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Multilayer film triple frequency output mirror structure based on F-P cavity

A multi-layer thin-film, frequency-tripling technology, which is applied in the field of nonlinear optics and thin-film optics, can solve the problem of low nonlinear conversion efficiency, improve the third-order nonlinear response intensity, increase the transmission length, and improve triple-frequency conversion The effect of output strength

Inactive Publication Date: 2021-02-19
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

The nonlinear conversion efficiency of the above methods is small, and the multi-layer thin film structure based on the F-P cavity utilizes the principle of multi-beam interference effect in the cavity to fully amplify the nonlinear response process, providing a new idea for efficient frequency-doubling conversion output of thin-film materials

Method used

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  • Multilayer film triple frequency output mirror structure based on F-P cavity
  • Multilayer film triple frequency output mirror structure based on F-P cavity
  • Multilayer film triple frequency output mirror structure based on F-P cavity

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example 1

[0022] The central wavelength of the fundamental frequency of the triple frequency output mirror required by Example 1 is 1030nm, the transmittance is >95% when the fundamental frequency beam is incident at 0°, and the corresponding bandwidth is 4-5nm. When the incident energy density is >0.6J / cm 2 When triple frequency conversion efficiency> 1%.

[0023] The design steps are as follows:

[0024] 1. Select high refractive index material as HfO 2 , the low refractive index material is SiO 2 , the material of the spacer layer is ZnSe, the specific values ​​of the refractive index of these three materials at the fundamental frequency wavelength and the triple frequency wavelength are shown in Table 1, and the specific values ​​of the third-order nonlinear polarizability are shown in Table 2.

[0025] n1(λ=1030nm) n3(λ=343nm) HfO 2

1.94 2.00 SiO 2

1.45 1.48 ZnSe 2.41 2.67

[0026] Table 1

[0027] HfO2 SiO2 ZnSe ...

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Abstract

The invention provides a multilayer film triple frequency output mirror structure based on an F-P cavity, and the structure is characterized by sequentially comprising a substrate, a first reflectingfilm system, a spacing layer and a second reflecting film system from bottom to top. The basic expression is G / R1LR2 / A, wherein G represents a substrate material, R1 represents a first reflective filmsystem, R2 represents a second reflective film system, L represents a spacer layer, and A represents an incident medium. An F-P cavity structure is formed by two groups of reflecting film systems andthe spacer layer, so that a multi-beam interference effect is generated in the cavity, the interaction between fundamental frequency light and a nonlinear thin-film material is enhanced by regulatingthe intensity of the interference effect in the cavity and the types and the thicknesses of materials in the spacer layer, and triple-frequency efficient conversion output is realized. The method hasthe advantages that the physical scale is small, the nonlinear response output can be finely regulated and controlled, the frequency tripling conversion efficiency of the film-state material is improved, and the like.

Description

technical field [0001] The invention belongs to the field of nonlinear optics and thin film optics, in particular to a multilayer thin film triple frequency output mirror structure based on F-P cavity. Background technique [0002] With the rapid development of nonlinear optics in recent years, the demand for nonlinear miniaturized response devices has gradually increased, and nonlinear crystals have limited the development of nonlinear miniaturized response devices due to physical size constraints. The nonlinear conversion output of thin-film materials has the advantages of low loss, high damage threshold, and easy integration. In the field of ultra-short and ultra-intense lasers, it has been confirmed that thin-film components produce nonlinear photoluminescence during laser irradiation. Thin-film Nonlinear effects of components are getting more and more attention. According to current reports, there are mainly the following methods to use thin-film materials to achieve n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/35
CPCG02F1/353G02F1/3534
Inventor 邵建达陈美玲胡国行朱美萍张恺馨王尧
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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