Generator of terahertz by oscillator with acyclic polarized crystal and double-wavelength optical parameter

A polarized crystal and optical parameter technology, applied in the direction of lasers, masers, laser components, etc., can solve the problems of inconvenient optical path adjustment, complex optical system, and low conversion efficiency, and achieve easy assembly and high conversion efficiency , Easy to adjust the effect of light path

Inactive Publication Date: 2006-03-15
TIANJIN UNIV
View PDF0 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The conversion efficiency of the above method is low, the opt

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
  • Generator of terahertz by oscillator with acyclic polarized crystal and double-wavelength optical parameter
  • Generator of terahertz by oscillator with acyclic polarized crystal and double-wavelength optical parameter
  • Generator of terahertz by oscillator with acyclic polarized crystal and double-wavelength optical parameter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The parameters of each optical device are introduced in detail below. Semiconductor laser 1-1 has a central wavelength of 808nm at 25°C, a spectral line width of 2.5nm, a fiber core diameter of 400μm, and a numerical aperture of 0.22. It has its own temperature control and cooling system. The optical coupling lens group 1-2 couples the 808nm pump light output by the optical fiber into the Nd:YAG crystal, requiring the diameter of the focused spot to be 10mm, and the loss to be <10%. The laser cavity adopts a flat-flat cavity structure with a simple structure. The 808nm light output by the semiconductor laser passes through the coupling system 1-2 and then pumps the Nd:YAG crystal 1-3. The input mirror is coated with 808nm and 1064nm anti-reflection coatings at the output end. The Nd:YAG crystal size is 3mm×3mm×5mm, and the doping concentration is 0.5atm%. The temperature of the crystal is controlled at 22.5°C by a constant temperature water circulator. In order to incr...

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

No PUM Login to view more

Abstract

The invention includes pumping source, optical couple lenses, input mirror and output mirror, nonlinear crystal C2 and its temperature controlling stove. Aperiodic poled Lithium Niobate crystal C1 is mounted between input mirror and output mirror and its temperature controlling stove with 100 Deg C.-200 Deg C. working temperature. When the pump beam lambdap = 1064 nm, the aperiodic poled crystal takes two signal beams lambda1=1500nm and lambda2=1510nm to make incidence to non linear crystal C2. 1450-1550nm reflection reducing coating film is coated on end face of non linear crystal. Poled period is 35um,a=23DEG. When working temperature of temperature controlling stove of Non linear crystal C2 is 100 Deg C.-200 Deg C., the frequency range produced by difference frequency of non linear crystal C2 is 1.19THz-1.45THz Terahertz wave.

Description

technical field [0001] The invention relates to a device for generating terahertz by a non-periodically polarized crystal dual-wavelength optical parametric oscillator, which belongs to the technology for generating a terahertz wave source. Background technique [0002] Terahertz (terahertz, 1THz = 10 12 Hz) frequency band refers to the electromagnetic radiation area between millimeter wave and infrared light with a frequency from 0.3THz to 10THz. This is a very scientifically valuable but unexplored area of ​​electromagnetic radiation. For a long time, due to the lack of effective terahertz generation and detection methods, people's understanding of the properties of electromagnetic radiation in this band is very limited, so that this band is called the terahertz gap in the electromagnetic spectrum, and it is also a part of the electromagnetic spectrum that needs to be fully studied The last frequency window. [0003] The reason why terahertz technology has attracted wid...

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): H01S1/00H01S3/00
Inventor 姚建铨纪峰张百钢路洋张铁犁王涛
Owner TIANJIN UNIV
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