Výsledky vyhledávání - "OKAMOTO, Seiji"

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Semi-Automatic Line-System Provisioning with Integrated Physical-Parameter-Aware Methodology: Field Verification and Operational Feasibility

We propose methods and an architecture to conduct measurements and optimize newly installed optical fiber line systems semi-automatically using integrated physics-aware technologies in a data center interconnection (DCI) transmission scenario. We dem

Externí odkaz: http://arxiv.org/abs/2403.16281

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Fast WDM provisioning with minimal probing: the first field experiments for DC exchanges

Autor: Nishizawa, Hideki, Mano, Toru, De Lima, Thomas Ferreira, Huang, Yue-Kai, Wang, Zehao, Ishida, Wataru, Kawashima, Masahisa, Ip, Ezra, D'Amico, Andrea, Okamoto, Seiji, Inoue, Takeru, Anazawa, Kazuya, Curri, Vittorio, Zussman, Gil, Kilper, Daniel, Chen, Tingjun, Wang, Ting, Asahi, Koji, Takasugi, Koichi

We propose an approach to estimate the end-to-end GSNR accurately in a short time when a data center interconnect (DCI) network operator receives a service request from users, not by measuring the GSNR at the operational route and wavelength for the

Externí odkaz: http://arxiv.org/abs/2309.07359

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Laser Phase Noise Tolerance of Uniform and Probabilistically-shaped QAM Signals for High Spectral Efficiency Systems

Autor: Sasai, Takeo, Matsushita, Asuka, Nakamura, Masanori, Okamoto, Seiji, Hamaoka, Fukutaro, Kisaka, Yoshiaki

Publikováno v: Journal of Lightwave Technology, Vol. 38, Issue. 2, 2020

We numerically and experimentally investigate the laser phase noise tolerance of probabilistically shaped (PS) and uniformly shaped (US) quadrature amplitude modulation (QAM) signals. In the simulations, we compare PS-64QAM to US-16QAM, PS-256QAM to

Externí odkaz: http://arxiv.org/abs/2012.08078

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Wiener-Hammerstein model and its learning for nonlinear digital pre-distortion of optical transmitters

Autor: Sasai, Takeo, Nakamura, Masanori, Yamazaki, Etsushi, Matsushita, Asuka, Okamoto, Seiji, Horikoshi, Kengo, Kisaka, Yoshiaki

Publikováno v: Optics Express, Vol. 28, Issue. 21, pp. 30952-30963, 2020

We present a simple nonlinear digital pre-distortion (DPD) of optical transmitter components, which consists of concatenated blocks of a finite impulse response (FIR) filter, a memoryless nonlinear function and another FIR filter. The model is a Wien

Externí odkaz: http://arxiv.org/abs/2012.08046

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