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We demonstrated the first 400-Gb/s optical super-channel transmission over 7,200km DMF link using 8 optical subcarriers at 35GHz spacing and modulated with 32G baud-rate DP-BPSK Nyquist signal. Spectral efficiency of 1.43b/s/Hz was achieved.
400G superchannel with four parallel 100-GbE subcarriers is successfully transmitted in real-time over 3600-km of DMF link using 150-GHz bandwidth. Optical Nyquist shaping is employed to reduce performance penalty induced by sharp optical filtering.
We experimentally demonstrate a method of distributed matched filtering to satisfy ISI-free criterion for Nyquist OTDM-WDM pass-drop operations over cascaded WSSs. Spectrally packed 4×172Gb/s OTDM-WDM channels are successively dropped by WSSs at BER <; 10-9.
This talk will address the role of ultrafast optical signal processing in the energy efficient all-optical network for future, and reports on key applications such as tunable regenerators with chirp control for various modulation formats.
A coherent mixer with double-pass polarization-beam splitters integrated in silica-based PLC is newly developed. It is experimentally confirmed that the developed PLC-chip successfully works in the receiver for 40-Gbit/s dual-polarization quadrature phase-shift keying signal.
We propose and demonstrate a simple all-optical regeneration scheme for 160 Gbit/s OTDM signal. Retiming and amplitude-limiting functions are simultaneously performed by parametric amplification of a signal with an optical clock synchronized by an OPLL technique.
We developed polarization-maintaining comb-like profiled fiber (CPF) for the first time. Extinction ratio of 20 dB was achieved in a whole length of fabricated 4-step CPF. 10 GHz repeating, 2.4 ps pulse train was successfully compressed to 0.9 ps.
We show how an atom can couple light to a nanobody efficiently. We demonstrate that a significant fraction of emission from the atom can be channeled into guided modes of a nanofiber.
We review our recent results on optical short pulse generation based on "comb-like profiled fiber (CPF)". Various types of CPF are summarized, where we show that the CPF technologies are suitable for truly practical, externally synchronous, and flexible short pulse generation
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