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Wide-tuning ultrafast laser crystal material and application thereof

An ultrafast laser, crystal material technology, applied in the growth of polycrystalline materials, crystal growth, single crystal growth and other directions, can solve the problem of not wide enough tuning range, difficult to meet, high laser threshold, to achieve wide tuning characteristics, low laser valve value, the effect of realizing miniaturization

Inactive Publication Date: 2011-06-08
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

[0003] However, due to the Yb:YAG crystal currently in service, the tuning range is not wide enough, and the laser threshold is high, which cannot meet the requirements of ultrafast lasers. Chengfeng Yan et al. in Journal of Physics: Condensed Matter, 18(2006): 1325 and Solid State Communications ,, 137 (2006) pointed out that the tuning width of Yb:YAG crystal is only about 20nm, which is obviously difficult to meet the requirements of realizing low-threshold wide-tuning ultrafast laser directly pumped by LD

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] According to the molecular formula, the ratio of raw materials is carried out, and Yb is grown by pulling method 12x : Bi 12(1-x) SiO 20 Crystal, take x=0.5% in the ratio of raw materials. Firstly, high-purity bismuth oxide, silicon oxide and ytterbium oxide are weighed according to the above ratio, mechanically mixed evenly, sintered in a muffle furnace at 1000-1600°C, loaded into a single crystal growth furnace, vacuumed, and filled with nitrogen to carry out crystal growth. After growing the crystal, it was slowly lowered to room temperature, and the crystal was taken out. It was checked that the concentration of Yb ions was evenly distributed, and the optical properties of the crystal were very good.

Embodiment 2

[0016] According to the molecular formula, the ratio of raw materials is carried out, and the Yb obtained by the crucible descending method is grown. 12x : Bi 12(1-x) SiO 20 Crystal, take x=5% in the ratio of raw materials. Firstly, high-purity bismuth oxide, silicon oxide and ytterbium oxide are weighed according to the above ratio, mechanically mixed evenly, sintered in a muffle furnace at 1000-1600°C, loaded into a single crystal growth furnace, vacuumed, and filled with nitrogen to carry out crystal growth. After growing the crystal, it was slowly lowered to room temperature, and the crystal was taken out. It was checked that the concentration of Yb ions was evenly distributed, and the optical properties of the crystal were very good.

Embodiment 3

[0018] use Yb 12x : Bi 12(1-x) SiO 20 The crystal is processed into Φ20×5mm, the two circular surfaces of the crystal are polished and coated, and the laser system is built by using 940nm LD pump to obtain a solid-state laser with 930-1100nm wide tuned laser output.

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Abstract

The invention relates to a wide-tuning ultrafast laser crystal material and application thereof. The wide-tuning ultrafast laser crystal material is characterized in that the laser crystal material consists of ytterbium ion doped bismuth silicate laser crystals (Yb: Bi12SiO20, Yb: BSO for short). Yb ions have large energy level splitting in the BSO laser crystals so that the material has a low laser threshold and a large tuning width in laser application. The growth of the Yb: BSO crystals can be obtained by adopting various crystal growth methods such as a pulling method, a Bridgman method, a zone melting method and the like. The excellent laser optical characteristics of the Yb: BSO crystals realize a laser diode (LD) direct pumped low-threshold wide-tuning ultrafast laser, so that lasers are simpler and more miniature.

Description

technical field [0001] The invention relates to a wide tuning ultrafast laser crystal material (Yb:Bi 12 SiO 20 , hereinafter referred to as Yb:BSO) and its application. Background technique [0002] Diode-pumped femtosecond lasers are laser sources that generate high peak power and high repetition rate pulses. It has the characteristics of compact structure, economy and full curing. Laser materials doped with Yb ions for low-threshold wide-tunable high-power ultrafast lasers will be the focus of research on Yb laser materials in the future, and have very important strategic significance for the development of all-solid-state high-performance lasers. Tunable laser refers to a laser that can continuously change the laser output wavelength within a certain range. It is one of the important development directions of current laser technology and can be used in spectroscopy, photochemistry, medicine, biology, integrated optics, pollution monitoring, Semiconductor material pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/34H01S3/06
Inventor 姜本学潘裕柏李江石云刘文斌
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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