Demonstration of InP-InGaAsP vertical grating-assisted codirectional coupler filters and receivers with tapered coupling coefficient distributions
Demonstration of InP-InGaAsP vertical grating-assisted codirectional coupler filters and receivers with tapered coupling coefficient distributions
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DOI：
10.1109/68.593377
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发表时间：
1997-07
影响因子：
2.6
通讯作者：
Yu-Heng Jan;G. Fish;L. Coldren;S. Denbaars
中科院分区：
文献类型：
--
作者：
Yu-Heng Jan;G. Fish;L. Coldren;S. Denbaars
在这封信中，我们展示了第一个垂直光栅辅助的具有锥形耦合系数分布的同向耦合滤波器和接收器。通过调制光栅占空比来实现锥化。通过这样做，观察到了比传统器件更好的旁瓣抑制比(SSR)的滤波响应。将该设计应用于集成接收机中，获得了16d B的信噪比记录。结果表明，在输入耦合良好的情况下，采用该方法的接收机旁瓣电平可以低于/SPL sim/40db。
In this letter, we demonstrate the first vertical grating-assisted codirectional coupler filter and receiver with a tapered coupling coefficient distribution. The tapering is achieved by modulating the grating duty ratio. By doing so, filter responses with sidelobe suppression ratios (SSR) better than conventional devices are observed. Using this design in an integrated receiver, a record SSR of 16 dB is reported. With perfect input coupling, it is found that the receiver sidelobe levels using this approach can be lower than /spl sim/40 dB.