Wave-coupled LiNbO/sub 3/ electrooptic modulator for microwave and millimeter-wave modulation
Wave-coupled LiNbO/sub 3/ electrooptic modulator for microwave and millimeter-wave modulation
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用于微波和毫米波调制的波耦合 LiNbO/sub 3/电光调制器
DOI：
10.1109/68.76865
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发表时间：
1991
影响因子：
2.6
通讯作者：
J. Schaffner
中科院分区：
文献类型：
--
作者：
W. Bridges;F. T. Sheehy;J. Schaffner
提出了一种新的电光调制器相速度匹配技术。结果表明，通过将调制传输线分成短段，并将每段调制传输线连接到各自的表面偶极天线上，可以大大减小行波LiNbO/sub 3/光波导调制器中由于材料色散引起的相速度失配。然后，天线阵列由调制信号以适当的角度从下方照射，以产生与光波导的延迟匹配的天线到天线的延迟。一个相位调制器25毫米长的五个天线和五个传输线段的操作从4.6到13 GHz的最大相位调制灵敏度超过100度/W/sup 1/2/。<<ETX>>
A new technique of phase velocity matching in electrooptic modulators was demonstrated. The results show that the phase velocity mismatch due to material dispersion in traveling-wave LiNbO/sub 3/ optical waveguide modulators can be greatly reduced by breaking the modulation transmission line into short segments and connecting each segment to its own surface dipole antenna. The array of antennas is then illuminated by the modulation signal from below at the proper angle to produce a delay from antenna to antenna that matches the optical waveguide's delay. A phase modulator 25 mm in length with five antennas and five transmission line segments was operated from 4.6 to 13 GHz with a maximum phase modulation sensitivity of over 100 degrees /W/sup 1/2/.<<ETX>>