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Process for preparing Yb#+[3+] and Cr#+[4+] doped yttrium-aluminium garnet crystal

A yttrium aluminum garnet and crystal technology is applied in the field of tunable laser crystals, which can solve the problems of low luminous efficiency, restrict the development of laser devices, etc., and achieve the effect of improving laser efficiency

Inactive Publication Date: 2005-06-29
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the band Cr 4+ The high laser threshold and low luminous efficiency of lasers have always restricted Cr 4+ Development of Laser Devices

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Will Yb 2 o 3 , Y 2 o 3 , Al 2 o 3 , Cr 2 o 3 and CaCO 3 The high-purity raw material is weighed according to x=0.05, y=0.0001, z=5y / 3, and the total weight is 1Kg. After mechanically mixing evenly, use a press machine at 35kg / cm 2 It is pressed into cakes under a certain pressure and then sintered at 1600°C for 15 hours in a neutral nitrogen atmosphere. The furnace is vacuumed and filled with high-purity nitrogen, and the temperature is raised to melt and prepare for growth. The pulling speed was 1 mm / h, and the rotation speed was 15 rpm. After growing the crystal, it was slowly lowered to room temperature, and the crystal was taken out. The crystals are blue-green, complete and of good quality.

Embodiment 2

[0019] Will Yb 2 o 3 , Y 2 o 3 , Al 2 o 3 , Cr 2 o 3 and CaCO 3 The high-purity raw material is weighed according to x=0.05, y=0.0005, z=5y / 3, and the total weight is 1Kg. After mechanically mixing evenly, use a press machine at 20kg / cm 2 It is pressed into a cake under a certain pressure and then sintered at 1300°C for 10 hours in a neutral nitrogen atmosphere. The furnace is vacuumed and filled with high-purity nitrogen, and the temperature is raised to melt and prepare for growth. The pulling speed was 1 mm / h, and the rotation speed was 12 rpm. After growing the crystal, it was slowly lowered to room temperature, and the crystal was taken out. The crystals are blue-green, complete and of good quality.

Embodiment 3

[0021] Will Yb 2 o 3 , Y 2 o 3 , Al 2 o 3 , Cr 2 o 3 and CaCO 3 The high-purity raw material is weighed according to x=0.05, y=0.0005, z=10y / 3, and the total weight is 1Kg. After mechanically mixing evenly, use a press machine at 40kg / cm 2 It is pressed into a cake under a certain pressure and then sintered at 1400°C for 18 hours in a neutral nitrogen atmosphere. The furnace is vacuumed and filled with high-purity argon, and the temperature is raised to melt and prepare for growth. The pulling speed was 1.5 mm / h, and the rotation speed was 18 rpm. After growing the crystal, it was slowly lowered to room temperature, and the crystal was taken out. The crystals are blue-green, complete and of good quality.

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PUM

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Abstract

A method for preparing yttrium aluminum garnet crystals doped with Yb3+ and Cr4+ ions. The raw materials of the method are formulated according to the following reaction equation: 3xYb2O3+3(1-x-z)Y2O3+5(1-y)Al2O3+5yCr2O3+ 6zCaCO3=2Yb3xY3(1-x-z) Cr5yCa3zAl5(1-y) O (12-3z / 2) +6zCO2 in which 0.05≤x≤0.5, 0.01%≤y≤2%, y≤z≤5y, in common The medium frequency induction heating single crystal furnace adopts the pulling method to grow. The method of the invention is easy to grow the yttrium aluminum garnet crystal of Yb3+ and Cr4+ ions, and the crystal can be directly pumped by an InGaAs semiconductor laser to realize the excitation output of 1.1-1.6 μm, and can improve the laser performance of the crystal.

Description

technical field [0001] The invention relates to a tunable laser crystal, especially a Yb-doped 3+ and Cr 4+ Preparation of ionic yttrium aluminum garnet crystals. Background technique [0002] Doped with Cr 4+ Ion laser crystal (Cr 4+ :Mg2SiO 4 、Cr 4+ :YAG) to succeed Ti:Al 2 o 3 After the crystal (0.6-1.1 μm), it is expected to realize tunable, ultra-fast laser output and passive modulation important laser crystal materials in the 1-1.6 μm band. Cr 4+ As a new luminescent center, its unique tuning band fills the gap in the near-infrared band of solid-state tunable lasers, supplemented by laser frequency doubling technology, which can be combined with Ti:Al 2 o 3 Together, the wavelength can be tunable from 600-1600nm. Cr 4+ Lasers can be widely used in optical communication, medicine, light radar, remote sensing, infrared high resolution, laser technology, basic science and other fields. [0003] In 1993, American scholar H.Eilers and others realized Cr at room...

Claims

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Application Information

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IPC IPC(8): C30B15/00C30B29/28
Inventor 徐军徐晓东赵志伟宋平新周国清周圣明苏良碧
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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