Enhancement of frequency-tenability for a Smith-Purcell free-electron laser oscillator in the millimeter-wave region

被引：0
|
作者：
Shiozawa, T [1 ]
Muya, T
Hirata, A
机构：
[1] Chubu Univ, Dept Elect & Informat Engn, Kasugai, Aichi 4878501, Japan
[2] Osaka Univ, Dept Commun Engn, Suita, Osaka 5650871, Japan
来源：
IEEE TRANSACTIONS ON PLASMA SCIENCE | 2006年 / 34卷 / 03期
关键词：
metallic Bragg reflector; millimeter waves; Smith-Purcell free-electron laser (FEL); tunability;
D O I：
10.1109/TPS.2006.875772
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The frequency-tenability for a Smith-Purcell free-electron laser oscillator in the millimeter wave region is enhanced with the aid of a quasi-periodic distributed Bragg reflector (DBR) made of metallic waveguide gratings with rectangular grooves. For a quasi-periodic DBR, the grating parameters are adjusted by means of genetic algorithms to get the desired reflection coefficient, thus compensating for the frequency dependence of the overall output characteristics. For, a typical numerical example, flat output characteristics have been obtained over 10% bandwidth around the center frequency 121 GHz.
引用
收藏
页码：559 / 562
页数：4
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