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Scalable and Fast Optical Circuit Switch Based on Colorless Coherent Detection : Design Principle and Experimental Demonstration

We investigate a large-scale and fast optical circuit switch system that uses digital coherent technologies. The achievable port count is expanded by introducing colorless detection which eliminates channel selecting filters at receivers. Wavelength selection is performed using a shared local oscillator (LO) bank, which is configured by combining a multi-wavelength optical source with Silicon-photonic tunable filters (TFs). Microsecond switching times are realized with the thermo-optic effect available with the Silicon-photonic TF. Design optimization of the proposed system handles complex level of freedom, i.e., available wavelength number, space switch port count, optical amplifier location and gain, and device loss. In addition, colorless coherent detection induces penalties, which further complicates switch scale assessment. In this paper, we develop a simulator to clarify how those parameters affect switch performance; the switch throughput is maximized with consideration of the degradation stemming from colorless detection. The design performance accurately matches results measured in various system scenarios. A dual-carrier 256-Gb/s DP-QPSK experiment successfully demonstrates a 1,856 × 1,856 optical switch system with switching time under 3.52 μs. The resulting total throughput is 441 Tb/s assuming 7%-overhead HD-FEC. To the best of our knowledge, this is the first demonstration of 400-Tbps class large bandwidth optical switches that use TFs as wavelength selective devices for coherent detection.

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Informasi Detail

Judul Seri

JOURNAL OF LIGHTWAVE TECHNOLOGY; Vol.39 No.8 April 15 2021

No. Panggil

-

Penerbit

: .,

Deskripsi Fisik

p. 2263 - 2274

Bahasa

English

ISBN/ISSN

-

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

COHERENT DETECTION
SILICON PHOTONICS
TUNABLE FILTER
DATA CENTER NETWORK
ELECTRICAL AND OPTICAL HYBRID SWITCHING
OPTICAL CIRCUIT SWITCH

Info Detail Spesifik

DOI: 10.1109/JLT.2021.3050734

Pernyataan Tanggungjawab

Ryosuke Matsumoto, Takashi Inoue, Ryotaro Konoike, Hiroyuki Matsuura, Keijiro Suzuki, Yojiro Mori, Kazuhiro Ikeda, Shu Namiki, Ken-ichi Sato,

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