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arXiv · 2605.25106

Silicon Photonic CWDM Filter with Compact Footprint, Low Loss, Flat-Top Transmission and High Yield

Qingzhong Deng·Alaa Elshazly·Rafal Magdziak·Liesbeth Witters·Swetanshu Bipul·Maumita Chakrabarti·Dimitrios Velenis·Filippo Ferraro·Huseyin Sar·Peter Verheyen·Philippe Absil·Peter Ossieur·Imene Jadli·Joris Van Campenhout
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Abstract

A novel silicon photonic CWDM filter design is proposed and experimentally demonstrated. The design has achieved flat-top transmission across all dies on a wafer, with a device footprint of 48*25 {\mu}m2, an insertion loss of 0.24 $\pm$ 0.18 dB, and a channel central wavelength standard deviation of 0.77 nm.

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Qingzhong Deng, Alaa Elshazly, Rafal Magdziak, Liesbeth Witters, Swetanshu Bipul, Maumita Chakrabarti, Dimitrios Velenis, Filippo Ferraro, Huseyin Sar, Peter Verheyen, Philippe Absil, Peter Ossieur, Imene Jadli, Joris Van Campenhout. 2026-05-24. Silicon Photonic CWDM Filter with Compact Footprint, Low Loss, Flat-Top Transmission and High Yield. https://arxiv.org/abs/2605.25106

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