A passively Q-switched laser and laser generation method thereof

A laser and passive technology, applied in the laser field, can solve problems such as increasing system complexity, poor laser output quality, and affecting marking processing effects

Active Publication Date: 2018-03-20
LASER TECH TIANJIN MAIMAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both heating and cooling are required, increasing the complexity of the system
In addition, in general, nonlinear crystals work at a relatively high temperature. If they are not heated, it will take a certain amount of time to reach the operating temperature of the nonlinear crystal. The quality of the laser output during this period is not good, which will affect the final marking or Processing effect

Method used

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  • A passively Q-switched laser and laser generation method thereof
  • A passively Q-switched laser and laser generation method thereof
  • A passively Q-switched laser and laser generation method thereof

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Experimental program
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Effect test

Embodiment 1

[0038] Such as figure 1 As shown, this embodiment discloses a passive Q-switched laser, including a pumping system 1 and a laser head 3, the pumping system 1 includes a driving source 12 for controlling the temperature of a nonlinear crystal, and the laser head 3 includes a non-linear The linear crystal 9, the temperature matched by the nonlinear crystal 9 is greater than room temperature.

[0039] This embodiment also discloses a laser generation method of a passive Q-switched laser according to the present invention, including the steps: the pumping system sends pump light to the laser head, the laser head generates infrared pulsed laser light, and then generates a single pulse laser through a nonlinear crystal wavelength of laser light; after the pumping system emits pumping light, the driving source controls the temperature of the nonlinear crystal to stabilize within its matching range.

[0040] Generally, nonlinear crystals are matched in two ways. One is temperature mat...

Embodiment 2

[0045] Such as Figure 1-3 As shown, this embodiment adopts a passive Q-switched laser with a high-temperature angle-matched nonlinear crystal 9, including a pumping system 1, a collimating mirror 6, a focusing mirror 7, and a resonant cavity 8 that are sequentially optically coupled with the pumping system 1. The resonant cavity 8 sequentially includes an optically coupled reflector 81, a gain component 82, a passive Q-switching crystal 83, and an output mirror 84 from one side of the focusing mirror 7; the output mirror 84 is sequentially coupled with a nonlinear crystal 9 and a The temperature matched by the beam mirror 5 and the nonlinear crystal 9 is greater than room temperature. Specifically, the temperature matched by the nonlinear crystal 9 is greater than 25°C and less than or equal to 150°C. Preferably, the matching temperature of the nonlinear crystal 9 is greater than or equal to 40°C and less than or equal to 60°C. For example, 45°C, 48°C, 52°C, 55°C, 57°C, etc...

Embodiment 3

[0052] Such as figure 2 As shown, the green laser disclosed in this embodiment includes a pumping system 1, an energy transmission fiber 2, and a laser housing 4. The laser housing 4 is provided with a collimating mirror 6, a focusing mirror 7, a reflecting mirror 81, and a first gain crystal 821, a passive Q-switching crystal 83, an output mirror 84 and a double frequency crystal 91, a beam expander mirror 5 is fixed outside the casing 4, wherein the pumping system 1 is composed of a driving source 11 and a pumping source 12, and the driving source 11 is a pump The pump source 12 supplies power, the pump source 12 emits pump light, passes through the energy transmission fiber 2, passes through the collimating mirror 6 and the focusing mirror 7, and then pumps the first gain crystal 821, and the first gain crystal 821 generates a population inversion , spontaneous radiation occurs, under the feedback of the resonant cavity 8 composed of the reflector 81 and the output mirror ...

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Abstract

The invention discloses a passive Q-switched laser and a laser generating method thereof. The passive Q-switched laser includes a pumping system and a laser head, wherein the pumping system includes a driving source for controlling the temperature of a nonlinear crystal, the laser head includes a nonlinear crystal, and the nonlinear crystal The matching temperature is greater than room temperature. The invention can improve the temperature response speed and reduce the cost.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a passive Q-switched laser and a laser generating method thereof. Background technique [0002] Since the advent of lasers, laser processing technology has been valued by people, and laser processing technology has become an important part of advanced manufacturing technology. Because the laser beam has a series of advantages such as good monochromaticity, high energy density, good space control and time control, it has been widely used in materials processing and other fields. Lasers for laser microprocessing, material marking and other fields are mainly There are infrared lasers, green lasers, and ultraviolet lasers. However, the existing lasers are relatively complex, and are mainly realized by acousto-optic or electro-optic Q-switched infrared solid-state lasers and green and ultraviolet lasers with nonlinear frequency conversion, and the cost is also high. [0003] Patent d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/091H01S3/11
Inventor 李斌孙冰
Owner LASER TECH TIANJIN MAIMAN
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