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Secondary electro-optic crystal with gradient refractive index effect and its preparation and application method

A gradient refractive index and secondary electro-optic technology, applied in crystal growth, chemical instruments and methods, single crystal growth, etc.

Active Publication Date: 2018-07-06
山东山科智晶光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in theory, for pure KTN crystals, the excellent and practical electro-optic effect and gradient refractive index performance cannot be obtained at the same time.

Method used

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  • Secondary electro-optic crystal with gradient refractive index effect and its preparation and application method
  • Secondary electro-optic crystal with gradient refractive index effect and its preparation and application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: Cu:KTa 0.67 Nb 0.33 o 3 (Cu doping amount 0.25at%)

[0042] high purity K 2 CO 3 、 Ta 2 o 5 , Nb 2 o 5 According to the molar ratio K 2 CO 3 : Ta 2 o 5 :Nb 2 o 5 =1.25:0.34:0.66 Weigh the ingredients, press CuO:(Ta 2 o 5 +Nb 2 o 5 ) / 2=0.25:100 molar ratio to calculate the weight of doped ion CuO powder, and mix it uniformly, put it into a platinum crucible after briquetting, and sinter in a muffle furnace at 1075°C for more than 24 hours to obtain Cu:KTN polycrystalline material About 1000 grams, put the Cu:KTN polycrystalline material in a platinum crucible, and carry out crystal growth in the atmosphere. After the process of seeding, necking, shouldering, and equal diameter growth, block Cu:KTa is obtained. 0.67 Nb 0.33 o 3 crystals.

[0043] Present embodiment gained Cu:KTa 0.67 Nb 0.33 o 3 crystal, the matrix component Ta / Nb is uniformly distributed in the crystal, and the doped ion Cu 2+ Inside the crystal, the distribution is li...

Embodiment 2

[0044] Example 2: Cu:KTa 0.63 Nb 0.37 o 3 (Cu doping amount 0.5at%)

[0045] The crystal growth preparation process of this example is basically similar to Example 1, the difference is that the ratio of raw materials is adjusted to K 2 CO 3 : Ta 2 o 5 :Nb 2 o 5 =1.25:0.31:0.69, the total mass of polycrystalline material is about 1000 grams, CuO:(Ta 2 o 5 +Nb 2 o 5 ) / 2 Weighing at a molar ratio of 0.25:100, the synthesis and sintering temperature of the polycrystalline material was adjusted to 1025° C., and the crystal growth process was the same as in Example 1. The resulting Cu:KTa 0.63 Nb 0.37 o 3 Cu in crystal 2+ It is distributed linearly and decreasingly along the c-axis direction, the ion concentration gradient is about 0.15at% / cm, and the corresponding crystal refractive index gradient is about 4×10 -3 / mm.

Embodiment 3

[0046] Embodiment 3: Fe:KTa 0.61 Nb 0.39 o 3 (Fe doping amount 1at%)

[0047] The crystal growth preparation process of this example is basically the same as that of Example 1, the difference is that the ratio of raw materials is adjusted to K 2 CO 3 : Ta 2 o 5 :Nb 2 o 5 =1.2:0.29:0.71, doped ion iron oxide according to Fe 2 o 3 :( 2 o 5 +Nb 2 o 5 ) was weighed at a molar ratio of 1:100, the synthesis and sintering temperature of the polycrystalline material was adjusted to 1000° C., and the crystal growth process was the same as in Example 1. Obtained Fe:KTa 0.63 Nb 0.37 o 3 Fe in crystal 3+ It is distributed linearly and decreasingly along the c-axis direction, the ion concentration gradient is about 0.3at% / cm, and the corresponding crystal refractive index gradient is about 3×10 -3 / mm.

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Abstract

The present invention specifically relates to a secondary electro-optic crystal with gradient refractive index effect and its preparation and application method. The ion-doped electro-optic crystal with the general formula M:KTa1-xNbxO3 has a perovskite structure, wherein M=Cu2+, Fe3+ , Sn4+, Ni2+, Ti4+, Na+, Li+, and the M content is 0~5at%; the Nb content in the crystal component is 0≤x≤0.5, and the Curie point is between -241~90℃, above the Curie point The crystal is cubic phase, m3m point group; below the Curie point, it becomes tetragonal phase, 4mm point group, the matrix component Ta / Nb is uniformly distributed in the crystal, the dopant ion M is non-uniformly distributed inside the crystal, and the concentration distribution is along the The crystal growth direction changes linearly. The invention realizes the functional combination of the crystal electro-optical effect and the gradient refractive index effect, and respectively realizes the propagation direction and laser intensity modulation of the same modulated sample in different directions.

Description

technical field [0001] The invention belongs to the technical field of functional crystal material preparation and laser modulation, and specifically relates to a secondary electro-optic crystal with gradient refractive index effect and its preparation and application method. Background technique [0002] Laser technology is one of the most important cutting-edge technologies in the country's medium and long-term scientific and technological development plan. As one of the core contents of laser technology, laser modulation technology is of great significance to its application and development. Laser modulation is mainly to achieve a specific output effect by adjusting the phase, intensity or amplitude of the laser. Commonly used laser modulation methods include mechanical modulation, electro-optic modulation, acousto-optic modulation, passive modulation, etc. Among them, electro-optic modulation has the advantages of high efficiency, good stability, fast response, easy cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/22C30B15/00
Inventor 王旭平刘冰杨玉国吕宪顺张园园魏磊王继扬
Owner 山东山科智晶光电科技有限公司
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