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Neodymium ion doped fluoride laser crystal

A laser crystal, fluoride technology, applied in the direction of crystal growth, single crystal growth, single crystal growth, etc., can solve the problems of strong fluorescence, quenching effect, inability to obtain laser output, etc., achieve rich lattice structure, promote non-uniformity widening effect

Inactive Publication Date: 2012-07-04
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the special crystal structure, Nd 3+ Ion-doped dianion fluoride crystals (MeF 2 , Me=Ca, Sr, Ba, Cd, Pb, etc.) often have broadband absorption and emission spectra, but due to the Nd 3+ Cluster structures are particularly easy to form in such crystals, resulting in a strong fluorescence quenching effect that prevents practically meaningful laser output.

Method used

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  • Neodymium ion doped fluoride laser crystal
  • Neodymium ion doped fluoride laser crystal
  • Neodymium ion doped fluoride laser crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1, growing 0.5%Nd, 0.5%Na:CaF by crucible drop method 2 Crystal:

[0034] Weighing NdF to scale 3 (5N) 2.56g, NaF(5N) 0.53g, CaF 2 (5N)196.20g and PbF 2 (5N) 2.0 g. Mix well in a vacuum glove box, place in a graphite crucible, and use pure CaF in the direction as the seed crystal 2 Crystal, the size of the seed crystal is: Φ5.8*30mm. The crucible drop method is used to grow the crystal, the atmosphere is a high-purity argon atmosphere, the raw material is melted at 1430°C and the growth starts, the crucible drop rate is 1mm / h, and the crystal growth is completed after 250h, and then press Cool down to room temperature at 15°C / h. After testing, the emission bandwidth of the sample at 1058nm is 9nm, and the fluorescence lifetime is 1.41ms.

Embodiment 2

[0035] Embodiment 2, growth of 0.5% Nd by crucible drop method, 3% K:SrF 2 Crystal:

[0036] Weighing NdF to scale 3 (5N) 2.56g, KF (5N) 1.60g, SrF 2 (5N)195.1g and PbF 2 (5N) 2.0g. Fully mixed in a vacuum glove box, placed in a graphite crucible, the seed crystal is pure SrF in the direction 2 Crystal, seed size: Φ6*28mm. The crucible descending method is used to grow crystals, the atmosphere is high vacuum, and the vacuum degree is 2.5×10 -3 Pa, 1490°C melts the raw material and starts to grow, the crucible descends at a rate of 1.5mm / h, the crystal growth is completed after 260h, and then cools down to room temperature at 20°C / h. After testing, the emission bandwidth of the sample at 1057nm is 8nm, and the fluorescence lifetime is 5.17ms.

Embodiment 3

[0037] Example 3, 1% Nd, 1% Rb: BaF grown by temperature gradient method 2 the crystal

[0038] Weighing NdF to scale 3 (5N)4.59g, RbF(5N)0.96g, BaF 2 (5N)174.45g and PbF 2 (5N) 1.8 g. Mix well in a vacuum glove box and place in a graphite crucible. The temperature gradient method is used to grow crystals, the atmosphere is high vacuum, and the vacuum degree is 1×10 - 3 Pa, the raw material is melted at 1380°C and begins to grow, the cooling rate is 2°C / h to 1200°C and the crystal growth is completed, and then the temperature is cooled to room temperature at 25°C / h. After testing, the emission bandwidth of the sample at 1056nm is 14nm, and the fluorescence lifetime is 1.58ms.

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Abstract

The invention relates to a neodymium ion doped fluoride laser crystal, and the fluoride laser crystal of MeF2 is doped with monovalent cation M+ which is doped together with the neodymium ion Nd3+. According to the invention, monovalent cation M+ is doped together in Nd:MeF2 crystal; with the proviso that the broadband emmission spectrum characteristic is ensured, the fluorescence quenching effect of Nd ions is reduced, and the fluorescence life is increased.

Description

technical field [0001] The invention belongs to the field of artificial crystals and laser materials, and in particular relates to a new laser crystal material. Background technique [0002] After half a century of development in laser science and technology, super-intensive and ultra-short pulse lasers are at the forefront of its development. Ultra-intensive and ultra-short lasers provide new experimental means and extreme physical conditions for human scientific research, and promote the development of multiple natural basic sciences such as physics, chemistry, biology, and materials to a deeper level, as well as the progress of information science and technology. At present, ultra-intense and ultra-short laser technology is developing towards a new generation, all-LD pumping method, and the laser media used are mainly Nd-doped glass and Yb-doped crystal. [0003] Among them, Yb 3+ ion 4f 13 The electron orbitals are strongly coupled to the crystal field, resulting in b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/12C30B15/00C30B11/00
Inventor 苏良碧李红军徐军王庆国郑丽和钱国兴姜大朋唐慧丽
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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