Optimal design of an MMI coupler for broadening the spectral response of an AWG demultiplexer

被引：32

作者：

Dai, DX ^{[1
]}

Liu, SZ

He, SL

Zhou, QC

机构：

[1] Zhejiang Univ, State Key Lab Modern Opt Instrumentat, Ctr Opt & Electromagnet Res, Hangzhou 310027, Peoples R China

[2] Royal Inst Technol, Div Electromagnet Theory, Alfven Lab, S-10044 Stockholm, Sweden

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2002年 / 20卷 / 11期

关键词：

arrayed-waveguide grating (AWG); flattened spectral response; Gaussian approximation; multimode interference; wavelength-division multiplexing (WDM);

D O I：

10.1109/JLT.2002.806330

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Optimal design of a multimode interference (MMI) coupler for broadening the spectral response of an arrayed-waveguide grating (AWG) demultiplexer is considered. By using a Gaussian beam approximation, an analytical expression for the spectral response of an AWG demultiplexer (with an MMI section) is obtained. A simple analytical formula is derived to relate the optimal MMI length to the separation between the peaks of the twofold images in the MMI region. This peak separation is related to the width of the MMI section. In the proposed design method, a required 1-dB passband width determines the peak separation, which then determines the optimal value for the length of the MMI section according to the analytical formula. The designed flat-top AWG demultiplexer is verified by the beam propagation method.

引用

页码：1957 / 1961

页数：5

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