First demonstration of C + L band CDCROADM with simple node configuration using multiband switching devices

Shuto Yamamoto; Hiroki Taniguchi; Yoshiaki Kisaka; Stefano Camatel; Yiran Ma; Daisuke Ogawa; Koichi Hadama; Mitsunori Fukutoku; Takashi Goh; Kenya Suzuki

doi:10.1364/oe.433383

arXiv · 2106.02376

First demonstration of C + L band CDCROADM with simple node configuration using multiband switching devices

Shuto Yamamoto·Hiroki Taniguchi·Yoshiaki Kisaka·Stefano Camatel·Yiran Ma·Daisuke Ogawa·Koichi Hadama·Mitsunori Fukutoku·Takashi Goh·Kenya Suzuki

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Abstract

While ultrahigh-baud-rate optical signals are effective for extending the transmission distance of large capacity signals, they also reduce the number of wavelengths that can be arranged in a band because of their wider bandwidth. This reduces the flexibility of optical path configuration in reconfigurable optical add/drop multiplexing (ROADM) networks. In colorless, directionless and contentionless (CDC)-ROADM in particular, the effect reduces the add/drop ratio at a node. Multiband ROADM systems are an effective countermeasure for overcoming this issue, but they make the node configuration more complicated and its operation more difficult. In this paper, we analyze the challenges of C + L band CDC-ROADM and show that optical switch devices that operate over multiple bands are effective in meeting them. For this purpose, we built a C + L band CDC-ROADM node based on C + L band wavelength selective switches (WSSs) and multicast switches (MCSs) and confirmed its effectiveness experimentally. In particular, to simplify the node configuration, we propose a reduction in the number of optical amplifiers used for node loss compensation and experimentally verify its feasibility.

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Shuto Yamamoto, Hiroki Taniguchi, Yoshiaki Kisaka, Stefano Camatel, Yiran Ma, Daisuke Ogawa, Koichi Hadama, Mitsunori Fukutoku, Takashi Goh, Kenya Suzuki. 2021-06-04. First demonstration of C + L band CDCROADM with simple node configuration using multiband switching devices. https://doi.org/10.1364/oe.433383

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