Fast Adaptive Polarization and PDL Tracking in a Real-Time FPGA-Based Coherent PolDM-QPSK Receiver

Fast polarization changes of 40 krad/s and 6-dB polarization-dependent loss (PDL) are tracked in a 2.8-Gb/s real-time coherent quadrature phase-shift keying receiver. The tolerance against fast polarization changes and PDL is measured for different polarization control time constants. The sensitivit...

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Published inIEEE photonics technology letters Vol. 20; no. 21; pp. 1796 - 1798
Main Authors El-Darawy, M., Pfau, T., Hoffmann, S., Peveling, R., Wordehoff, C., Koch, B., Porrmann, M., Adamczyk, O., Noe, R.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.11.2008
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Bit error rate
Coherence
Heterodyning
High speed optical techniques
Noise levels
Optical attenuators
Optical fiber polarization
Optical filters
optical polarization
Optical receivers
Optical transmitters
Page description languages
Phase shift keying
Polarization
Quadrature phase shift keying
quadrature phase-shift keying (QPSK)
Quadratures
Real time
Receivers
synchronous detection
Tolerances
Tracking
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Summary:Fast polarization changes of 40 krad/s and 6-dB polarization-dependent loss (PDL) are tracked in a 2.8-Gb/s real-time coherent quadrature phase-shift keying receiver. The tolerance against fast polarization changes and PDL is measured for different polarization control time constants. The sensitivity penalty of the receiver at a polarization change speed of 40 krad/s is 0.7 dB at bit-error rate (BER) of 1times 10 -3 , with a BER floor of 6.1times10 -7 . With an additional PDL of 6 dB, these figures become 1.7 dB and 9.6 times 10 -6 , respectively.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2008.2004685