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Compact lath pulse laser

A pulsed laser, compact technology, used in lasers, laser parts, phonon exciters, etc., can solve problems such as unfavorable laser stable output, inability to achieve high-power operation, complex structure, etc., to reduce thermal management requirements , compact structure, the effect of increasing the optical path length and the number of reflections

Pending Publication Date: 2022-01-04
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the saturable absorber has a strong absorption of the fundamental frequency laser, and the thermal lens effect is also very obvious, which is not conducive to the stable output of the laser
[0004] In the prior art, the structure of the pulsed laser is complex and large, and the power is limited due to the thermal effect, so it cannot be operated at high power, and the optical path is a linear optical path parallel to the axis, which will cause distortion

Method used

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Examples

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Effect test

Embodiment 1

[0045] Embodiment one, such as figure 1 and figure 2 As shown, the first embodiment of the present invention provides a compact high-power pulsed laser, including: pump optical module 3, bonded crystal 2 (including laser crystal 21 and passive Q-switched crystal 22), output mirror 5, Total reflection mirror 1. The total reflection mirror 1 , the bonded crystal 2 and the output mirror 5 are sequentially placed along the optical axis from left to right to form a laser resonant cavity.

[0046] Bonding crystal 2 comprises laser crystal 21 and passive Q-switching crystal 22, and laser crystal 21 is Nd in the present embodiment: YAG crystal (neodymium-doped yttrium aluminum garnet crystal) and passive Q-switching crystal is Cr: YAG crystal (chromium-doped yttrium aluminum garnet crystal), the bonded crystal 2 is a trapezoidal crystal with Brewster angles at both ends 201 . The laser crystal 21 can absorb the pumping light, generate intracavity oscillation laser, and create cond...

Embodiment 2

[0051] Embodiment two, such as image 3 Shown:

[0052] Adopt end-pumped slab self-Q switching method, including: diode laser array 13, laser crystal 21, passive Q-switching crystal 22, output mirror 5, total reflection mirror 1, shaping coupling system 32;

[0053] The total reflection mirror 1, the bonding crystal 2 and the output mirror 5 are placed along the optical axis in order from left to right to form a laser resonant cavity.

[0054] The bonding crystal 2 includes a laser crystal 21 and a passive Q-switching crystal 22. In this embodiment, the laser crystal 21 is a Nd:YAG slab crystal and the passive Q-switching crystal 22 is a Cr:YAG crystal. In order to increase the heat dissipation effect and withstand higher pumping power, a section of white YAG crystal 23 is bonded outside the Cr:YAG crystal to export the heat of the passive Q-switched crystal to improve the heat dissipation performance of the bonded crystal 2 .

[0055] The bonded crystal 2 is located between...

Embodiment 3

[0060] Embodiment three, such as Figure 4 and Figure 5 as shown,

[0061] A self-Q-switching laser using edge-pumped slabs, including: pump light source, diode laser array 3, LD edge pump light shaping coupling system 32, bonded crystal 2, output mirror 5, and total reflection mirror 1;

[0062] The total reflection mirror 1, the bonding crystal 2, and the output mirror 5 are placed along the optical axis in order from left to right to form a laser resonant cavity.

[0063] As a gain medium, the laser crystal 21 can absorb the pump light, realize particle population inversion, and generate laser light. In this embodiment, the laser crystal 21 is a Nd:YAG slab crystal with one end bonded to a white YAG crystal 23 and one end bonded to a passive Q-switching crystal 22 . The laser crystal 21 is located between the two cavity mirrors. In this embodiment, the edge pumping method is adopted to provide high-brightness pump light and also make the distribution of the pump light i...

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Abstract

The invention discloses a compact lath pulse laser which comprises a laser oscillation cavity, the laser oscillation cavity is composed of a total reflection mirror (1), a bonding crystal (2) and an output mirror (5) which are sequentially arranged along the same axis, the two end faces (201) of the bonding crystal (2) are inclined faces, the included angle between the two end faces (201) and the axis is a Brewster angle, and a pump light module is arranged on the side face of the bonding crystal (2). The pulse laser of the diode array pumping bonding crystal based on the passive Q-switching principle is simple and compact in structure and can generate pulse laser with the peak power reaching hundreds of watts to thousands of watts. The bonding crystal (2) is further adopted as a working medium, the bonding crystal is combined with the laser crystal (21) and the passive Q-switched crystal (22) which serve as gain media into a whole, the heat effect of the working medium in the laser working process can be reduced, meanwhile, the bonding crystal (2) is arranged to be of a lath-shaped structure, the contact area with the heat sink (4) is increased, the thermal management requirement of the solid laser, especially a high-power solid laser is lowered, and an effective way for realizing the compact high-power pulse laser is provided.

Description

technical field [0001] The invention relates to the field of solid-state lasers, in particular to a compact high-power slab pulse laser. Background technique [0002] Pulsed lasers are widely used in medical, industrial and military fields. However, these lasers have problems such as large structure and low power in their work. [0003] In the prior art, acousto-optic Q-switching is commonly used. This method needs to add a Q switch in the resonant cavity, and at the same time requires an external power supply to drive the Q switch, which makes the system relatively complex, bulky, and the resonant cavity increases. Lasers are more susceptible to thermal lensing and destabilization when operating at high pump powers. In addition, the acousto-optic Q switch is expensive, which also limits the application development of the technology. Although the passive Q-switching technology is relatively simple and can greatly simplify the system structure, since the saturable absorber...

Claims

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Application Information

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IPC IPC(8): H01S3/091H01S3/094
CPCH01S3/091H01S3/094049H01S3/094038H01S3/094076
Inventor 许昌王志敏邹跃涂玮薄勇彭钦军
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI