90Gbaud NRZ-DP-DQPSK Modulation with Full-ETDM Technique Using High-Speed Optical IQ Modulator

Atsushi KANNO; Takahide SAKAMOTO; Akito CHIBA; Masaaki SUDO; Kaoru HIGUMA; Junichiro ICHIKAWA; Tetsuya KAWANISHI

doi:10.1587/transele.E94.C.1179

Joint Special Section on Opto-electronics and Communications for Future Optical Network

90Gbaud NRZ-DP-DQPSK Modulation with Full-ETDM Technique Using High-Speed Optical IQ Modulator

Atsushi KANNO, Takahide SAKAMOTO, Akito CHIBA, Masaaki SUDO, Kaoru HIGUMA, Junichiro ICHIKAWA, Tetsuya KAWANISHI

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Keywords: Ti:LiNbO₃ optical modulator, optical IQ modulator, quadrature phase shift keying, electrically time-division multiplexing

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2011 Volume E94.C Issue 7 Pages 1179-1186

DOI https://doi.org/10.1587/transele.E94.C.1179

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Abstract

We demonstrate high baud-rate DQPSK modulation with full-ETDM technique using a novel high-speed optical IQ modulator consisting of a ridge-type optical waveguide structure on a thin LiNbO₃ substrate. Our fabrication technique achieves a drastic extension of the modulator's bandwidth and a reduction of half-wave voltage. Demonstration of 90-Gbaud NRZ-DP-DQPSK signal generation with the modulator successfully achieved a bit rate of 360-Gb/s under full-ETDM configuration.

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