Silicon Based 1 × M Wavelength Selective Switch Using Arrayed Waveguide Gratings With Fold-Back Waveguides

Silicon Based 1 × M Wavelength Selective Switch Using Arrayed Waveguide Gratings With Fold-Back Waveguides
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使用具有折返波导的阵列波导光栅的硅基 1 × M 波长选择开关

DOI:
10.1109/jlt.2020.3048585
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发表时间:
2021
影响因子:
4.7
通讯作者:
Tsuda Hiroyuki
Tsuda Hiroyuki
中科院分区:
工程技术2区
文献类型:
--
作者:
Nakamura Fumi;Asakura Hideaki;Suzuki Keijiro;Tanizawa Ken;Ohtsuka Minoru;Yokoyama Nobuyuki;Matsumaro Kazuyuki;Seki Miyoshi;Ikeda Kazuhiro;Namiki Shu;Kawashima Hitoshi;Tsuda Hiroyuki

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报道了一种新型的1 × M折叠式波长选择开关(WSS)的设计,该开关比传统的集成WSS具有更少的波导交叉。WSS由交织器、1 × M光开关和阵列波导光栅(awg)组成。开关通过折叠式波导与AWG组合,每个AWG同时作为解复用器和复用器,从而避免了由制造误差引起的中心波长不匹配。波导交叉会在光波电路中造成过多的串扰和损耗。通过使用折叠式结构,交叉的数量可以减少到少于传统设计的一半。讨论了折叠式WSS的工作原理、设计方法和可扩展性。此外,还演示了200 ghz间隔、20通道、1 × 2硅WSS在5 mm × 10 mm SOI芯片上的折叠式开关操作。它在一条路径上有15个波导交叉点,其中6个是与监控波导的额外交叉点。平均插入损耗为29.6 dB,平均消光比为10.9 dB。
The design of a novel 1 × M fold-back type wavelength selective switch (WSS), which has fewer waveguide crossings than a conventional integrated WSS, is reported. The WSS is composed of interleavers, 1 × M optical switches, and arrayed waveguide gratings (AWGs). Switches are combined with AWGs by fold-back waveguides, and each AWG works as both a demultiplexer and multiplexer thus avoiding center wavelength mismatch caused by fabrication errors. Waveguide crossings cause excess crosstalk and loss in lightwave circuits. By using a fold-back architecture the number of crossings can be reduced to less than half that of a conventional design. We discuss the operating principle, the design method, and the scalability of the fold-back type WSS. Furthermore, the switching operation of a 200-GHz spacing, 20-channel, 1 × 2 silicon WSS in a fold-back configuration on a 5 mm × 10 mm SOI chip is demonstrated. This has 15 waveguide crossings in a path, of which six are additional crossings with monitor waveguides. The average insertion loss and average extinction ratio are 29.6 dB and 10.9 dB, respectively.
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