Super-pulse solid thulium laser

Abstract

A super-pulse solid thulium laser comprises a resonant cavity, one end of the resonant cavity is closed, and the other end of the resonant cavity is communicated with a coupler; a high-reflectivity mirror, an acousto-optic Q-switch, a thulium rod, a high lens and a focusing mirror are coaxially and fixedly arranged in the resonant cavity; an LD semiconductor palladium strip for projecting a lightsource to the thulium rod is arranged at the periphery of the thulium rod, and the thulium rod and the LD semiconductor palladium strip are connected with a power supply; one end of the thulium rod isprovided with the acousto-optic Q-switch, and the other end of the thulium rod is provided with the high lens, the focusing lens and the coupler; and the other end of the acousto-optic Q-switch is provided with the high-reflectivity mirror. The thulium rod and the LD semiconductor palladium strip jointly emit the light source, the light source is amplified by the resonant cavity to form laser with the power dozens of times higher than the output power, and the pulse thulium laser is obviously superior to a pulse holmium laser in the prior art in the aspects of improving the pulse frequency, the pulse peak value and the tissue absorptivity.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a laser surgery device, in particular to an ultra-pulse solid-state thulium laser. Background technique [0002] Lasers are widely used in the fields of national defense, medical treatment, and biological research, especially in the fields of laser cutting and lithotripsy; current lasers mostly use pulsed holmium lasers for surgical cutting and lithotripsy, but pulsed holmium lasers The maximum frequency of the pulse is only 80HZ, and the pulse peak value and tissue absorption rate are relatively low, which will directly lead to: 1. Low pulse frequency, prolonging the operation time; 2. Low pulse peak power makes hard or large stones unable to be completely crushed; 3. 1. The low absorption rate of tissue leads to increased power consumption, large power consumption and poor surgical effect. [0003] After searching the published patents, it is found that the followi...

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Problems solved by technology

[0004] 1940nm thulium-doped all-fiber laser and medical device based on the laser (CN109950781A) discloses a 1940nm thulium-doped all-fiber laser and a medical device based on the laser, which relate to the field of optical fiber medical technology. Problems of low output power, large size, poor stability and poor heat dissipation. Lasers include semiconductor lasers, beam combiners, high reflection gratings, two sections of thulium-doped fibers, low reflection gratings, reverse beam combiners, and reverse pumps The laser, the cladding light stripper, the first optical fiber output head, the optical fiber water cooling plate and the refrigerant refrigeration equipment have achieved a high-power laser output of 300W through a good cooling and heat dissipation structure and high-quality optical fiber fusion splicing technology; medical devices include the above-mentioned lasers , also includes drive equipment, power conversion module, second optical fiber output head, optical fiber coupling connection device and medical optical fiber. The direct coupling method is adopted between the laser and the medical optical fiber to achieve high coupling efficiency; stone and cutting tissue

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