [0002] Since E. Snitzer and others proposed the concept of double-clad fiber in 1988, fiber lasers based on this cladding pumping technology have achieved rapid development. In 2007, the single-fiber output power has reached 3kW, and the multi-fiber coupling technology has been used to complete tens of thousands of watts of fiber lasers in the laboratory. [0003] Compared with traditional solid-state lasers, high-power double-clad fiber lasers have a large surface area to volume ratio, and can effectively dissipate the heat deposited by pumping light when working at low power. However, as the output power continues to increase, especially when the laser output reaches the kW level, the thermal diffusion of the matrix material will cause stress and changes in the refractive index. Due to heat deposition, the temperature in the doped fiber core will incre...

AI Technical Summary

Problems solved by technology

However, as the output power continues to increase, especially when the laser output reaches the kW level, the thermal diffusion of the matrix material will cause stress and changes in the refractive index. Due to heat deposition, the temperature in the doped fiber core will increase and the quantum efficiency will decrease. , the output wavelength changes, and even lead to matrix melting, fiber end face damage, burning of the fiber side incision, and fiber side burning, so that the fiber laser cannot work normally

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