Method for generating third-harmonic-generation ultraviolet laser through fold resonating cavity

A technology of ultraviolet laser and resonator, which is applied to the structure/shape of lasers, laser parts, optical resonators, etc., can solve the problems of high maintenance costs, high energy consumption, and low efficiency, and achieve reduced absorption and high conversion efficiency , Improve the effect of frequency doubling efficiency

Inactive Publication Date: 2014-03-26
BEIJING UNIV OF TECH
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Problems solved by technology

[0003] Traditional ultraviolet laser sources such as argon ion lasers, nitrogen molecule lasers, excimer lasers, etc., have large equipment footprints, low efficiency, high energy consumption, and high maintenance costs, so they cannot be widely used.

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  • Method for generating third-harmonic-generation ultraviolet laser through fold resonating cavity

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Such as figure 1 Shown is a schematic diagram of the principle of using a folded resonator to generate triple-frequency ultraviolet laser. The folded resonator includes a total reflection mirror a1, a Q switch 2, a laser diode pump module 3, an output mirror 4, a sum frequency crystal 5, a total reflection Mirror b6, double frequency crystal 7, total reflection mirror c8, ultraviolet reflector a9, light splitting element 10, ultraviolet reflector b11; the resonant cavity is divided into three arms, the first arm contains Q switch 2, laser diode pump Module 3, the second arm contains a sum frequency crystal 5, and the third arm contains a double frequency crystal 7; the optical elements in the resonant cavity include a total reflection mirror a1, an output mirror 4, a total reflection mirror b6, and a total reflection mirror c8; The optical components outside th...

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Abstract

The invention discloses a method for generating a third-harmonic-generation ultraviolet laser through a fold resonating cavity. Laser crystal is pumped from the side face of a laser diode, simulated radiation is generated, fundamental frequency light generation is formed in the cavity, fundamental frequency light is converted into pulsed light through a Q switch, the power density of the fundamental frequency light is improved, second harmonics are generated by the fundamental frequency light through frequency doubling crystal, the ultraviolet laser is generated by the remaining fundamental frequency light and the generated second harmonics under the action of sum frequency crystal and is output out of the cavity through an output mirror; ultraviolet emergent light in one direction is reflected to the resonating cavity for vibration in a continued mode by an ultraviolet reflecting mirror outside the fold resonating cavity, so that the ultraviolet light is only output in one direction and loss of the ultraviolet light is reduced. The method of inner-cavity frequency doubling and sum frequency is applied to the fold resonating cavity, the high power density inside the cavity and the large mode volume are utilized, and therefore the ultraviolet laser conversion efficiency is improved.

Description

technical field [0001] The invention relates to a method for generating a triple-frequency ultraviolet laser, which belongs to the application field of laser technology, and in particular to a method for generating a triple-frequency ultraviolet laser by using a folded resonant cavity. Background technique [0002] Laser has been used in the field of material processing since its invention. Compared with infrared and visible light lasers, ultraviolet laser has the characteristics of short wavelength, good focusing performance, and high single-photon energy. It can directly destroy the chemical bonds of material molecules. With the help of high-density high-energy photons The process of initiating or controlling photochemical reactions will not cause thermal deformation and other effects on the periphery of the processing area. At the same time, ultraviolet lasers have high processing precision and are widely used in the electronics industry and other precision processing fiel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/109H01S3/08
Inventor 王旭葆王小磊吴丹刘俊米庆改
Owner BEIJING UNIV OF TECH
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