PLL-free synchronous QPSK polarization multiplex/diversity receiver concept with digital I&Q baseband processing

Author

Noé, R.

Author_Institution

Univ. Paderborn, Germany

Volume

17

Issue

4

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

887

Lastpage

889

Abstract

This synchronous quadrature-phase-shift keying (QPSK) receiver concept allows us to process signals in parallel after electronic demultiplexing. An automatic electronic polarization control with a control time constant in the low microsecond range is provided. It is followed by a phase-locked loop free carrier recovery. An intermediate frequency linewidth tolerance of up to 10^-3 times the QPSK symbol rate is expected. Commercially available distributed feedback lasers shall, therefore, suffice.

Keywords

demultiplexing; multiplexing; optical fibre communication; optical modulation; optical phase locked loops; optical receivers; quadrature phase shift keying; synchronisation; I & Q baseband processing; control time constant; diversity receiver; electronic demultiplexing; frequency linewidth tolerance; in-phase and quadrature; parallel signal processing; phase-locked loop free carrier recovery; polarization multiplex; quadrature-phase-shift keying; synchronous QPSK; Automatic control; Baseband; Demultiplexing; Distributed feedback devices; Frequency; Laser feedback; Phase locked loops; Polarization; Quadrature phase shift keying; Signal processing; Homodyne detection; optical fiber communication; phase-shift keying; quadrature-phase-shift keying (QPSK); synchronous detection;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2004.842795

Filename

1411910