Microwave characterization of lithium niobate electrooptic modulators with traveling wave electrodes

被引：0
|
作者：
Alam, M. Shah [1 ]
Hassan, M. Khaled [2 ]
Ali, M. Sakawat [1 ]
机构：
[1] Bangladesh Univ Engn & Technol, Dept Elect & Elect Engn, Dhaka 1000, Bangladesh
[2] Presidency Univ, Dept Elect & Comp Engn, Dhaka, Bangladesh
来源：
2008 INTERNATIONAL CONFERENCE ON COMPUTER AND COMMUNICATION ENGINEERING, VOLS 1-3 | 2008年
关键词：
D O I：
10.1109/ICCCE.2008.4580580
中图分类号：
TP301 [理论、方法];
学科分类号：
081202 ;
摘要：
The analysis of traveling-wave electrooptic modulator on z-cut and x-cut lithium-niobate substrates is carried out using the finite element method based on a quasi-TEM approximation. The microwave effective index, characteristic impedance, and frequency dependent attenuations are calculated. Optical frequency response is also calculated and hence the bandwidth is estimated for velocity matching and impedance matching conditions. Bandwidth increases significantly for simultaneous velocity and impedance matching but is limited by the microwave losses in the dielectric material. Optical 3-dB bandwidth of more than 140 GHz can be achieved with X-cut LiNbO3 substrate, when two slots are incorporated in the structure.
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页码：118 / +
页数：2
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