Preparation method of quasi-phase matching crystals for improving CO2 laser frequency multiplication efficiency

A technology of quasi-phase-matching and frequency-doubling crystals, which is applied to lasers, laser components, phonon exciters, etc., can solve the problems of less inversion period, large optical loss, and small aperture, so as to improve conversion efficiency and The effect of output power

Inactive Publication Date: 2012-07-11
BEIJING UNIV OF TECH
View PDF2 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of less domain inversion period, small clear aperture and large optical loss in the current pr

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
  • Preparation method of quasi-phase matching crystals for improving CO2 laser frequency multiplication efficiency
  • Preparation method of quasi-phase matching crystals for improving CO2 laser frequency multiplication efficiency
  • Preparation method of quasi-phase matching crystals for improving CO2 laser frequency multiplication efficiency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] like figure 1 As shown, the quasi-phase matching frequency doubling device prepared by zinc selenide single crystal in the present invention, the device preparation process can be divided into three main steps. The first step needs to be oriented to select the direction and the direction of the crystal axis, and cut into thin slices. The thickness is determined by the incident wavelength; Bonded wafers.

[0019] The linear absorption coefficient of zinc selenide single crystal is only 0.0005cm -1 , which is an order of magnitude smaller than the commonly used birefringent frequency doubling crystal gallium selenide silver, three orders of magnitude smaller than phosphorus germanium zinc, and one order of magnitude smaller than quasi-phase-matched gallium arsenide crystal. The second-order nonlinear coefficient reaches 50pm / V, and the damage threshold is twice that of silver gallium selenide and 1.5 times that of gallium arsenide.

[0020] The material selected in th...

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
Thicknessaaaaaaaaaa
Login to view more

Abstract

A preparation method of quasi-phase matching crystals for improving CO2 laser frequency multiplication efficiency belongs to the field of laser and is characterized in that zinc selenide single crystals are regarded as quasi-phase matching frequency multiplication crystals, the zinc selenide single crystals are cut into a plurality of flakes with a thickness between 100 micrometer and 120 micrometer in the same specification along a perpendicular (110) direction of the zinc selenide single crystals, polarization directions of adjacent crystal flakes differ by 180 DEG, the surfaces of the crystal flakes are bombarded by hydrogen ion beam after being polished, the adjacent zinc selenide crystal flakes are combined firmly through a bonding technology, and multiple layers of crystal flakes are formed into an integration. Compared with existing common frequency multiplication methods, the method has the advantages that optical loss of devices is small, clear aperture can reach above 1 cm<2>, and conversion efficiency and output power of CO2 laser quasi-phase matching frequency multiplication crystals are improved greatly.

Description

technical field [0001] The invention relates to a quasi-phase matching frequency doubling device made of zinc selenide single crystal, which is used for CO 2 The frequency doubling of lasers produces mid-infrared lasers, which belongs to the field of nonlinear optical crystals. Background technique [0002] CO 2 Laser frequency-doubled light is in the mid-infrared band. Mid-infrared lasers have good atmospheric propagation characteristics. At the same time, they also have low molecular absorption coefficients and aerosol scattering coefficients at sea level. They are the infrared windows with the smallest attenuation in the atmosphere. Desired practical coherent light source. Effective against CO 2 Laser frequency doubling is of great significance for obtaining practical mid-infrared lasers with high power, small volume and high reliability. Compared with the birefringence matching method, the quasi-phase matching method can obtain higher conversion efficiency. The commo...

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
IPC IPC(8): H01S3/109G02F1/37
Inventor 李强罗旭雷訇惠勇凌姜梦华
Owner BEIJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap