Closed-loop discharge-excited pulsed repetition-frequency gas laser and its operating method
A technology of gas lasers and excitation pulses, which is applied to lasers, laser components, electrical components, etc., can solve problems such as window glass pollution, and achieve the effect of simplifying the structure and preventing pollution
Active Publication Date: 2019-09-27
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology
[0003] In order to solve the problem of window glass pollution of discharge excitation pulse repetition frequency gas laser, the present invention provides a self-cleaning optical window based on the principle of electrostatic dust removal and closed-loop discharge excitation pulse repetition frequency gas laser
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[0041] Such as figure 1 As mentioned above, in the closed-loop discharge excitation pulse repetition frequency gas laser, the laser body 1 adopts a stainless steel metal frame with a size of 700mm×180mm×80mm, and a nylon plate 8 is installed on one side as the connection end of the laser pulse discharge pumping source 5 . Two self-cleaning optical windows 2 are installed at both ends of the laser body 1 respectively, and together with the laser body 1 constitute a laser chamber. The pulse discharge pumping source 5 is connected to the nylon plate, and is used to provide the laser with repetitive high-voltage pumping pulses. The resonant cavity 3 is used to form laser oscillation in the cavity to realize laser output. It is composed of a pair of optical lenses with a diameter of 50 mm. The front mirror partially transmits the output laser, and the rear mirror fully reflects the output laser.
[0042] Such as figure 2 As mentioned above, the gas circulation device 4 is connec...
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The invention discloses a closed-cycle discharge excited pulse repetition-frequency gas laser based on the principle of electrostatic precipitation and provided with a self-cleaning optical window and an operation method of the closed-cycle discharge excited pulse repetition-frequency gas laser. The closed-cycle discharge excited pulse repetition-frequency gas laser comprises a main laser body, a pulse discharge pump source, a resonant cavity, the self-cleaning optical window, a gas circulation device, a gas supply unit and a vacuum unit, wherein the self-cleaning optical window comprises an optical window cleaner and a window; the optical window cleaner comprises a baffle box, gas pipes and a gas filter; the gas filter based on the principle of electrostatic precipitation comprises a square outer chamber, a gas inlet, multiple layers of metal nets, an electrostatic precipitation ionization region, an electrostatic precipitation collection region, an ash hopper, a tail-end filter screen, a gas outlet and a high-voltage direct-current power supply. During operation of the laser, certain flow of working gas is introduced out of a fan outlet of the gas circulation device, a large quantity of particles produced by previous pulse discharge is removed by the gas flow in the gas filter through electrostatic precipitation and two-stage filtering, the gas is changed into clean working gas and sent to the optical window of the laser, and real-time self-cleaning of the optical window of the laser is realized.
Description
technical field [0001] The invention relates to the technical field of discharge-excited gas lasers, in particular to a closed-loop discharge-excited pulse repetition-frequency gas laser with a self-cleaning light window based on the principle of electrostatic dust removal and an operating method thereof. Background technique [0002] Discharge-excited pulse repetition-frequency gas lasers usually adopt a closed-loop method, using a gas circulation device to realize rapid gas replacement in the discharge area, eliminating the impact of the previous pulse discharge on subsequent pulses. However, in order to ensure the electrical insulation of the laser, the laser light window generally adopts an outwardly protruding structure. During the operation of the laser, the gas in the light window cannot be effectively replaced by the gas circulation device, and a large number of particles generated by the discharge gather in the laser light window area. These particles will adhere to...
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IPC IPC(8): H01S3/034H01S3/036
Inventor 黄超黄珂安晓霞马连英李高鹏雷飞
Owner NORTHWEST INST OF NUCLEAR TECH