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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 29, Iss. 17 — Sep. 1, 2011
  • pp: 2533–2537

Characterization and Monitoring of Laser Linewidths in Coherent Systems

Xi Chen, Abdullah Al Amin, and William Shieh

Journal of Lightwave Technology, Vol. 29, Issue 17, pp. 2533-2537 (2011)


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Abstract

A closed-form expression for differential phase-error variance is derived for the phase noise averaged over a finite time window. Using this expression, a method of laser linewidth characterization and in-service monitoring is proposed in presence of additive white noise applicable to both single-carrier and multi-carrier systems. The method is further substantiated by experiments of 107-Gb/s coherent optical OFDM transmission over 960-km SSMF fiber. Additionally, a novel technique of digitally tuning laser linewidth is proposed and demonstrated which may be useful to systematically study the laser phase noise impact.

© 2011 IEEE

Citation
Xi Chen, Abdullah Al Amin, and William Shieh, "Characterization and Monitoring of Laser Linewidths in Coherent Systems," J. Lightwave Technol. 29, 2533-2537 (2011)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-29-17-2533

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