High-Speed Digital Coherent Receiver Based on Parallel Optical Sampling

Author

Fischer, Johannes Karl ; Ludwig, Reinhold ; Molle, Lutz ; Schmidt-Langhorst, Carsten ; Leonhardt, Christoph Clemens ; Matiss, Andreas ; Schubert, Colja

Author_Institution

Fraunhofer Inst. for Telecommun., Heinrich Hertz Inst., Berlin, Germany

Volume

29

Issue

4

fYear

2011

Firstpage

378

Lastpage

385

Abstract

We report a novel digital coherent receiver based on sampling the signal in the optical domain to overcome the speed limitations of electrical analog-to-digital converters. Digital coherent receivers with aggregate optical sampling rates of up to 112 GHz are realized experimentally. The performance of such receivers is investigated in transmission experiments. Transmission of 56 GBd quadrature phase-shift keying signals over 610-km standard single-mode fiber and coherent detection with electronic impairment mitigation is demonstrated. The employed electrical analog-to-digital converters have only 20 GHz bandwidth and a sampling rate of 50 GHz.

Keywords

analogue-digital conversion; heterodyne detection; optical fibre communication; optical receivers; electrical analog-to-digital converters; frequency 20 GHz; frequency 50 GHz; high speed digital coherent receiver; parallel optical sampling; Optical fibers; Optical polarization; Optical pulses; Optical receivers; Optical transmitters; Homodyne detection; optical fiber communication; optical receivers; signal sampling;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2010.2090132

Filename

5613129