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Research of Characteristic and Application of the Photoconductive Semiconductor Switches

Author: WuXin
Tutor: ShiShunXiang
School: Xi'an University of Electronic Science and Technology
Course: Physical Electronics
Keywords: Photoconductive switch Finite difference time domain method (FDTD) Ultra-wideband antenna
CLC: TN25
Type: Master's thesis
Year: 2006
Downloads: 31
Quote: 0
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Abstract


Photoconductive semiconductor switches (PCSS) has extremely good characteristics in high-power ultra-wideband pulse has a very wide range of applications in the fields and ultrafast electronics and many other fields . GaAs photoconductive switch Si photoconductive switch with fast response , high conversion efficiency , the ability of high voltage , especially in addition to the conventional linear model , there is a high- gain nonlinear mode , this mode allows the PCSS conduction of light energy by 3-5 orders of magnitude lower than the conventional model , which provides the possibility of realizing PCSS device miniaturization , practical , integrated . However, so far , still no one model can be well explained by the nonlinear mode of PCSS a serious impediment to the potential of mining . Actual needs light to switch a large number of experiments , hoping to find it's the law : and then simulate a horn antenna near-field electromagnetic properties . The main work of this paper is as follows : (1 ) through the analysis of linear and nonlinear mode of photoconductive switch , summed up their respective characteristics . Experimental study of nonlinear photoconductive switch technology (2) semiconductor laser excitation , the experimental research on semiconductor laser excitation photoconductive switch not been reported in the country . This is conducive to miniaturization , all-solid-state high- power pulse generation system . (3) In the experiment , we found that the accumulation phenomenon of the light generated carriers , and an analysis of the change when the performance degradation of the output pulse when the photoconductive switch . (4 ) FDTD method , horn antenna near-field electromagnetic field radiation characteristics simulated . The above-mentioned study for photoconductive switch technology to practical significance.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Optical waveguide and integrated optics
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