IEEE/ICACT20220296 Slide.11        [Big Slide]       [YouTube] Oral Presentation
This is the reflected spectrum of regular periodic multi-layer structure. We see that the bandwidth of the reflected band is very wide. That is ¥Ä¥ë ¡Ã 850 nm. As a result, a large number of filters are required for multiplexing/de-multiplexing a large number of channels.

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