In this Letter, we present a new hybrid broadband-crossbar switching network that can switch multiple wavelengths on demand and can also multicast. This switch fabric is an improvement over our previous design in both switch footprint and power consumption, as it reduces the number of switching elements by approximately 50%. We compare the switch loss and crosstalk with that of a multiwavelength selective crossbar switch. We also comment on fabrication tolerance of second-order ring resonators based on experimental results of 64 second-order ring resonators, and more than 250 heaters.

中文翻译：

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可扩展的组播混合宽带交叉开关波长选择开关：建议和分析

在这封信中，我们提出了一种新的混合宽带交叉开关混合网络，该网络可以按需切换多个波长，并且还可以组播。这种交换结构在交换占位面积和功耗方面都比我们以前的设计有所改进，因为它将交换元件的数量减少了约50％。我们将开关损耗和串扰与多波长选择性交叉开关的损耗进行比较。我们还基于64个二阶环形谐振器和250多个加热器的实验结果对二阶环形谐振器的制造公差进行了评论。