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An optical parametric oscillator for welding transparent or white plastic

A technology of optical parametric oscillators and white plastics, applied in lasers, laser components, phonon exciters, etc., can solve problems such as poor beam quality, high cost, and inability to achieve phase matching, so as to improve absorption efficiency and beam quality Good and efficient effect

Active Publication Date: 2020-09-01
山东铂锐激光科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The beam quality of 1710nm semiconductor laser is poor, and the output power is much lower than that of 808nm and 976nm semiconductor laser; figure 1 mentioned)
The existing optical parametric oscillator pump sources are mature all-solid-state lasers with a wavelength of 1 micron, and the nonlinear crystals are all bulk single crystals (potassium dihydrogen phosphate KTP, phosphorus germanium zinc ZGP, etc.), according to Oscillating three-wave coupling equation, phase matching cannot be achieved when outputting at 1710nm and 2300nm at the same time
Therefore, it is difficult to achieve simultaneous output of 1710nm and 2300nm by using the refractive index phase matching technology of bulk single crystal; and, so far, there is no report of simultaneous output of 1710nm and 2300nm

Method used

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  • An optical parametric oscillator for welding transparent or white plastic
  • An optical parametric oscillator for welding transparent or white plastic
  • An optical parametric oscillator for welding transparent or white plastic

Examples

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Effect test

Embodiment 1

[0041] An optical parametric oscillator for welding transparent or white plastics, such as figure 2 As shown, it includes a semiconductor laser A1, a collimating focusing system A2, a resonant cavity, and a filter 6 arranged in sequence along the optical path; the resonant cavity includes a laser input mirror 3, a nonlinear optical crystal 4, and a laser output mirror 5;

[0042] In this embodiment, the period of the optical superlattice crystal is 29 μm, the temperature of the optical superlattice crystal is controlled at 134° C., and the operating wavelength of the semiconductor laser A1 is 980 nm.

[0043] The optical superlattice crystal is a periodically polarized potassium titanyl phosphate crystal (PPKTP).

[0044] After the pump light output by the semiconductor laser A1 is collimated by the collimation focusing system A2, the pump light enters the resonator, and the pump light enters the nonlinear optical crystal 4 after passing through the laser input mirror 3. The crystal...

Embodiment 2

[0058] According to the optical parametric oscillator for transparent or white plastic welding provided in embodiment 1, the difference lies in:

[0059] In this example, the working wavelength of the semiconductor laser A1 is 808 nm, the output mode of the semiconductor laser A1 is fiber coupled output, and the angle a between the filter 6 and the optical path satisfies 30°.

[0060] The materials of the laser input mirror 3 and the laser output mirror 5 are mid-infrared quartz. Mid-infrared quartz has the effect of transmitting the idle frequency light of 2300nm and 1700nm located in the mid-infrared band, realizing the function of positive feedback and mode selection of the resonant cavity.

[0061] In this embodiment, the nonlinear optical crystal 4 is a periodically polarized lithium niobate crystal (PPLN), the period of the nonlinear optical crystal 4 is 20 μm, and the temperature of the nonlinear optical crystal 4 is controlled at 200°C.

[0062] In this example, a single reson...

Embodiment 3

[0064] According to the optical parametric oscillator for transparent or white plastic welding provided in embodiment 1, the difference lies in:

[0065] Such as image 3 As shown, the optical parametric oscillator also includes a semiconductor laser B9 and a collimation focusing system B8, and the resonant cavity also includes a 45° harmonic mirror A7; a semiconductor laser B9, a collimating focusing system B8, a 45° harmonic mirror A7, and nonlinear optics The crystal 4 is arranged along the optical path in turn, the 45° harmonic mirror A7 forms an angle of 45° with the optical path, the laser output mirror 5 is set on the side of the 45° harmonic mirror A7, and the laser output mirror 5 is perpendicular to the optical path. The semiconductor laser B9 The working wavelength is 808nm.

[0066] The optical superlattice crystal is a periodically polarized lithium tantalate crystal (PPLT).

[0067] After the pump light output by the semiconductor laser A1 is collimated by the collimat...

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Abstract

The invention relates to an optical parametric oscillator for transparent or white plastic welding. The optical parametric oscillator comprises a semiconductor laser A, a collimating focusing system A, a resonant cavity and a filter plate which are arranged in sequence along an optical path. The resonant cavity comprises a laser input mirror, a nonlinear optical crystal and a laser output mirror.The nonlinear optical crystal is a periodically polarized optical superlattice crystal. The period of the optical superlattice crystal is 20-30 microns. The temperature of the optical superlattice crystal is controlled at 50-200 DEG C. The simultaneous output of 1710nm and 2300nm laser can be realized and the absorption efficiency of the transparent or white plastic material can be greatly improved. The simultaneous output of 1710nm and 2300nm laser with high power (50W), high efficiency and high beam quality (M2 (1.5) can be realized by optimizing the resonant cavity structure of the opticalparametric oscillator so as to meet the requirements of transparent or white plastic laser welding.

Description

Technical field [0001] The invention relates to an optical parametric oscillator for welding transparent or white plastics, belonging to the technical field of solid-state lasers. Background technique [0002] Lasers are widely used in industrial processing fields due to their advantages of good directionality, high brightness, and good monochromaticity. Laser processing technology is one of the main applications of laser technology in industry. It accelerates the transformation of traditional processing industries and provides new means for modern processing technology. Laser processing refers to the use of laser beams to cut, scribe, mark, weld, and perforate industrial parts. Compared with traditional methods, laser processing has the advantages of good processing quality, fast processing speed, high precision, no limitation of size and shape, no pollution, low noise, no tool wear, and high efficiency. [0003] Since the beginning of the 21st century, the rapid development of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/108H01S3/102H01S3/105H01S3/0941H01S3/16
CPCH01S3/0941H01S3/1028H01S3/105H01S3/1083H01S3/1671H01S3/1675
Inventor 张百涛聂鸿坤颜秉政刘俊亭杨克建何京良
Owner 山东铂锐激光科技有限公司
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