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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 frequency doubling efficiency
Intra-cavity frequency doubling of a folded cavity usually increases the cavity length to reduce the fold angle, thereby minimizing the astigmatism, but changing the cavity length will affect the mode volume, and the astigmatism still exists

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

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Effect test

Embodiment 1

[0025] Example 1: figure 2 Single-side-pumped triple-pass folded V-cavity intracavity frequency-doubling slab laser device for astigmatism compensation.

[0026] This laser device comprises the first resonant cavity mirror 1, and it selects plane mirror for use, and its side near the cavity is coated with a 946nm high-reflection film; a slab crystal 3 is placed at a distance of 60 mm from the left side of the first resonant cavity mirror 1, and the slab crystal 3 is Nd:YAG, the pump light source 2 is placed on one side of the slab crystal 3 to pump it on one side. The slab crystal 3 is 20mm long, and the pumped side is coated with 808nm high-transparency film, and the opposite surface is coated with 808nm high-reflection film. The two transparent surfaces are coated with a 946nm high-transparency film; the first plane mirror 9 is placed 55mm away from the left side of the slab crystal 3, and the side close to the slab crystal 3 is coated with a 946nm high-reflection film, whi...

Embodiment 2

[0028] Example 2: image 3 Double-sided pumped five-pass folded Z-cavity intracavity frequency-doubling slab laser device for astigmatism compensation.

[0029] The laser device includes a first resonator mirror 1, which is a plano-concave mirror with a radius of curvature of 1000mm, and its concave surface is plated with a 1047nm high-reflection film; the first spherical folding mirror 4 is placed at a distance of 50mm from the right side of the first resonator mirror 1, and it A plano-convex mirror with a radius of curvature of -1500mm is selected, and its convex surface is coated with a 1047nm high-reflection film; a Q switch 8 is placed on the optical path between the first resonator mirror 1 and the first spherical folding mirror 4, and the Q switch is an electro-optic Q switch. Switch; 60 mm away from the reflected optical path of the spherical folding mirror 4, a slab crystal 3 is placed, and the slab crystal 3 is Yb:S-FAP, and two pumping light sources 2 carry out doub...

Embodiment 3

[0031] Example 3: Figure 4 Double-side-pumped single-pass zigzag optical path folded intracavity frequency-doubling slab laser device for astigmatism compensation.

[0032] 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 1342nm high-reflection film; the left side of the first resonant cavity mirror 1 is 60 mm away from the pumping light source 2 and pumped on both sides. Lath crystal 3, the lath crystal 3 is Nd:YVO 4 , the crystal is 20mm long, the left and right light-transmitting surfaces are cut into Brewster's angle, and the pumped two sides are coated with 1342nm high-reflection and 808nm high-transparency films, and the laser travels in a zigzag optical path in the slab crystal 3; A spherical folded mirror 4 is placed at 55 mm from the left side of the slat crystal 3. It is a plano-concave mirror with a radius of curvature of 2000 mm, and its concave surface is plated with a 1342 nm ...

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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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