Helium-neon laser treatment device and manufacturing method thereof

Abstract

A helium-neon laser treatment device and a preparation method thereof, comprising 2 to 6 flat helium-neon laser tubes placed in parallel, after the laser output from the laser tubes is reflected by a group of 45° plane mirrors, the reflected beams are parallel and close together, and enter the A fiber coupler composed of a body, a lens, a fiber positioning socket and a fiber plug inserted into the fiber positioning socket. One end of the fiber plug is connected to an optical fiber. The main discharge circuit in the laser power supply is composed of a voltage doubler circuit and a high-voltage current stabilization circuit. The invention couples multiple laser beams to the output of the quartz optical fiber with a core diameter less than 0.6mm, and irradiates the lesion for treatment. This helium-neon laser treatment device is easy to use, stable and reliable in operation, high in output power and high in coupling efficiency.

Description

technical field [0001] The invention relates to a helium-neon laser medical device, in particular to a laser medical device using a flat discharge tube helium-neon laser as a light source. Background technique [0002] With the development of laser medicine, especially the development of laser physiotherapy and photodynamic therapy, a higher power He-Ne laser with a wavelength of 632.8nm is required. The output power of a general He-Ne laser treatment device is about 20-30 milliwatts. In order to solve the helium-neon laser therapeutic apparatus that can output hundreds of milliwatts, the invention patent "focused high-power helium-neon laser therapeutic Multiple) general helium-neon laser tubes are combined, and a fiber coupler is glued to the laser output mirror of each laser tube, so that the laser energy output by the laser tube is converged (also called coupling) into a very thin Optical fibers (about a few tenths of a millimeter straight), these optical fibers are twi...

AI Technical Summary

Problems solved by technology

[0005] 1. Commercially available 1-meter-long, 30-40 mW He-Ne laser tubes output mostly multi-mode outputs, and they need to be coupled to optical fibers with a core diameter of 0.08-0.3 mW, and the coupling efficiency is low, that is, the loss is large

[0006] 2. The coupler is fixed on the output reflector of the laser tube with adhesive. The former is metal and the latter is glass. The expansion coefficients of the two are very different. It is easy to fall off after long-term use, especially the high temperature inside the machine will affect the work. reliability

[0008] 4. The multi-strand optical fiber output is coupled to the single-strand optical fiber output through the "recoupler", the coupling efficiency is lower, and the thick single-strand optical fiber is hard, which is very inconvenient for users to use

[0009] 5. The output end of the multi-strand optical fiber is optically cold-processed. When the optical fiber enters the body, due to the pollution of body fluids under the action of high power density, the laser output is severely attenuated, and the user cannot reprocess it.

[0010] 6. The multi-strand optical fiber with a coupling head has a high probability of damage. As long as one of the dozens of optical fibers is damaged, the entire optical fiber transmission system needs to be replaced, and the cost of this special optical fiber transmission system is very high.

[0011] 7. There are a lot of laser tubes in the machine (10~20, including spare laser tubes), and the life of the laser tube is limited, so the probability of failure of the whole machine is very high

The high-voltage step-up transformer in this circuit is often damaged due to the influence of factors such as climate, environment, and interlayer insulation strength, and the high-voltage step-up transformer has a large working noise

When the voltage of the mains power grid changes by 10% in this circuit, the working current of the laser tube will change by about 30%. This is because the voltage drop of the laser tube changes very little when the current changes. Generally speaking, the voltage on the current limiting resistor The drop is about half of the voltage drop of the laser tube, so the output power of the laser tube is easy to change significantly with the change of the mains grid voltage

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