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Pb<2+> ion-doped high temperature phase barium metaborate crystal and growing method and use thereof

A technology based on barium metaborate and ions, applied in the field of artificial crystal growth, can solve the problems of low light-to-light conversion efficiency, achieve good comprehensive performance, large birefringence, and lower threshold

Inactive Publication Date: 2015-04-22
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, compared to crystals with large Raman scattering cross-sections, under the same conditions, α-BaB 2 o 4 The light-to-light conversion efficiency of the crystal is also low

Method used

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  • Pb&lt;2+&gt; ion-doped high temperature phase barium metaborate crystal and growing method and use thereof
  • Pb&lt;2+&gt; ion-doped high temperature phase barium metaborate crystal and growing method and use thereof
  • Pb&lt;2+&gt; ion-doped high temperature phase barium metaborate crystal and growing method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Growth of Pb by Kyropoulos method 0.02 Ba 0.98 B 2 o 4 the crystal

[0021] Weigh analytically pure BaCO according to the stoichiometric ratio 3 , Pb 3 o 4 and H 3 BO 3 , and an excess of 2.5 mol% H 3 BO 3 . Put them into a corundum crucible after fully grinding and mixing them, put them into a muffle furnace, raise the temperature to 400°C and keep it warm for 12 hours, so that the H 3 BO 3 break down. The intermediate product obtained by the primary sintering is ground again, mixed evenly, placed in a corundum crucible, placed in a muffle furnace, heated to 1000°C and kept for 24 hours, naturally cooled to room temperature and taken out to obtain Pb 0.02 Ba 0.98 B 2 o 4 Crystal growth raw material. Its reaction equation is:

[0022] 2H 3 BO 3 =B 2 o 3 +3H 2 O↑

[0023] 0.02Pb 3 o 4 +2.94BaCO 3 +6H 3 BO 3 = 3Pb 0.02 Ba 0.98 B 2 o 4 +2.94CO 2 ↑+0.01O 2 ↑+9H 2 O↑

[0024] Put the obtained polycrystalline growth raw mater...

Embodiment 2

[0025] Example 2: Pb 0.02 Ba 0.98 B 2 o 4 Transmission Spectrum, Optical Damage Threshold, Birefringence and Raman Spectrum of Crystal

[0026] With the Pb obtained in Example 1 0.02 Ba 0.98 B 2 o 4 The single crystal was processed into a 5×5×1mm thin slice, and its UV-visible-infrared transmission spectrum was measured with a VARIAN CARY-5E spectrophotometer. The results showed that: Pb 0.02 Ba 0.98 B 2 o 4 The UV cut-off edge of the crystal is up to 200nm, and the infrared cut-off edge is at 2900nm.

[0027] With the Pb obtained in Example 1 0.02 Ba 0.98 B 2 o 4 Crystal, with a power density of 1GW / cm 2 , Nd:YAG laser irradiation with a pulse width of 10 ns and a repetition rate of 1 Hz, no damage occurred on the inside and surface of the crystal, indicating that Pb 0.02 Ba 0.98 B 2 o 4 The laser damage threshold of the crystal is not lower than 1GW / cm 2 .

[0028] The crystal obtained in embodiment 1 is processed into a prism and carried out a refractiv...

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Abstract

The invention discloses a Pb<2+> ion-doped high temperature phase barium metaborate crystal and a growing method and use thereof. The chemical formula of the crystal is PbxBa(1-x)B2O4, wherein x is the proportion that Pb<2+> ions replace Ba<2+> ions, and the value range is that x is greater than or equal to 0.005 but less than or equal to 0.05. The crystal can be grown by melt processes such as a pulling method, a kyropoulos method and a Bridgman method. The growing raw material of the crystal is PbxBa(1-x)B2O4 or PbxBa(1-x)B2O4 with excessive B2O3 not exceeding 10mol%. The crystal is stable in physical and chemical properties, good in machinability, wide in transparency range, great in photo damage threshold value and great in birefringence and the frequency in a stimulated Raman scattering (SRS) active vibration mode is about 635cm<->. The crystal can be used for preparing beam splitting polarizing components such as a Glan prism, a Wollaston prism, a Semarmont prism, a Rochon prism and the like as well as phase delay and optical compensating apparatuses; and the crystal can be used as an SRS crystal for converting frequency of laser in ultraviolet-visible-near-infrared bands.

Description

technical field [0001] The present invention relates to doped Pb 2+ Ionic high-temperature phase barium metaborate (α-BaB 2 o 4 ) crystal and its growth method and application, which belong to the field of artificial crystal growth technology and the field of laser technology. Background technique [0002] High temperature phase barium metaborate (α-BaB 2 o 4 ) crystal is a multifunctional optical material. It belongs to the trigonal crystal system, the unit cell parameters a=b=0.7235nm, c=3.9192nm, the space group is R-3c, and it is a negative uniaxial crystal. α-BaB 2 o 4 The crystal has good chemical stability, suitable hardness (Mohs hardness 4.5), wide light transmission band (from 189nm to 3500nm), large birefringence (Δn=0.14 at 532nm wavelength), high optical damage threshold (not less than 1.0 GW / cm 2 ), is currently the only birefringent crystal that has been applied in the ultraviolet band (Zhou Guoqing, Xu Jun, Chen Xingda, Chen Wei, Li Hongjun, Xu Ke, G...

Claims

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Application Information

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IPC IPC(8): C30B29/22C30B15/00C30B17/00C30B11/00G02B1/00
Inventor 万松明冯德玄唐小路张波
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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