Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Er and Dy co-doped lead fluoride mid-infrared laser crystal and preparation method and application thereof

An infrared laser and lead fluoride technology, applied in chemical instruments and methods, crystal growth, single crystal growth, etc., can solve the problems of complex nonlinear conversion system, strong nonlinear effect, low conversion efficiency, etc. The effect of radiation transition probability, small polyhedron distortion, and low refractive index

Pending Publication Date: 2022-08-02
TONGJI UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) Through nonlinear means such as sum frequency, difference frequency, optical parametric oscillation, etc., but the method of nonlinear conversion has the disadvantages of complex system and low conversion efficiency
(3) Realized by semiconductor lasers with semiconductor materials as the active medium, the spectral range covers ultraviolet to far infrared, but the beam quality is poor, and it needs to be operated at low temperature
However, ZBLAN fluoride glass fiber is easy to deliquescence, the material is fragile, difficult to polish and weld, and thermal effects such as thermal lens and thermally induced birefringence caused by low thermal conductivity will cause laser beam distortion, strong nonlinear effects, and stimulated scattering Serious impact on the system

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Er and Dy co-doped lead fluoride mid-infrared laser crystal and preparation method and application thereof
  • Er and Dy co-doped lead fluoride mid-infrared laser crystal and preparation method and application thereof
  • Er and Dy co-doped lead fluoride mid-infrared laser crystal and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of Er, Dy co-doped lead fluoride mid-infrared laser crystal and preparation method thereof, its chemical formula is Er 0.04 Dy 0.002 Pb 0.958 F 2 , the preparation method is as follows:

[0037] Er growth by temperature gradient method 0.04 Dy 0.002 Pb 0.958 F 2 For crystals, put 50g of raw materials in a graphite crucible, install the furnace and vacuumize, fill with high-purity argon gas as a protective atmosphere, raise the temperature at a rate of 200 °C / h to 840 °C, and keep the temperature for 10 hours until the raw materials are completely melted and impurities are fully removed, During the growth process, the slow cooling growth was carried out at a rate of 1.5 °C / h. After the growth was completed, the temperature was lowered to room temperature at 50°C / h, and then the crystals were taken out. Obtain a piece of Er with better optical quality 0.04 Dy 0.002 Pb 0.958 F 2 crystal. Its absorption cross section at 980nm is as high as 0.162×10 –20 ...

Embodiment 2

[0044] A kind of Er, Dy co-doped lead fluoride mid-infrared laser crystal and preparation method thereof, its chemical formula is Er 0.04 Dy 0.005 Pb 0.955 F 2 , the preparation method is as follows:

[0045] Er growth by temperature gradient method 0.04 Dy 0.005 Pb 0.955 F 2 Crystal, starting material is ErF of 5N purity 3 , DyF 3 and PbF 2 Single crystal particles or powder. After selecting specific concentrations of Er ions and Dy ions to be doped to replace Pb ions, according to the chemical formula Er 0.04 Dy 0.005 Pb 0.955 F 2 Calculate the required mass of each raw material and weigh it accurately, put the weighed raw material into a porous graphite crucible and cover it with a circular graphite cover, install the furnace and vacuumize it, and fill it with high-purity argon as a protective atmosphere. The heating rate of ℃ / h was 840 ℃, and the temperature was kept constant for 10 hours until the raw materials were completely melted. After the growth was c...

Embodiment 3

[0047] A kind of Er, Dy co-doped lead fluoride mid-infrared laser crystal and preparation method thereof, its chemical formula is Er 0.06 Dy 0.002 Pb 0.938 F 2 , the preparation method is as follows:

[0048] Er growth by temperature gradient method 0.06 Dy 0.002 Pb 0.938 F 2 Crystal, starting material is ErF of 5N purity 3 , DyF 3 and PbF 2 Single crystal particles or powder. After selecting specific concentrations of Er ions and Dy ions to be doped to replace Pb ions, according to the chemical formula Er 0.06 Dy 0.002 Pb 0.938 F 2 Calculate the required mass of each raw material and weigh it accurately, put the weighed raw material into a porous graphite crucible and cover with a circular graphite cover, install the furnace and vacuumize, and fill it with high-purity argon as a protective atmosphere. The heating rate of ℃ / h was 840 ℃, and the temperature was kept constant for 10 hours until the raw materials were completely melted. After the growth was complet...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to an Er and Dy co-doped lead fluoride mid-infrared laser crystal and a preparation method and application thereof, the chemical formula of the crystal is ErxDyyPb1-x-yF2, the value range of x is 0.02-0.08, and the value range of y is 0.002-0.01; the crystal grows by adopting a temperature gradient method, and the method comprises the following steps: (1) taking single crystal particles or powder of ErF3, DyF3 and PbF2 as raw materials, calculating the mass required by each raw material according to the chemical formula ErxDyyPb1-x-yF2, and accurately weighing; (2) grinding and uniformly mixing the weighed raw material powder, then putting into a porous graphite crucible, and covering with a graphite cover; and (3) placing the porous graphite crucible filled with the material in a thermal field, vacuumizing, filling protective gas, heating to ensure complete material melting and impurity removal, cooling to carry out crystal growth, cooling to room temperature after the growth is finished, and taking out the crystal. Compared with the prior art, the crystal material can realize efficient mid-infrared laser output, and can be applied to the fields of remote sensing, detection, long-distance transmission, medicine and the like.

Description

technical field [0001] The invention relates to the technical field of laser materials, in particular to an Er, Dy co-doped lead fluoride mid-infrared laser crystal and a preparation method and application thereof. Background technique [0002] The mid-infrared band (2-5μm) has important research value and application prospects in the fields of medical treatment, environmental monitoring, remote sensing, laser communication and infrared countermeasures. At present, there are three main ways for mid-infrared laser output: (1) Direct emission through energy level transition by doping activated ions (rare earth ions or transition metal ions). (2) Through nonlinear means such as sum-frequency, difference-frequency, optical parametric oscillation, etc., the nonlinear conversion method has the disadvantages of complex system and low conversion efficiency. (3) Realized by semiconductor lasers with semiconductor materials as the active medium, the spectral range covers ultraviolet ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/12C30B27/00C30B28/06H01S3/16
CPCC30B29/12C30B27/00C30B28/06H01S3/1645
Inventor 徐军施张丽薛艳艳侯文涛王无敌王庆国
Owner TONGJI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com