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Device for improving spot quality of non-linear crystal frequency-conversion laser

A nonlinear crystal and laser spot technology, applied in nonlinear optics, optics, instruments, etc., can solve the problems of deviation from the fundamental frequency optical path, deterioration of laser spot quality, elongation of converted laser, etc., to achieve simple operation, obvious effect, The effect of improving the quality of the spot

Pending Publication Date: 2018-01-09
福建科彤光电技术有限公司
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Problems solved by technology

[0003] However, in the process of using nonlinear crystals for laser frequency conversion, due to the unavoidable walk-off effect brought about by the birefringence effect, the converted laser light generated within a certain effective nonlinear action length is gradually elongated , which deviates from the fundamental frequency optical path, which often makes the quality of the output laser spot worse

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  • Device for improving spot quality of non-linear crystal frequency-conversion laser
  • Device for improving spot quality of non-linear crystal frequency-conversion laser
  • Device for improving spot quality of non-linear crystal frequency-conversion laser

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Embodiment 1

[0016] This implementation case provides a device for improving the quality of nonlinear crystal frequency conversion laser spot, the device includes a nonlinear crystal unit 1 and a walk-off compensation crystal unit (walk-off compensation crystal unit) 2; the nonlinear crystal unit 1 Including nonlinear crystals, the nonlinear crystals are composed of β-barium borate crystals or β-barium borate crystals or cesium lithium borate crystals, and the walk-off compensation crystal unit (walk-off compensation crystal unit) 2 includes a uniaxial crystal, The uniaxial crystal is composed of yttrium vanadate crystal or α-barium borate crystal, and the nonlinear crystal unit 1 and the walk-off compensation crystal unit (walk-off compensation crystal unit) 2 are separated structures or optically bonded Bonded into a monolithic structure.

[0017] The thickness l of the walk-off compensation crystal 2 The walk-off angle θ of the converted laser 1 and effective nonlinear action distance...

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Abstract

The invention discloses a device for improving spot quality of non-linear crystal frequency-conversion laser. The device comprises a non-linear crystal unit and a walk-off compensation crystal unit, wherein the non-linear crystal unit comprises a non-linear crystal which is composed of beta-barium borate crystals or caesium lithium borate; the walk-off compensation crystal unit comprises an uniaixal crystal which is composed of yttrium vanadate crystals or alpha-barium borate crystals. The device for improving the spot quality of the non-linear crystal frequency-conversion laser performs compensating and shaping treatment on laser spots frequency-converted by the non-linear crystal through the walk-off compensation crystal to obtain round laser spots under the premise of not losing the optical power of converting laser, thereby improving the spot quality. Meanwhile, the device for improving the spot quality of the non-linear crystal frequency-conversion laser is simple in operation, significant in effects, low in cost and capable of solving the technical problem of quality reduction of output laser spots.

Description

technical field [0001] The invention belongs to the technical field of crystal lasers, and in particular relates to a device for improving the quality of nonlinear crystal frequency conversion laser spots. Background technique [0002] ​In the history of laser development, laser frequency conversion technology is an important technical means to expand the laser spectral range. Through frequency conversion, we can extend the laser wavelength to the UV band other than visible light or even shorter. In the process of obtaining short-wavelength laser output through laser frequency conversion, the use of nonlinear crystals plays an irreplaceable role. The invention of nonlinear crystals has enriched the laser spectrum and broadened the wavelength range, especially in the short wavelength range. ), KBBF (potassium fluoroboryryllium crystal) and other star crystals. [0003] However, in the process of using nonlinear crystals for laser frequency conversion, due to the unavoidable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/35
Inventor 校金涛陈基平
Owner 福建科彤光电技术有限公司
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