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Non-linear optic crystal laser variable frequency phase adapter

A technology of nonlinear optics and matching devices, which is applied in the direction of nonlinear optics, lasers, laser components, etc., can solve the problems of difficult and inconvenient phase matching angle cutting, etc., and achieve the effect of increasing the effective length and improving the frequency conversion efficiency

Inactive Publication Date: 2005-08-17
INST OF PHYSICS - CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect that the above-mentioned nonlinear optical crystal is not easy, impossible or inconvenient to cut according to the phase matching angle corresponding to a specific wavelength, and to provide a phase matching that can be achieved without cutting according to the phase matching direction, and can meet specific requirements. The incident wavelength laser realizes the frequency conversion requirements, and makes full use of the crystal volume to increase the effective length of the nonlinear optical crystal laser frequency conversion phase matcher

Method used

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  • Non-linear optic crystal laser variable frequency phase adapter
  • Non-linear optic crystal laser variable frequency phase adapter
  • Non-linear optic crystal laser variable frequency phase adapter

Examples

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Comparison scheme
Effect test

Embodiment 1

[0033] according to figure 1 Make a nonlinear optical crystal laser frequency conversion phase matcher of the present invention:

[0034] A piece of KBBF nonlinear optical crystal 1 with length L=6.9mm and thickness d=0.6mm, the two surfaces of the crystal 1 are parallel to each other, and these two surfaces are perpendicular to the Z axis of the crystal; one side of the nonlinear optical crystal 1 is The incident end face 5, the incident end face 5 is cut into the angle α1=66° with the surface of the nonlinear optical crystal 1; Angle α2=80° constitutes the nonlinear optical crystal laser frequency conversion phase matcher of this embodiment.

[0035] The fundamental frequency light A with a wavelength of 354.7nm is incident at an angle of 0°, and the phase matching angle θ of the sixfold frequency can be achieved in the nonlinear optical crystal 1 PM=66.33°, realizing the frequency conversion from 354.7nm to 177.4nm, the light is totally reflected on the two surfaces of th...

Embodiment 2

[0038] according to figure 2 Make a nonlinear optical crystal laser frequency conversion phase matcher of the present invention:

[0039] A piece of KABO nonlinear optical crystal 1 with length L=3.2mm and thickness d=1mm, the nonlinear optical crystal 1 has two mutually parallel surfaces, and these two surfaces are perpendicular to the Z axis of the crystal; the nonlinear optical crystal 1 One side is the incident end face 5 and also the outgoing end face 6, which is cut perpendicular to the surface of the nonlinear optical crystal 1; the other side of the nonlinear optical crystal 1 is coated with a 532nm and 266nm high-reflection film 2, which constitutes the non-linear optical crystal 1 of this embodiment. Linear optical crystal laser frequency conversion phase matcher.

[0040] figure 2 Among them, the fundamental frequency light A with a wavelength of 532nm is incident at θi=55.3°, and the included angle with the optical axis Z in the crystal is θ PM =58.1°, reachin...

Embodiment 3

[0043] according to image 3 Make a nonlinear optical crystal laser frequency conversion phase matcher of the present invention:

[0044] A piece of KBBF nonlinear optical crystal 1 with length L=5.16mm and thickness d=1mm has two mutually parallel surfaces, and these two surfaces are perpendicular to the Z-axis of the crystal; one side of the nonlinear optical crystal 1 is The incident end face 5, which is cut perpendicular to the crystal surface; the other side of the crystal 1 is the exit end face 6, which is also cut perpendicular to the crystal surface; ultra-smooth surfaces are used on the incident end face 5 and the exit end face 6 of the crystal. The crystal surface is in optical contact with the coupling prism (that is, it is bonded by optical glue), and an in-coupling prism 3 and an out-coupling prism 4 are bonded respectively. The right-angle prism of fused silica material with θ2=52.6° constitutes the nonlinear optical crystal laser frequency conversion phase matc...

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Abstract

The non-linear optical crystal laser frequency varying phase matcher includes one non-linear optical crystal with parallel upper and lower planes and side face as incident end plane for the fundamental frequency laser and outgoing end plane, with the incident end plane is so cut as to make the directly incident or coupler incident fundamental frequency laser reaching the phase matching angle. The present invention can use those non-linear crystals hard to cut, utilize the volume of crystal fully, increase the effective length of crystal and raise frequency converting efficiency for effective application in laser frequency varying field, so that the present invention provides one important way for effective utilization of non-linear optical crystal material.

Description

technical field [0001] The invention relates to a laser frequency conversion phase matcher, in particular to a nonlinear optical crystal laser frequency conversion phase matcher. Background technique [0002] At present, the known nonlinear optical crystal laser frequency conversion (including frequency doubling, sum frequency, difference frequency and optical parametric oscillation and amplification) is to cut the nonlinear optical crystal according to the phase matching angle, and the frequency-converted laser is incident at a certain incident angle, and then Precisely rotate the crystal to adjust the incident angle to the phase matching angle (called angle tuning) or control the crystal temperature to make the crystal achieve phase matching and achieve effective frequency conversion output, such as literature 1 (V.G.Dmitriev, G.G.Gurzadyan, D.N.Nikogosyan, "Handbook of Nonlinear Optical Crystals ", second Revised and updated Edition, Springer-V...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/01G02F1/35G02F1/37G02F2/02H01S3/00
Inventor 许祖彦王桂玲林学春陈创天
Owner INST OF PHYSICS - CHINESE ACAD OF SCI