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Journals and Conferences
This paper describes coherent optical orthogonal frequency division multiplexing (CO-OFDM) techniques for the long-haul transmission of 100-Gb/s-class channels. First, we discuss the configurations… (More)
A field trial of 100-Gbit/s Ethernet over an optical transport network (OTN) is conducted using a real-time digital coherent signal processor. Error free operation with the Q-margin of 3.2 dB is… (More)
By employing 111Gb/s no-guard-interval coherent OFDM and SNR maximized second-order distributed Raman amplification in the extended L-band, we demonstrate the record capacity-distance product of… (More)
We demonstrate 240-Gb/s 64-QAM signal modulation and detection. 20-Gbaud 64-QAM signals are generated employing hybrid integration of silica PLCs and LiNbO3 phase modulators, and demodulated with a… (More)
We review technology advancement in our three generations of coherent DSP implemented with 40, 20, and 16-nm CMOS technologies. The latest 16-nm implementation achieves sub-10-watt per 100 Gb/s… (More)
We demonstrate the record capacity-distance product of 48.2 Petabit/s.km by using 111-Gb/s no-guard-interval coherent OFDM with 2-b/s/Hz spectral efficiency.
This paper proposes 100-Gbit/s optical-OFDM transmission using the ODB format. An OFDM signal generated using a simple multi-carrier generator and multi-carrier modulator is successfully transmitted… (More)
We overview the requirements and the enabling technologies for optical transmission systems up to 100 Gb/s and beyond. Polarization- division multiplexed quadrature phase shift keying with digital… (More)
We succeed in the long-haul (1,280km) transmission of a 120-Gb/s PDM 64-QAM signal. The transmission distance was extended from 800 km to 1,280 km by a multi-stage nonlinear compensation technique… (More)
We demonstrate congestion controlled optical burst switching utilizing two-way signaling in field trials. The optical bursts, created in each node with Poisson probability, were routed within 20 ms.