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Cross-polarization double-wavelength laser device

A dual-wavelength laser and laser technology, applied in the field of lasers, can solve problems such as low power and efficiency, and achieve the effect of improving power and efficiency

Inactive Publication Date: 2013-04-03
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention aims at the above-mentioned problems existing in the prior art, and provides a high-power, simple-structured orthogonally polarized dual-wavelength laser with a dual-wavelength difference of less than 10 nm, so as to solve the problem of low power and low efficiency when the difference-frequency technique generates THz waves

Method used

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example 1

[0017] figure 2 A first embodiment of the present invention is shown. The pump source 1 is a semiconductor laser with an output wavelength of 976nm. The pump source focusing system 2 uses two plano-convex mirrors to focus the laser light onto the laser crystal 4, which is doped with Yb 3+ ionic 10% concentration of Ca 3 La 2 (BO 3 ) 4 The crystal is used as the laser gain medium, and the cut size is 3×3×3mm 3 The crystal, the crystal direction Z tangential direction, and the two sides of the light-passing direction are polished. The laser crystal 4 is wrapped with indium foil and placed in a copper block. Cooling water is passed through the copper block to keep the water temperature at 15-18 ° C. The input mirror 3 is a plane mirror, coated with an input film, and the film parameters are T>90%976nm, R>99.9% (1050-1070nm); the output mirror 5 is a plano-concave output mirror, and the film parameters are T=3% (1050-1070nm) ), the focal length is R=-50mm, and the cavity l...

example 2

[0019] image 3 shows a second embodiment of the invention, except that the position of 5 is replaced by the addition of Cr 4+ :YAG crystal (Cr 4+ : The initial transmittance of the YAG crystal is 96%, and the thickness is 1mm), and the cavity length of the laser becomes 5 centimeters, and the others are the same as the first embodiment. This embodiment is to add Cr on the basis of the first embodiment 4+ :YAG crystal is used as a passive Q-switching element to realize efficient orthogonally polarized dual-wavelength passive Q-switched pulsed laser output. The output mirror 6 is a plano-concave output mirror, and the film parameters are consistent with those of the first embodiment.

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Abstract

The invention provides a cross-polarization double-wavelength laser device relating to the field of laser devices. According to the cross-polarization double-wavelength laser device, a Yb:Ca3La2(BO3)4 crystal is adopted as a laser gain medium, and semiconductor laser devices or other light sources are taken as pumping sources to respectively obtain cross-polarization double-wavelength laser output at 1054nm(E / / x) and 1059nm(E / / y) through a continuously and passively Q-switching laser technology.

Description

technical field [0001] The invention relates to the field of lasers. Background technique [0002] Dual-wavelength laser can be widely used in optical communication, photodynamic medical treatment, optical computing, nonlinear frequency conversion, environmental monitoring, laser remote sensing, lidar and spectroscopy, etc. Linear optical difference frequency technology performs difference frequency on dual-wavelength lasers to generate terahertz waves. The interaction between terahertz waves and matter contains rich physical and chemical information, and has unique and excellent characteristics such as coherence, low energy, high penetration, and no damage. Basic and applied research fields such as inspection, medical imaging, environmental monitoring, food inspection, radio astronomy, satellite communication, and weapon guidance all have great scientific research value and broad application prospects, but are still an area of ​​electromagnetic radiation that has not yet b...

Claims

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Application Information

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IPC IPC(8): H01S3/16H01S3/108
Inventor 涂朝阳王烨青游振宇朱昭捷王燕李坚富
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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