Research and design of quasi-optical mode converter

Liu Jianwei; Zhao Qing

doi:10.3788/HPLPB20132510.2663

Volume 25 Issue 10

Sep. 2013

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Article Navigation > High Power Laser and Particle Beams > 2013 > 25(10): 2663-2666

Liu Jianwei, Zhao Qing. Research and design of quasi-optical mode converter[J]. High Power Laser and Particle Beams, 2013, 25: 2663-2666. doi: 10.3788/HPLPB20132510.2663

Citation:

Liu Jianwei, Zhao Qing. Research and design of quasi-optical mode converter[J]. High Power Laser and Particle Beams, 2013, 25: 2663-2666. doi: 10.3788/HPLPB20132510.2663

Liu Jianwei, Zhao Qing. Research and design of quasi-optical mode converter[J]. High Power Laser and Particle Beams, 2013, 25: 2663-2666. doi: 10.3788/HPLPB20132510.2663

Citation:

Liu Jianwei, Zhao Qing. Research and design of quasi-optical mode converter[J]. High Power Laser and Particle Beams, 2013, 25: 2663-2666. doi: 10.3788/HPLPB20132510.2663

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Research and design of quasi-optical mode converter

doi: 10.3788/HPLPB20132510.2663

Liu Jianwei^,,
Zhao Qing

1.
Institute of High Energy Electronics,School of Physical Electronics,University of Electronic Science and Technology of China,Chengdu 610054,China

Received Date: 2013-04-16
Rev Recd Date: 2013-07-02
Publish Date: 2013-09-22

Abstract

Abstract

This paper presents a quasi-optical mode converter which can convert the output mode of gyrotrons and other high-power microwave oscillators into quasi-Gaussian beam, aiming to achieve transverse output of quasi-Gaussian beam TEM00 mode. First, we analyze mode propagation in the waveguide and the working mechanism of the Vlasov launcher. Then the radiation fields are calculated using vector diffraction theory. At last a quasi-optical mode converter is designed to convert the 94 GHz, TE62 mode millimeter wave into quasi-Gaussian beam with programming method. The results prove that quasi-Gaussian mode can be obtained at the output window with a simple Vlasov launcher and two mirrors, and the power transmission efficiency of the quasi-optical mode converter reaches to 87.5%.
- gyrotron,
- vector diffraction theory,
- Vlasov launcher,
- quasi-optical mode converter

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