High-power fiber laser prostate therapy system

Abstract

The invention discloses a high-power fiber laser prostate therapy system. The high-power fiber laser prostate therapy system comprises a laser resonant cavity, a pumping source, a gain fiber, an electro-optical Q-switch device and an optical fiber coupling lens; the gain fiber comprises gain fiber cores, an air wedge, and an inner wrapping layer, an outer wrapping layer and a strengthened coat layer which coat the fiber cores and air wedge in sequence from the inside to the outside, the number of the gain fiber cores is larger than 1, the gain fiber cores are parallel to the central axial line of the gain fiber, the air wedge uses a thin strip-shaped hollow structure, and one end of the air wedge is located at the circle center of the inner wrapping layer while the other end is located at the edge of the inner wrapping layer. The high-power fiber laser prostate therapy system uses the special multi-core gain fiber structure, the fiber cores are symmetrically distributed in a non-rotating mode, the special air wedge design breaks the circular symmetry of the optical fiber, the power limit of the single-fiber core fiber laser is overcame, the pumping efficiency of the laser is increased, and the output power of the laser is greatly improved.

Description

technical field [0001] The invention relates to the technical field of fiber lasers, in particular to a high-power fiber laser prostate treatment system. Background technique [0002] Benign prostatic hyperplasia (benign prostatic hyperplasia, BPH) is a common and frequently-occurring disease in elderly men, and its incidence gradually increases with age, reaching more than 50% at the age of 60 and reaching 83.3% at the age of 80. There are a large number of patients in urgent need of treatment all over the world, and it is obvious that the development of a prostate therapeutic instrument is promising and meaningful. At present, transurethral resection of the prostate is still considered the gold standard for minimally invasive treatment of BPH, but it is prone to serious complications such as bleeding and resection syndrome after operation. [0003] The 2μm band is very close to the absorption peak of water at 1.94um, and its absorption rate for water is 4 times that of th...

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Problems solved by technology

[0006] Another object of the present invention is to provide a high-power fiber laser prostate treatment system, which can solve the problem of beam quality deterioration of single-core fiber lasers in order to increase power, and the multi-fiber cores in the cladding are formed around the gas wedge. Rotationally symmetrical distribution improves the probability of pump light passing through the gain fiber core, thereby greatly increasing the pumping efficiency of the laser, and achieving higher power output on the premise of ensuring better beam quality

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