Discharge Tubes for Axial Fast Flow Gas Lasers

Abstract

The invention provides a discharge tube for a fast axial-flow gas laser. The discharge tube comprises an air inlet pipe portion, a bulge structure, a secondary mixing structure, a straight tube portion and a gas outlet which are successively connected through an air passage. The air inlet pipe portion is provided with an anode; the gas outlet is provided with a cathode; and the radial dimension of the secondary mixing structure is greater than the radial dimension of the straight tube portion. According to the discharge tube for the fast axial-flow gas laser, the side, which is provided with a pre-ionization electrode, of a vertical pipe is removed on the basis of a cross bulge type discharge tube to reduce the resistance of gas in the bulge structure, the outlet of the bulge structure is additionally provided with the secondary mixing structure, and the radial dimension of the secondary mixing structure is greater than the radial dimension of the straight tube portion so that work gases which are not completely mixed in the bulge structure can be further mixed in the secondary mixing structure, thus the uniformity of gas speed distribution and turbulent flow distribution is improved.

Description

Technical field [0001] The invention relates to the field of structural design of laser devices, in particular to a structural design of a discharge tube used for axial fast flow gas lasers. Background technique [0002] The discharge tube is one of the core components of the resonant cavity of the axial fast flow laser, and its inlet and outlet are respectively provided with an anode and a cathode. When the laser is working, there is a DC high voltage between the two poles of the discharge tube, and the working gas is driven by the gas circulation pump to quickly pass through the discharge tube. The gas forms a glow discharge in the discharge tube, and part of the discharge power is converted into laser power output. A large part is converted into heat energy that heats up the gas. The velocity distribution, turbulence distribution and gas flow rate of the gas in the discharge tube during discharge greatly affect the uniformity and stability of the discharge, which in turn affe...

AI Technical Summary

Problems solved by technology

In addition, at the initial stage when the working gas enters the straight pipe 31, there are still disadvantages of uneven velocity distribution and turbulence intensity distribution.

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