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Updated: May 25, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
Published on: March 20, 2017
Ultrahigh-speed "orthogonal" TDM transmission with an optical Nyquist pulse train
Masataka Nakazawa1, Toshihiko Hirooka, Peng Ruan
1Research Institute of Electrical Communication, Tohoku University, Aoba-ku, Sendai-shi, Japan. nakazawa@riec.tohoku.ac.jp
Abstract:
We propose a novel "orthogonal" TDM transmission scheme using an optical Nyquist pulse that enables us to achieve an ultrahigh data rate and spectral efficiency simultaneously without any intersymbol interference (ISI). We analytically describe the principle of orthogonal TDM, and demonstrate a 160 Gbaud optical orthogonal TDM transmission using 40 GHz optical Nyquist pulses. Tolerance to GVD and the dispersion slope is significantly improved by virtue of the orthogonality, reduced bandwidth, and minimum ISI.
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