Mode-conversion enhancement of guided optical waves by magnetostatic surface waves propagating collinearly in obliquely magnetized bismuth-doped yttrium-iron-garnet film waveguide

被引：0
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作者：
Wu, Bao-Jian [1 ]
Wen, Feng [1 ]
Qiu, Kun [1 ]
机构：
[1] Key Lab. of Broadband Optical Fiber Transmission and Communication Networks, Ministry of Education, University of Electronic Science and Technology of China, Chengdu 610054, China
来源：
Journal of Applied Physics | 2006年 / 100卷 / 12期
关键词：
The dispersion formula and dynamic magnetization for magnetostatic surface waves (MSSWs) under arbitrarily inclined bias magnetic field and the mode-conversion effect of guided optical waves (GOWs) by the MSSWs propagating collinearly in obliquely magnetized bismuth-doped yttrium-iron-garnet film waveguide are studied theoretically. It is shown by our calculation that: (1) by optimizing the direction of bias magnetic field; the mode-conversion efficiency (MCE) of the GOWs can be increased by about 7.3 dB compared with that at the conventional magnetization; (2) at in-plane magnetization; the coupling interaction between the incident light and the frequency-shifted and mode-converted light is so strong that the others can be neglected; and thus the analysis on the GOW mode-conversion with the MSSWs in the case can be simplified further; and (3) under the optimum condition; the linearly dynamic dependence of the mode-conversion and diffraction efficiency on the microwave current is up to 25 dB or so; and the first peak value is 62.7%. © 2006 American Institute of Physics;
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