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Updated: May 25, 2026

Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
Experimental demonstration of multi-degree colorless, directionless, contentionless ROADM for 127-Gbit/s PDM-QPSK
Yohei Sakamaki1, Takeshi Kawai, Tetsuro Komukai
1NTT Network Innovation Laboratories, NTT Corporation, 1-1, Hikarinooka, Yokosuka, Kanagawa, 239-0874 Japan. sakamaki.youhei@lab.ntt.co.jp
Abstract:
We experimentally demonstrate the feasibility of a multi-degree colorless, directionless, and contentionless (C/D/C-less) ROADM node composed of high port count wavelength-selective switches and transponder aggregators using silica-based planar lightwave circuit technology. The experimental results show that the introduction of a C/D/C-less function to a multi-degree ROADM node induces no significant penalty in a 127-Gbit/s PDM-QPSK signal transmission.
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