Electro-optical Q laser used for high speed glass processing

Abstract

An electro-optical Q laser used for high speed glass processing comprises a laser diode which possesses a driving power supply and output coupling fiber with 880nm output wavelength. A first plane-convex lens, a second plane-convex lens, a back-cavity mirror, a laser medium, polaroid, an electro-optical Q switch, a lambda/4 wave plate, a 45-degree reflector, a 45-degree transmission-reflection mirror, frequency doubling crystal and a front cavity mirror are successively arranged along a laser direction output by the coupling fiber. The wavelength of the output green ray of the laser is 532nm. Average output maximum power is 11 watt. The highest frequency reaches more than 100KHz. Maximum single pulse energy is greater than 1mJ. A laser pulse width is less than 5ns. A light beam quality factor M<2> is less than or equal to 1.2. The laser of the invention can be used for applications, such as high speed etching on a glass surface, drilling, cutting and the like.

Description

technical field [0001] The invention relates to a laser, especially an electro-optical Q laser used for high-speed processing of glass. technical background [0002] Most end-pumped lasers currently on the market use fiber-coupled laser diodes with 808nm output and acousto-optic Q-switching systems. Neodymium-doped yttrium vanadate (hereinafter referred to as Nd:YVO 4 ) Laser crystals have been widely used to output linearly polarized laser due to their large absorption coefficient, but Nd:YVO 4 The thermal and mechanical processing properties of the crystal are poor, and the 808 nm semiconductor laser pumps Nd:YVO 4 Laser crystals can only obtain medium and low power laser output. [0003] As advanced manufacturing technologies such as micro-fine processing have higher and higher requirements for laser power, laser beam quality, and laser polarization state, the traditional 808 nm semiconductor laser-pumped solid-state laser exhibits laser pumping problems due to the ...

AI Technical Summary

Problems solved by technology

When using traditional mechanical methods to process glass, due to the mechanical properties of the drill bit, it is not possible to directly drill a round hole with a diameter of <0.8mm on the glass; The accuracy, cutting edge quality, yield, etc. cannot be guaranteed; moreover, coolant is often used during the processing, and after the processing is completed, it needs to be cleaned with water or ultrasonic cleaning, which is time-consuming and labor-intensive and easy to pollute the environment

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