title: High-performance TDM demultiplexing of coherent Nyquist pulses using time-domain orthogonality.
abstract: We propose a simple and high-performance scheme for demultiplexing coherent Nyquist TDM signals by photo-mixing on a photo-detector with Nyquist LO pulses. This scheme takes advantage of the time-domain orthogonality of Nyquist pulses, which enables high-SNR demultiplexing and homodyne detection simultaneously in spite of a strong overlap with adjacent pulses in the time domain. The feasibility of this scheme is demonstrated through a demultiplexing experiment employing 80 Gbaud, 64 QAM Nyquist pulse OTDM signals. This scheme exhibits excellent demultiplexing performance with a much simpler configuration than a conventional ultrafast all-optical sampling scheme.
authors.forename: Koudai
authors.initials: K
authors.lastname: Harako
authors.forename: David Odeke
authors.initials: DO
authors.lastname: Otuya
authors.forename: Keisuke
authors.initials: K
authors.lastname: Kasai
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Hirooka
authors.forename: Masataka
authors.initials: M
authors.lastname: Nakazawa
mesh_terms: D055620:Optical Phenomena; D012815:Signal Processing, Computer-Assisted; D059629:Signal-To-Noise Ratio; D013997:Time Factors