An efficient modulation technique for suppressing intrachannel FWM in 40Gb/s optical transmission systems

Hussam G. Batshon, Ivan B Djordjevic, Bane V Vasic

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In high bit-rate retum-to-zero (RZ) on-off keying (OOK) systems operating at 40Gb/s and beyond ghost pulses induced by intrachannel four-wave mixing (IFWM), and intrachannel cross-phase modulation (IXPM) are dominant factors affecting the performance of a high-speed optical transmission system. As the creation of ghost pulses is a phase sensitive effect, the common approach to deal with IFWM is to remove short-term phase coherence by employing a proper modulation format. Another approach, known as constrained or line coding, is to identify the most troublesome sequences and to forbid them during encoding process. This paper presents an efficient method for testing the efficiency of a modulation techniques for countering the effects of IFWM by calculating the sum of all the contributors at a given resonance position. For a modulation technique to counter these effects the initial pulses phases must be chosen properly so that different contributors to the ghost pulse creation cancel each other in bit being in "resonance". In addition to this method, we are proposing a modulation technique that shows a significant Q-factor improvement of up to 7.5dB (depending on the number of spans and the phase sequence implemented) over the uncoded RZ-OOK as will be demonstrated. Finally, implementation of this phase modulation technique is very efficient in extending the non-linearity tolerance and enhancing the performance of a high-speed optical transmission system.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume6388
DOIs
StatePublished - 2006
EventOptical Transmission Systems and Equipment for Networking V - Boston, MA, United States
Duration: Oct 2 2006Oct 4 2006

Other

OtherOptical Transmission Systems and Equipment for Networking V
CountryUnited States
CityBoston, MA
Period10/2/0610/4/06

Fingerprint

Light transmission
Four wave mixing
ghosts
Modulation
four-wave mixing
modulation
keying
Phase modulation
pulses
phase modulation
coding
high speed
phase coherence
format
Q factors
counters
nonlinearity
Testing
Amplitude shift keying

Keywords

  • Constrained coding
  • Intrachannel cross-phase modulation
  • Intrachannel four-wave mixing
  • Low-density parity-check (LDPC) codes
  • Optical communications

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Batshon, H. G., Djordjevic, I. B., & Vasic, B. V. (2006). An efficient modulation technique for suppressing intrachannel FWM in 40Gb/s optical transmission systems. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 6388). [63880H] https://doi.org/10.1117/12.686435

An efficient modulation technique for suppressing intrachannel FWM in 40Gb/s optical transmission systems. / Batshon, Hussam G.; Djordjevic, Ivan B; Vasic, Bane V.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6388 2006. 63880H.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Batshon, HG, Djordjevic, IB & Vasic, BV 2006, An efficient modulation technique for suppressing intrachannel FWM in 40Gb/s optical transmission systems. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 6388, 63880H, Optical Transmission Systems and Equipment for Networking V, Boston, MA, United States, 10/2/06. https://doi.org/10.1117/12.686435
Batshon HG, Djordjevic IB, Vasic BV. An efficient modulation technique for suppressing intrachannel FWM in 40Gb/s optical transmission systems. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6388. 2006. 63880H https://doi.org/10.1117/12.686435
Batshon, Hussam G. ; Djordjevic, Ivan B ; Vasic, Bane V. / An efficient modulation technique for suppressing intrachannel FWM in 40Gb/s optical transmission systems. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6388 2006.
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