Synthesis of codirectional couplers with ultralow sidelobes and minimum bandwidth.
Synthesis of codirectional couplers with ultralow sidelobes and minimum bandwidth.
复制标题
具有超低旁瓣和最小带宽的同向耦合器的合成。
DOI:
10.1364/ol.20.001259
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发表时间:
1995
期刊:
影响因子:
3.6
通讯作者:
W. Huang
中科院分区:
文献类型:
--
作者:
B. Little;C. Wu;W. Huang
A general variational optimization procedure is used to synthesize codirectional couplers with arbitrary sidelobe suppression down to -125 dB. Apodization shapes yielding sidelobe levels over the range of -40 dB to -75 dB are given by a single design formula. The limiting performance in terms of sidelobe suppression versus the bandwidth of passive evanescent-type couplers is found.