Terbium vanadate-doped magneto-optical crystal, growth method and applications thereof

A technology of magneto-optical crystals and growth methods, applied in crystal growth, single crystal growth, single crystal growth and other directions, can solve the problem that TGG crystals are difficult to grow high-quality crystals, it is difficult to obtain bulk high-quality crystals, and the utilization of crystals is affected. problems, to achieve the effect of low cost, less use, and compact device design

Active Publication Date: 2015-12-09
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented magnetic optics technology offers benefits such as stability during storage without decompositing or losing its properties over time, ease of manufacturing larger sizes while maintaining good quality materials, long lifespan, and efficient use of expensive rare earth elements.

Problems solved by technology

This patented technology discusses different types of materials called rare earth elements or tetrahedrally coordinated iron group metallic compounds such as Terbium Galloys (TMGs) and their applications in various industries like defense industry, communication technologies, energy storage devices, medical equipment, etc. These new materials have unique properties including small size, easy manufacturing process, good chemical stability over time, ability to absorb electromagnetic waves better compared to traditional magnetotropic crystalls made up mostly of ceramics, and they may provide superior overall performance even under extreme conditions.

Method used

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  • Terbium vanadate-doped magneto-optical crystal, growth method and applications thereof
  • Terbium vanadate-doped magneto-optical crystal, growth method and applications thereof
  • Terbium vanadate-doped magneto-optical crystal, growth method and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Example 1: Ca 0.2 Y 0.1 Tb 0.7 VO 4 Single crystal preparation

[0048] (1) Weigh high-purity raw material CaCO 3 , Tb 4 o 7 , V 2 o 5 and Y 2 o 3 , mix the weighed raw materials evenly, put them into a mold and press into a crucible for sintering, the sintering temperature is 1200 ° C, and sintering for about 12 hours to obtain Y and Ca doped TbVO 4 polycrystalline material;

[0049] (2) Get 650 grams of the polycrystalline material that step (1) obtains, put it into the iridium gold crucible of 60 millimeters in diameter, then put the iridium gold crucible into the single crystal furnace to evacuate, and fill into protective gas Nitrogen, adopt the medium frequency induction heating method, raise the temperature to about 1740 degrees, the polycrystalline material is melted, then increase the temperature by 8 degrees, and keep the temperature for ten minutes to make the melt mix evenly.

[0050] (2) Using direction TbVO 4 As a seed crystal, slowly lower i...

Embodiment 2

[0053] Example 2: Ca 0.1 Tb 0.9 VO 4 Single crystal preparation

[0054] The operation steps are the same as those in Example 1, except that:

[0055] No doping metal oxide is added, and in the crystal growth stage, the direction TbVO is used 4 As a seed crystal, the grown crystal is Ca 0.1 Tb 0.9 VO 4 , The crystal shape is symmetrical, and the crystal size is Ф21×26mm.

[0056] where Ca 0.1 Tb 0.9 VO 4 The X-ray powder diffraction pattern of polycrystalline material is attached figure 1 shown.

Embodiment 3

[0057] Embodiment 3: Preparation of polarization-dependent optical isolator

[0058] as attached figure 2 The schematic diagram of the optical isolator shown uses a 1064nm laser as a light source, and the Ca 0.2 Y 0.1 Tb 0.7 VO 4 The magneto-optic crystal device is placed in a magnetic field, and a polarizer and an analyzer are placed in the front and back respectively, and the polarization direction of the analyzer and the polarization direction of the polarizer form an angle of 45°. The light passing direction is parallel to the magnetic field direction.

[0059] Under the condition of magnetic field, the 1064nm laser beam emitted by the laser becomes polarized light after passing through the polarizer, and the polarization direction of the magneto-optical crystal device is rotated by 45°, while the polarization direction of the analyzer and the polarization direction of the polarizer form an angle of 45° , so that the light passes smoothly, and the reflected polarized...

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Abstract

The present invention relates to a terbium vanadate-doped magneto-optical crystal, a growth method and applications thereof. According to the present invention, the molecular formula of the terbium vanadate-doped magneto-optical crystal is CaxMyTb1-x-yVO4, wherein M is a rare earth element and an alkali metal element, x is more than or equal to 0.01 and is less than or equal to 0.5, and y is more than or equal to 0 and is less than or equal to 0.5; the faraday rotation angle of the series of the crystals at 1064 nm is 1.3-1.5 times the faraday rotation angle of the TGG crystal, the crystal has the congruent melting property and can grow through a Czochralski method, the large size crystal easily grows, the raw material cost is low, and the magneto-optical crystal cost can be effectively reduced; the magneto-optical crystal device prepared from the magneto-optical crystal has the large Verdet constant during magneto-optical isolator production, such that the requirement on the magneto-optical crystal length can be reduced; and compared with the magneto-optical crystal in the prior art, the magneto-optical crystal of the present invention has advantages of compact device design, reduction of the number of the magneto-optical crystals used in the isolator, cost reducing and the like. The terbium vanadate-doped magneto-optical crystal of the present invention can further be used for optical switch production.

Description

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Claims

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Application Information

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Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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