Open Access40-Gb/s QPSK and 20-Gb/s PSK with inserted pilot symbols using self-homodyne detection
Author(s) -
Guo-Wei Lu,
Moriya Nakamura,
Yukiyoshi Kamio,
Tetsuya Miyazaki
Publication year - 2007
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.15.007660
Subject(s) - phase shift keying , homodyne detection , direct conversion receiver , physics , keying , transmitter , optics , quadrature amplitude modulation , detector , local oscillator , phase modulation , electronic engineering , phase detector , phase noise , computer science , telecommunications , bit error rate , engineering , decoding methods , channel (broadcasting) , quantum mechanics , voltage
We proposed and experimentally demonstrated 40-Gb/s quadrature phase-shifted keying (QPSK) and 20-Gb/s binary phase-shifted keying (PSK) transmission systems with inserted pilot symbols, using a return-to-zero radio frequency (RZ-RF) driving signal in the transmitter and self-homodyne direct detection in the receiver. Different from other existing homodyne or conventional differential PSK/QPSK systems, the proposed PSK and QPSK modulation formats do not need any complicated pre-coder, post-processor or local oscillator. In the proposed QPSK systems, simultaneous detection of in-phase and quadature components is successfully achieved by using one Mach-Zehnder delay interferometer and following balanced detector, which significantly reduces the system complexity and implementation cost.