Open AccessSimultaneous detection of 10-Gbit/s QPSK × 2-ch Fourier-encoded synchronous OCDM signals with digital coherent receiver
Author(s) -
Yasuyuki Okamura,
Osamu Ichiyoshi,
Satoru Shimizu,
Naoya Wada,
Masanori Hanawa
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.003298
Subject(s) - phase shift keying , multiplexing , fourier transform , computer science , optics , physics , digital signal processing , channel (broadcasting) , electronic engineering , bit error rate , telecommunications , engineering , quantum mechanics
We experimentally demonstrate the simultaneous detection of 10-Gbit/s quadrature phase shift keying (QPSK) × 2-channel Fourier-encoded synchronous optical code division multiplexing (FE-SOCDM) signals using a digital coherent receiver, for the first time. First, we analytically verify that simultaneous detection can be achieved with an N-point discrete Fourier transform (DFT) using digital signal processing (DSP) because the N-channel Fourier encoding corresponds to an N × N inverse DFT, then the operation is experimentally confirmed. Simultaneous detection of 10-Gbit/s QPSK × 2-channel FE-SOCDM signals is evaluated. The proposed scheme dramatically expands the capability of OCDM systems.