Method for increasing laser thermal response speed and multi-terminal pump solid state laser

A thermal response, laser crystal technology, used in lasers, laser parts, phonon exciters, etc., can solve the problem of slow laser thermal response, avoid laser damage, increase flexibility, and achieve the function of Q-switched laser pulse energy attenuation Effect

Active Publication Date: 2014-04-30
张立国
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for improving laser thermal response s...

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  • Method for increasing laser thermal response speed and multi-terminal pump solid state laser
  • Method for increasing laser thermal response speed and multi-terminal pump solid state laser
  • Method for increasing laser thermal response speed and multi-terminal pump solid state laser

Examples

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Embodiment 1

[0044] figure 1 A schematic diagram of the structure used in a fiber-coupled double-ended pumped acousto-optic Q-switched solid-state laser for the method of improving the laser thermal response speed, such as figure 1 As shown: the double-end pumped acousto-optic Q-switched solid-state laser in this embodiment includes a laser resonator, a laser crystal group, a pump source group, a Q-switched switch module, an externally modulated optical switch group, a substrate (not marked in the figure) and Laser controller (not marked in the figure). Among them, the laser resonator includes a front cavity mirror 2, a rear cavity mirror 9, and a folding mirror 4, all of which are fixed on the substrate. The rear cavity mirror 9 reflects 95% of the fundamental frequency laser and transmits 5%; the laser crystal group includes YVO4 Laser crystal 3, this embodiment is a fundamental-frequency laser crystal, in fact, two or more fundamental-frequency laser crystals with the same or different...

Embodiment 2

[0055] figure 2 A schematic diagram of the structure used in a fiber-coupled double-ended pumped acousto-optic Q-switched solid-state harmonic laser for the method of improving the laser thermal response speed, such as figure 2 As shown: the double-end pumped acousto-optic Q-switched solid harmonic laser in this embodiment includes a laser resonator, a laser crystal group, a pump source group, a Q-switched switch module, an externally modulated optical switch group, and a substrate (not marked in the figure) ), laser controller (not marked in the figure). Wherein, the laser resonant cavity includes a front cavity mirror 12, a rear cavity mirror 23, a folding mirror 14, a folding mirror 17, and a Brewster plate 20, all of which are fixed on the substrate, and the rear cavity mirror 23 is opposite to the fundamental frequency laser 95% reflection, 5% transmission; the laser crystal group includes YVO4 laser crystal 13 and frequency-doubled laser crystal 22, and the frequency-...

Embodiment 3

[0065] image 3 A schematic diagram of the structure used in a fiber-coupled double-ended pumped acousto-optic Q-switched solid-state harmonic laser for the method of improving the laser thermal response speed, such as image 3 As shown: the double-end pumped acousto-optic Q-switched solid harmonic laser in this embodiment includes a laser resonator, a laser crystal group, a pump source group, a Q-switched switch module, an externally modulated optical switch group, and a substrate (not marked in the figure) ), laser controller (not marked in the figure). Wherein, the laser resonator includes a front cavity mirror 32, a rear cavity mirror 40, and a folding mirror 34, all of which are fixed on the substrate, and the rear cavity mirror 40 reflects 95% of the fundamental frequency laser and transmits 5%; the laser crystal group Including YVO4 laser crystal 33 and frequency doubled laser crystal 39, said frequency doubled laser crystal 39 is a laser nonlinear conversion crystal, ...

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Abstract

The invention relates to a method for increasing the laser thermal response speed and a multi-terminal pump solid state laser. When Q adjusting lasers are needed for laser processing, a Q adjusting switch module is used for conducting laser Q adjusting, at the moment a laser resonant cavity outputs the Q adjusting lasers, and an external modulation optical switch is in a light-transmitting state. When laser processing coordinate positions change and light closing is needed, the Q adjusting switch module does not work or the Q adjusting power is reduced for partial light locking, the external modulation optical switch turns off or attenuates the continuous laser power output by the laser resonant cavity, and then materials to be processed are prevented from being damaged by lasers. When the Q adjusting lasers need to be output again, the external modulation optical switch is in a light-transmitting state, the Q adjusting switch module conducts Q adjusting on the lasers of the laser resonant cavity, and due to the fact that the change of thermal loads of laser crystals is small, the good laser thermal response is acquired. According to the technical scheme, laser processing efficiency is guaranteed while laser thermal response time is shortened, and the method for increasing the laser thermal response speed and the multi-terminal pump solid state laser are very suitable for being widely used in the field of laser processing.

Description

technical field [0001] The invention relates to the field of laser processing, in particular to a method for improving laser thermal response speed and a multi-terminal pumped solid-state laser. Background technique [0002] At present, the development speed of solid-state lasers is changing with each passing day, and its development direction is high average power, high pulse repetition frequency, narrow pulse width, etc. These development directions, without exception, relatively require relatively large pump power. For laser micromachining, frequent switching of the laser is required, and the thermal response time of the laser is required to be short, otherwise the processing effect and efficiency will be affected. For high-power solid-state lasers, there is a contradiction between high pump power and short thermal response time, which is manifested in the fact that the pump power continues to pump the laser crystal during the period when the laser does not emit light, re...

Claims

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Application Information

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IPC IPC(8): H01S3/11H01S3/10
Inventor 张立国
Owner 张立国
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