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Yb-dopped strontium-lanthanum aluminate-tantalate laser crystal and its prepn

A technology of laser crystal and tantalum acid, which is applied in crystal growth, chemical instruments and methods, single crystal growth, etc., can solve the problems that the research of laser gain medium has not been reported yet.

Inactive Publication Date: 2007-12-05
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, ytterbium-doped aluminum strontium lanthanum tantalate crystals (Yb 3+ :(La,Sr)(Al,Ta)O 3 ) as a laser gain medium has not been reported yet

Method used

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  • Yb-dopped strontium-lanthanum aluminate-tantalate laser crystal and its prepn
  • Yb-dopped strontium-lanthanum aluminate-tantalate laser crystal and its prepn

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Embodiment 1

[0024] The preparation method of the ytterbium-doped aluminum lanthanum strontium tantalate laser crystal of the present invention comprises the following steps:

[0025] ①Select the value of x, according to the molecular formula (Yb x La (0.3-x Sr 0.7 )(Al 0.65 Ta 0.35 )O 3 The raw materials are weighed according to the stoichiometric ratio, and the initial raw materials in the crystal growth recipe are:

[0026] La 2 O 3 (4N), SrCO 3 (4N), Al 2 O 3 (5N), Ta 2 O 5 (5N) and Yb 2 O 3 (5N), the concrete chemical reaction equation is as follows:

[0027] (0.3-x)La 2 O 3 +1.4SrCO 3 +0.65Al 2 O 3 +0.35Ta 2 O 5 +x Yb 2 O 3

[0028] →2(Yb x La (0.3-x Sr 0.7 )(Al 0.65 Ta 0.35 )O 3 +1.4CO 2 ,

[0029] ②Mix the weighed raw materials evenly, press them into tablets, put them in an alumina crucible, put them in a muffle furnace, and sinter them at a constant temperature of 1200°C for more than ten hours to synthesize;

[0030] ③The synthesized Yb:(La,Sr)(Al,...

Embodiment 2

[0033] In the raw material ratio of this embodiment, x=2.0 at%. will La 2 O 3 (4N), SrCO 3 (4N), Al 2 O 3 (5N), Ta 2 O 5 (5N) and Yb 2 O 3 (5N) The high-purity raw material oxide powder is properly pre-dried in the air, then weighed strictly according to the stoichiometric ratio, fully mixed, and pressurized into a block with a diameter slightly smaller than the inner diameter of the crucible, above 1200 ℃ in air After pre-sintering at high temperature for 15 hours, it was loaded into an iridium crucible to start crystal growth. The crystal growth direction is , the crystal growth rate and the crystal rotation rate are 1.5mm / h and 15rpm, respectively, and the growth atmosphere is N 2 Protective atmosphere. The initial solid-liquid interface growth line is convex toward the melt, so faults and impurities are reduced, after which the growth boundary becomes flat. In order to prevent crystal cracking, the temperature was lowered to room temperature at a rate of 50 °C / h...

Embodiment 3

[0035] In the raw material ratio of this embodiment, x=0.5at%. will La 2 O 3 (4N), SrCO 3 (4N), Al 2 O 3 (5N), Ta 2 O 5 (5N) and Yb 2 O 3 (5N) The high-purity raw material oxide powder is properly pre-dried in the air, then weighed strictly according to the stoichiometric ratio, fully mixed, and pressurized into a block with a diameter slightly smaller than the inner diameter of the crucible, above 1200 ℃ in air After pre-sintering at high temperature for 10 hours, it was loaded into an iridium crucible to start crystal growth. The crystal growth direction is , the crystal growth rate and the crystal rotation rate are 2mm / h and 12rpm, respectively, and the growth atmosphere is N 2 Protective atmosphere. The initial solid-liquid interface growth line is convex toward the melt, so faults and impurities are reduced, after which the growth boundary becomes flat. To prevent crystal cracking, the temperature was lowered to room temperature at a rate of 60 °C / h after the g...

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Abstract

The present invention is Yb-dopped strontium-lanthanum aluminate-tantalate laser crystal and its preparation. The Yb-dopped strontium-lanthanum aluminate-tantalate laser crystal has the structural expression of (YbxLa(0.3-x)Sr0.7)(Al0.65Ta0.35)O3, where, x is the Yb3+ dopping concentration and is equal to 0.1-10 at.%. The preparation process of the Yb-dopped strontium-lanthanum aluminate-tantalate laser crystal includes the following steps: 1. selecting x value and weighing materials; 2. mixing the materials, tabletting, setting the tablets inside crucible, setting the crucible in muffle furnace, and sintering at 1200 deg.c for 10 hr to synthesize; and 3. growing the crystal in Czochralski process. The present invention has the advantages of wide absorption band, long fluorescence life, etc. and is expected to obtain 1100 nm laser output via diode pumping.

Description

technical field [0001] The invention relates to the field of artificial crystal and crystal growth in the technical field of optoelectronic functional materials, in particular to a ytterbium-doped aluminum lanthanum strontium tantalate Yb 3+ :(La,Sr)(Al,Ta)O 3 Laser crystal and preparation method thereof. Background technique [0002] In 1960, Maiman made the first ruby ​​pulsed laser, which marked the birth of laser technology. Since then, laser technology has developed very rapidly. Since the 1990s, with the improvement of the output power and stability of the pump source InGaAs diode (emission wavelength of 0.9-1.1 μm), the absorption band of the ytterbium-doped laser material just matches it, and people have paid attention to the high efficiency, high power, and miniaturization of lasers. , the pursuit of integration, which led to the rise of Yb-doped 3+ Research on laser materials. [0003] For ytterbium-doped laser materials, it has the following advantages: Yb 3...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/22C30B15/00H01S3/16
Inventor 杭寅朱月芹张连翰宋词
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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