Crystal device
A device and crystal technology, applied in the field of optical crystal devices, can solve problems such as spot deformation, interaction interval reduction, frequency doubled light energy density reduction, etc.
Inactive Publication Date: 2013-02-27
FUZHOU PHOTOP QPTICS CO LTD
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Problems solved by technology
For type II angular phase matching, due to the influence of the Walk-Off effect, o and e light will separate after a certain distance, resulting in a reduction in the interaction interval, which directly limits the frequency conversion efficiency of the crystal; for type I phase matching, the basic After the frequency-doubled light is generated in the nonlinear crystal, under the action of the Walk-Off effect, the generated frequency-doubled light (e light) is separated from the fundamental frequency light, and the fundamental frequency light continuously generates frequency-doubled light during the propagation process. The frequency-doubled light keeps leaving the fundamental frequency light, which makes the spot of the frequency-doubled light deformed. The longer the crystal, the larger the deformation of the spot of the frequency-doubled light. Bad
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[0016] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.
[0017] refer to figure 1 As shown, the crystal device of the basic embodiment of the present invention is: two parallel film planes are arranged at the light-passing surfaces on both sides of a nonlinear crystal sheet 11, and the fundamental frequency light enters the nonlinear crystal at a small angle. Crystal slice 11, wherein the first film system surface at the first light-passing surface is an anti-reflection dielectric film in the incident light region 111, and the other regions 112 are high-reflection dielectric films, and the second film system surface at the second light-passing surface The light emitting region 125 is an anti-reflection dielectric film, and the other regions 124 are a high-reflection dielectric film. The first film system surface at the first light transmission surface is coated on the first light transmission surface of t...
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The invention relates to the field of optical devices, in particular to an optical crystal device. In the crystal device, at least two parallel film surfaces are arranged on a transmission surface on two sides of a nonlinear crystal sheet; fundamental frequency light enters the nonlinear crystal sheet at a small angle, wherein a first film surface on a first transmission surface is an anti-reflection dielectric film in an incident light region and is a high-reflection dielectric film in other regions; and a second film surface on a second transmission surface is an anti-reflection dielectric film in an incident light region and is a high-reflection dielectric film in other regions. The crystal device can eliminate the influence of Walk-Off effect.
Description
technical field [0001] The invention relates to the field of optical devices, in particular to an optical crystal device, which is used to eliminate the Work-off effect and improve the conversion efficiency and the power density of frequency-doubled light. Background technique [0002] In the field of laser nonlinear frequency conversion, some crystals have a large Walk-Off effect. For type II angular phase matching, due to the influence of the Walk-Off effect, o and e light will separate after a certain distance, resulting in a reduction in the interaction interval, which directly limits the frequency conversion efficiency of the crystal; for type I phase matching, the basic After the frequency-doubled light is generated in the nonlinear crystal, under the action of the Walk-Off effect, the generated frequency-doubled light (e light) is separated from the fundamental frequency light, and the fundamental frequency light continuously generates frequency-doubled light during t...
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IPC IPC(8): G02F1/37G02B1/11
Inventor 吴砺任策林江铭
Owner FUZHOU PHOTOP QPTICS CO LTD