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Effect of sidelobes on demultiplexing characteristics of a grating-folded directional coupler demultiplexer

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4 Author(s)
Shibata, Y. ; NTT Opto-Electron. Labs., Kanagawa, Japan ; Oku, S. ; Kondo, Y. ; Tamamura, Toshiaki

The effect of sidelobes on the demultiplexing characteristics of a grating-folded directional coupler demultiplexer are investigated. The bit error-rate characteristics of the demultiplexed signal is examined, and a power penalty originated from the sidelobe is observed for the grating-folded directional coupler with conventional uniform grating. A phase-synchronized sampled grating is applied to suppress the sidelobe of a Bragg grating, and power-penalty-free demultiplexing is achieved in this structure.

Published in:

Photonics Technology Letters, IEEE  (Volume:8 ,  Issue: 1 )