Fiber laser output head and manufacturing method thereof

Abstract

The invention provides a fiber laser output head, comprising a quartz end cap 4, a laser energy transmission fiber 6, a metallic sheath 7 and a quartz sleeve 8, wherein the quartz end cap 4 is in tight fit with the front end of the quartz sleeve 8, the laser energy transmission fiber 6 is provided with a section of clad light stripper 5, the clad light stripper 5 is fused with the quartz end cap 4 and fixed in the quartz sleeve 8 in a sealed mode, the quartz sleeve 8 is fixed in the metallic sheath 7 in a sealed mode, and the metallic sheath 7 is provided with a water inlet 9, a water outlet 10 and a clearance for connecting cooling water and communicating the water inlet 9 with the water outlet 10. According to the fiber laser output head, the clad light stripper arranged on the laser energy transmission fiber can eliminate residual pumping light and reflected light on a quartz end face; the clad light stripper is sealed in the quart sleeve to effectively avoid direct contact with cooling water and then prevent impurities in the water from being adsorbed to the fiber, thus solving the problem that the fiber is burnt out because the impurities absorb heat.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a high-power fiber laser output head and a manufacturing method thereof. Background technique [0002] Due to the advantages of good beam quality, high light-to-light conversion efficiency, small size, maintenance-free, and high stability, fiber lasers are widely used in industrial, medical, and national defense fields. With the continuous development of fiber laser technology, the output power of fiber lasers is getting higher and higher. When transmitting high-power lasers, due to the small core diameter of the double-clad fiber, the power density of the output end of the fiber is very high. Any small Defects and dirt can burn out fibers. [0003] In order to solve this problem, a quartz end cap is usually fused at the output end of the fiber to increase the output spot and reduce the energy density of the output spot. Specifically, the quartz end cap and part of the optical f...

AI Technical Summary

Problems solved by technology

However, this method uses the direct contact between the optical fiber and the cooling water to dissipate heat, and has high requirements on water quality, and after long-term use, the scale will be adsorbed and accumulated on the bare fiber, resulting in the inability to discharge the heat, thus burning the laser output head or laser

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