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Lutecium lithium fluoride intermediate infrared laser crystal of dysprosium activated

A technology of infrared laser and lutetium lithium fluoride, which is applied in crystal growth, single crystal growth, single crystal growth, etc., can solve the problems of high passive loss of laser and low frequency of mid-infrared laser

Inactive Publication Date: 2007-12-19
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main problem of laser crystals directly producing high-efficiency mid-infrared laser output is: because the mid-infrared laser frequency is very low, it is equivalent to the lattice vibration frequency of many famous laser crystals, that is, the phonon vibration frequency, which leads to rapid non-radiative relaxation and laser emission. The strong competition of , thus, leads to high passive loss of the laser
At present, there is no LiLuF at home and abroad 4 : Dy 3+ and LiLuF 4 : Dy 3+ :yb 3+ Reported as a mid-infrared laser crystal

Method used

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  • Lutecium lithium fluoride intermediate infrared laser crystal of dysprosium activated

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: LiLuF 4 :Dy 3+ Crystal growth preparation

[0016] First, the raw materials LiF and LuF 3 Processing: Put an appropriate amount of analytically pure LiF and LuF respectively 3 The raw materials are put into a self-made sintering furnace, and high-purity argon and CF are introduced 4 Let it flow slowly, heat it to 800°C, then lower the temperature, and store the raw materials for later use.

[0017] Grow high-quality LiLuF by lifting method 4 Crystal. Press 50mol% LiF and 50mol% LuF 3 Accurately weigh 200g, grind and mix evenly, press tablets, and put the raw materials into an iridium crucible of Ф55mm×30mm. The instrument used for crystal pulling method growth is an intermediate frequency pulling furnace of DJL-400, and the intermediate frequency power supply model is KGPF25-0.3-2.5. The temperature is controlled by Pt / Pt-Rh thermocouple and Eurometer model 815EPC. First extract the gas in the furnace so that the pressure in the furnace reaches 10-3Pa, and then p...

Embodiment 2

[0018] Example 2: LiLuF 4 :Dy 3+ Mid-infrared laser experiment of crystal

[0019] Cut out a certain size, high-quality LiLuF 4 :Dy 3+ Laser devices, and conduct absorption and emission spectroscopy testing and research, determine the specific pump source and laser emission wavelength, according to these wavelength data, carry out the coating of the resonant cavity mirror, design a suitable laser resonant cavity, and use the ~1.34μm band Pumped by a suitable pump source to perform laser experiments to achieve tunable mid-infrared laser output in the 3.0μm~5.0μm band.

[0020] The experimental device is shown in the attached drawing. 1 in the picture is block LiLuF 4 Color center laser crystal; 2 is a suitable pump source for the wavelength of ~1.34μm; 3 is a dielectric mirror that totally reflects the wavelength of λ=3000nm~5000nm and transmits the wavelength of ~1.34μm; 4 is a partial transmission of wavelength of λ=3000nm~5000nm And the dielectric mirror with total reflection in...

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Abstract

In this invention, LiLuF4 is used as laser raw host material, Dy3+ is used as active ions, to produce LiLuF4: Dy3+ laser crystal. And also LiLuF4 is used as laser raw hast material, Dy3+ as active ions, Yb3+ as used as sensitizing ions to produce the invented product LiLuF4: Dy3+: Yb3+ laser crystal. Said crystals are used for realization of tunable output of middle infrared laser at 3.0-5.0 micron wave band.

Description

Technical field: [0001] The invention relates to the field of laser crystal materials, in particular to a type of mid-infrared laser crystal LiLuF 4 :Dy 3+ And LiLuF 4 :Dy 3+ :Yb 3+ . Background technique: [0002] The 3.0μm-5.0μm mid-infrared laser can be operated by several methods. Among them, the direct generation of mid-infrared radiation by laser crystals activated by rare earth or transition group ions is the simplest and most effective method, and it is the current research hotspot. [0003] The main problem that laser crystals directly produce high-efficiency mid-infrared laser output is: because the frequency of mid-infrared lasers is very low, it is equivalent to the lattice vibration frequency of many famous laser crystals, that is, the phonon vibration frequency, which leads to rapid non-radiation relaxation and laser emission. The strong competition of the laser, therefore, leads to high passive loss of the laser. In order to overcome this problem, materials with lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/12C30B15/00H01S3/16
Inventor 涂朝阳李坚富王燕游振宇朱昭捷吴柏昌
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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