Laser with high power and high beam quality

A high beam and laser technology, applied in the field of lasers, can solve the problems of restricting the development of miniaturization and integration of lasers, increasing the cost and cycle of laser production, and increasing the length of the laser cavity, so as to promote the process of miniaturization and integration and improve the thermal lens effect. , the effect of reducing the difficulty of design

Inactive Publication Date: 2016-08-24
ANSHAN ZY LASER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method increases the cavity length of the laser, restricts the development of the laser towards miniaturization and integration, increases the production cost and cycle of the laser, increases the difficulty of debugging, and reduces the economic benefits of the enterprise

Method used

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  • Laser with high power and high beam quality
  • Laser with high power and high beam quality
  • Laser with high power and high beam quality

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Such as image 3 As shown, it is a laser form based on the basic structure of the present invention. The 808nm pump light is emitted by the fiber coupling system 1 and focused on the 3Nd: YVO4 laser crystal 3; The fundamental frequency light is modulated by the acousto-optic Q-switching device 4 .

[0050] In this embodiment, the front cavity mirror 2 is a 45° total reflection mirror 9, which converts the straight cavity into a folded cavity; then uses the 0° HR1064HT532 lens 6 to fold the optical path, and forms a resonant cavity with the rear cavity mirror 8, and utilizes frequency doubling Crystal 7 doubles the frequency of 1064nm fundamental frequency light to 532nm green light, which is output by 0° HR1064HT532 lens 6 .

[0051] In this embodiment, due to the high beam quality and high energy density of the fundamental frequency light, the light-to-light conversion efficiency is improved and the loss is small. The finally obtained 532nm laser has narrow pulse widt...

Embodiment 2

[0053] Such as Figure 4 As shown, in this implementation, on the basis of the structure of [Example 2], a sum frequency crystal 9 is added in front of the frequency doubling crystal 7, the 0°HR1064HT532 lens 6 is replaced by a 0°HR1064&532HT355 lens 11, and the 1064nm light After frequency doubling and summing, 355nm ultraviolet light is obtained.

[0054] The ultraviolet light obtained in this embodiment has the advantages of short wavelength, easy focusing, high energy, and good mode, and is an ideal laser light source for micro-drilling and laser marking; this light source is used in ultra-high-density optical drives, precision material processing, optical printing, etc. Wide range of applications.

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Abstract

The invention relates to a laser with high power and high beam quality. The laser comprises a fiber coupling system, a front cavity mirror, a laser crystal, an acoustic-optic Q-switched device and a rear cavity mirror arranged in sequence along an optical path; the fiber coupling system is composed of a pumping source, a transmission fiber and a focusing coupling system; the laser crystal has two ends with unequal sizes and a uniform transition variable section in the axial direction, wherein the small end is arranged in the front of the optical path; the outer surface of the laser crystal is a polished surface, two end faces are separately plated with an anti-reflection film for pumping light and fundamental frequency light, and the side surface of the laser crystal is plated with a high-reflection film for pumping light. By adopting the laser, the pumping light can be sufficiently absorbed after being reflected several times inside the laser crystal, so that the energy storage performance of the laser crystal and the conversion efficiency of the pumping light are improved; and under the condition that the laser output power is the same, the length of the laser crystal is shortened, the doping concentration and the thermal gradient are reduced, the thermal lens effect is improved, the beam quality is improved, and laser with high power and high beam quality is obtained.

Description

technical field [0001] The invention relates to a laser, in particular to a laser with high power and high beam quality. Background technique [0002] With the rapid development and wide application of laser technology, lasers have become an indispensable and important tool in industrial production, scientific detection, modern military and other fields. Beam quality is an important indicator of a laser, and it is a measure of the directional transmission capability of the laser beam or the energy concentration of the focused focal spot. Therefore, in practical applications, lasers with high power and high beam quality have always been the direction pursued by the industry. However, as the output power of the laser increases, factors such as thermal effects will gradually amplify, thus affecting the beam quality. Therefore, high power and high beam quality are opposites, which must be weighed in the development and manufacture of lasers. [0003] At present, the conventiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/16
CPCH01S3/163
Inventor 崔建丰王迪高涛张亚楠
Owner ANSHAN ZY LASER TECH
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