A laser treatment system using thulium-doped optical fiber

Abstract

The invention provides a laser treatment system applying thulium-doped optical fibers. A mechanism that the heat conductivity coefficient of a material is increased along with the reduction of the concentration of doped ions is adopted, and a low-doping heat conduction channel is established in a laser device gain optical fiber and is used for accelerating heat dissipation, so that heat is prevented from being accumulated at the center of a fiber core, a thermal lens effect is effectively prevented, light damage to the material are reduced and the output beam quality and the output power are improved; furthermore, a cooling system is improved and is formed through adopting a plurality of sub-parts with independent liquid circulating channels, so that a condition that heat is accumulated ina cooling liquid flowing process, resulting in excessively high the temperature of the optical fibers is effectively prevented; an end constraint of the optical fibers is prevented and the probability that the optical fibers are burnt down when the partial temperature is too high is effectively reduced; efficient heat dissipation of the optical fibers with high heat power density is realized andpowerful support is provided for higher power output of an optical fiber laser device.

Description

technical field [0001] The invention relates to the technical field of laser therapy, in particular to a laser therapy system using a thulium-doped optical fiber. Background technique [0002] The 2μm laser is called "eye-safe" laser, and has broad prospects in medical surgery, atmospheric monitoring, lidar, remote sensing and other fields. With the development of optical fiber manufacturing technology, fiber lasers based on optical fibers have made significant progress in reducing threshold, oscillation wavelength range, and wavelength tunable performance. Among them, single-frequency fiber laser has many advantages such as long output coherence length, low noise, and compact structure. It has a very broad application prospect in the fields of coherent optical communication, atom trapping, nonlinear frequency conversion, and high-precision spectral measurement. [0003] Thulium-doped fiber laser is a new type of high-power laser, which uses thulium-doped silica fiber as th...

AI Technical Summary

Problems solved by technology

The melting of the fiber core is due to the accumulation of heat, which makes the temperature of the fiber core reach the melting temperature of quartz, causing the fiber core to melt and lose the ability to transmit light.

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