Title :
Linewidth-tolerant QPSK homodyne transmission using a polarization-multiplexed pilot carrier
Author :
Miyazaki, Tetsuya
Author_Institution :
Nat. Inst. of Inf. & Commun. Technol., Tokyo, Japan
Abstract :
Quadrature phase-shift keying homodyne transmission has been demonstrated using a polarization-multiplexed pilot carrier generated in a transmitter and a LiNbO3-based hybrid module in a receiver for self-homodyne detection at 20 Gb/s. No degradation in receiver sensitivity was observed up to a linewidth of 30 MHz. Furthermore, we obtained error-free operation with a bit-error rate of less than 10-11. The proposed scheme can provide stable real-time multilevel modulation/demodulation formats, free from linewidth requirements, to enhance spectral efficiency.
Keywords :
demodulation; error statistics; homodyne detection; lithium compounds; optical fibre communication; optical modulation; optical receivers; optical transmitters; quadrature phase shift keying; 20 Gbit/s; 30 MHz; LiNbO3; LiNbO3-based hybrid module; QPSK homodyne transmission; bit-error rate; modulation/demodulation formats; polarization-multiplexed pilot carrier; quadrature phase-shift keying; receiver; self-homodyne detection; spectral efficiency; transmitter; Bit error rate; Degradation; Demodulation; Error-free operation; Hybrid power systems; Phase detection; Phase shift keying; Polarization; Quadrature phase shift keying; Transmitters; Demodulation; homodyne detection; phase modulation;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.862363
