Frequency multipliver plate strip laser device in folding chamber for compensating astigmatism

An intra-cavity frequency doubling and laser device technology, applied in lasers, laser parts, phonon exciters, etc., can solve problems such as different beam waist diameters and focal positions, reducing frequency doubling efficiency, and affecting mode volume, etc. The effect of mature technology, high precision and high beam quality

Inactive Publication Date: 2005-03-02
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, astigmatism is introduced due to the fact that the folding mirror generally works at an off-axis position, so that the beam waist diameter and focal position of the beam on the meridian plane and the sagittal plane are different, thereby reducing the frequ

Method used

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  • Frequency multipliver plate strip laser device in folding chamber for compensating astigmatism
  • Frequency multipliver plate strip laser device in folding chamber for compensating astigmatism
  • Frequency multipliver plate strip laser device in folding chamber for compensating astigmatism

Examples

Experimental program
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Effect test

Example Embodiment

[0025] Example 1: figure 2 To compensate for astigmatism, a single-sided pump three-pass folding V-cavity intracavity frequency doubled slat laser device.

[0026] The laser device includes a first resonant cavity mirror 1, which is a plane mirror, and its side close to the cavity is coated with a 946nm high-reflection film; a slab crystal 3 is placed 60mm to the left of the first resonant cavity mirror 1, and the slab crystal 3 is Nd:YAG, the pump light source 2 is placed on the side of the slat crystal 3 for single-side pumping. The slat crystal 3 is 20mm long. The pumped side is coated with 808nm high-transmittance film, and the opposite surface is coated with 808nm high-reflective film. Film, two transparent surfaces are coated with 946nm high-transmittance film; 55mm away from the left side of the slat crystal 3, the first plane mirror 9 is placed, and its side close to the slat crystal 3 is coated with a 946nm high-reflection film, which makes the laser pass through the sla...

Example Embodiment

[0028] Example 2: image 3 In order to compensate for astigmatism, a double-sided pump five-pass folding Z-cavity intracavity frequency doubled slat laser device.

[0029] The laser device includes a first cavity mirror 1, which selects a plano-concave mirror with a radius of curvature of 1000mm, and its concave surface is coated with a high-reflection film of 1047nm; a first spherical folding mirror 4 is placed 50mm to the right of the first cavity mirror 1. A plano-convex mirror with a radius of curvature of -1500mm is selected, and the convex surface is coated with a 1047nm high-reflection film; a Q switch 8 is installed on the optical path between the first resonant cavity mirror 1 and the first spherical folding mirror 4, and the Q switch is an electro-optic Q Switch; on the spherical folding mirror 4 reflecting light path 60mm away from it, the slat crystal 3 is placed, the slat crystal 3 is Yb:S-FAP, two pump light sources 2 pump the slat crystal 3 on both sides The slat cr...

Example Embodiment

[0031] Example 3: Figure 4 To compensate for astigmatism, a double-sided pump single-pass zigzag optical path folding cavity frequency doubled slat laser device.

[0032] The laser device includes a first resonant cavity mirror 1, which is a plane mirror, and its side near the cavity is coated with a 1342nm high-reflection film; 60mm away from the left side of the first resonant cavity mirror 1, a pump light source 2 pumped on both sides Lath crystal 3, the lath crystal 3 is Nd:YVO 4 , The crystal is 20mm long, the left and right transparent surfaces are cut into Brewster angles, and the two pumped sides are coated with 1342nm high-reflection and 808nm high-transmittance films, and the laser propagates in a zigzag-shaped light path in the slab crystal 3; A spherical folding mirror 4 is placed 55mm from the left side of the slat crystal 3, which uses a plano-concave mirror with a radius of curvature of 2000mm, and its concave surface is coated with 1342nm high-reflection and 671nm...

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PUM

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Abstract

In this invention, along its light-pass, arranged respectively are: first cavity resonator mirror, latch crystal, spherical surface folding mirror; and along the reflection light-pass of said spherical surface mirror arranged respectively are: frequency doubling crystal and second cavity resonator mirror. Pumping light source is placed by the side of lath crystal for pumping it. In this invention, lath crystal is used as activated material, folding cavity for inner cavity frequency doubling, and lath crystal for overcoming heat effect. Advantages are: astigmatism produced by two effects in resonator can be compensated by regulating turning angle of spherical surface folding mirror.

Description

technical field [0001] The invention relates to a slab laser device, in particular to a folded intracavity frequency doubling slab laser device which compensates for astigmatism. Background technique [0002] The side-pumped slab laser with separate pumping surface and cooling surface has a simple device and is easy to dissipate heat. It not only effectively overcomes the thermal lens, thermally induced stress birefringence and thermal distortion caused by uneven heat distribution, but also because the gain medium The absorption of the slab laser has nothing to do with the length of the gain medium and can pump high power, so as to obtain high beam quality and high power laser output, so the slab laser has received people's attention. However, the non-axisymmetric slab crystal is an astigmatic element. Due to the different thermal focal lengths or optical paths in the meridian plane and the sagittal plane, the beam in the laser cavity has different spot sizes, optical The w...

Claims

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Application Information

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IPC IPC(8): H01S3/05H01S3/109H01S3/127H01S3/16
Inventor 耿爱丛王希军许祖彦侯玮李瑞宁张瑛
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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