Unlock instant, AI-driven research and patent intelligence for your innovation.

A cesium terahertz collimated light source device and system

A technology of terahertz collimation and light source device, applied in the field of terahertz light source, can solve the problems of fixed wavelength, large volume, high cost, etc., and achieve the effect of excellent beam quality

Active Publication Date: 2021-05-25
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the synchrotron radiation light source and the free electron laser have excellent performance, but the cost is high; the carbon dioxide pumped gas laser has a large output power, but the volume is large, the debugging is complicated, and the wavelength is fixed; the QCL laser output power is small. The difference frequency laser and optical parametric oscillator can output terahertz laser with adjustable frequency. However, the device is relatively complicated, requiring precise installation and debugging, and has high requirements for operators.

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
  • A cesium terahertz collimated light source device and system
  • A cesium terahertz collimated light source device and system
  • A cesium terahertz collimated light source device and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: A cesium terahertz collimated light source

[0035] The device diagram of embodiment one is as figure 1 , and works as figure 2 shown. The cesium vapor generating device in the first embodiment is a cesium vapor pool 1, which is a cylindrical container made of quartz glass. The diameter of the cylinder is 20 to 30 mm, the length is 100 mm or longer, and the two ends of the cylinder are quartz glass with a thickness of 1 mm. The optical windows, that is, the entrance window 1-1 and the exit window 1-2, have a high transmittance to the pump laser light, and a considerable transmittance to the terahertz band. The cesium vapor pool is filled with enough metallic cesium to ensure that the cesium vapor vaporized inside is at the saturated vapor pressure when heated. There is no gas other than cesium vapor inside the cesium vapor cell. A surrounding heating furnace is used to uniformly heat the entire cesium vapor pool to 200°C or even higher, and a constant...

Embodiment 2

[0040] Embodiment 2: Cesium Terahertz Collimated Light Source Based on Stimulated Electron Raman Scattering

[0041] The device of embodiment two is the same as embodiment one, and the working principle is as image 3 shown. The pump laser 3 output by the pump source 2 in the second embodiment is in the form of a coaxial pulse pair, that is to say, each time the pump source 2 works, it will first output an 852nm pulse, and then output a 550nm pulse after a time T pulse. Each pulse can contain 2E+14 photons, the pulse width is 3ns, the wavelength can be finely adjusted, and T can also be adjusted, for example, it can be set to 30ns. Adjust the 852nm pulse wavelength to precisely align with the 6 of the cesium atom 2 S 1 / 2 →6 2 P 3 / 2 Transition absorption, at this time, there are a large number of cesium atoms in the pumped part of the cesium vapor in the cesium vapor pool 2 P 3 / 2 energy level. Adjust the wavelength of the subsequently arriving 550nm pulse to approximat...

Embodiment 3

[0047] Embodiment Three: Cesium Terahertz Collimated Light Source with 1.6THz Output

[0048] The third embodiment is based on the second embodiment, and the 550nm pulse in the pump laser 3 is adjusted to a 564nm pulse, then the tunable forward terahertz laser 4-1 and backward terahertz laser 4 near 1.6THz can be obtained -2. Implementation principle and Figure three Basically the same, except for 6 2 P 3 / 2 The three energy levels other than 11 2 D. 5 / 2 、12 2 P 3 / 2 、10 2 D. 5 / 2 Replaced by 10 in turn 2 D. 5 / 2 、11 2 P 3 / 2 ,9 2 D. 5 / 2 , that is to say, for the involved physical processes, the principal quantum numbers of the relevant energy levels are all reduced by one. The sign that the optical path is adjusted is 9 2 D. 5 / 2 →6 2 P 3 / 2 Near resonance 585nm forward visible light.

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 a cesium terahertz collimated light source device and system. The device includes a cesium vapor pool and a pump source; wherein the pump source generates collimated pump laser light, and the cesium vapor pool has an entrance window and / or an exit window. There is cesium vapor inside the vapor cell, and the pump laser enters the cesium vapor cell through the entrance window, and then enters the cesium vapor; under the action of the pump laser, the cesium vapor produces terahertz collimated light, which is output from the entry window and / or exit window . In the invention, the optically pumped particle number inversion stimulated radiation in cesium vapor is induced by the pump laser, or the optically pumped stimulated electron Raman scattering Stokes output, or the optically pumped stimulated super Raman scattering Stokes Max output to obtain terahertz collimated light, the beam quality is excellent, and can be used as a terahertz laser.

Description

technical field [0001] The invention relates to the field of terahertz light sources, in particular to a cesium terahertz collimated light source device and system. Background technique [0002] The terahertz band of electromagnetic waves usually refers to the 0.1-3THz frequency band, which is between far-infrared light and microwaves. Terahertz light has many unique properties, which has attracted extensive attention from scientific research and industry in recent years. The wavelength of terahertz light is on the order of millimeters, which is smaller than that of objects in daily life. Therefore, the transmission of terahertz light can be well collimated, similar to visible light. Moreover, terahertz light has high penetrability to common water-free non-metallic materials, such as paper, plastic, wood, ceramics, etc., and its penetrability is much better than that of visible light, near-infrared light, and mid-infrared light. , so it can be used in fields such as secur...

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 Patents(China)
IPC IPC(8): H01S1/06
CPCH01S1/06
Inventor 郭敬为盖宝栋刘金波
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI