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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 24 — Nov. 19, 2012
  • pp: 26958–26968

Rapid and complete hitless defragmentation method using a coherent RX LO with fast wavelength tracking in elastic optical networks

Roberto Proietti, Chuan Qin, Binbin Guan, Yawei Yin, Ryan P. Scott, Runxiang Yu, and S. J. B. Yoo  »View Author Affiliations

Optics Express, Vol. 20, Issue 24, pp. 26958-26968 (2012)

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This paper demonstrates a rapid and full hitless defragmentation method in elastic optical networks exploiting a new technique for fast wavelength tracking in coherent receivers. This technique can be applied to a single-carrier connection or each of the subcarriers forming a super-channel. A proof-of-concept demonstration shows hitless defragmentation of a 10 Gb/s QPSK single-carrier connection from 1547.75 nm to 1550.1 nm in less than 1 µs. This was obtained using a small (0.625 kB) link-layer transmitter buffer without the need for any additional transponder. We also demonstrated that the proposed defragmentation technique is capable of hopping over an existing connection, i.e. 10 Gb/s OOK at 1548.5 nm, without causing any degradation of its real-time Bit Error Rate (BER) value. The proposed scheme gives advantages in terms of overall network blocking probability reduction up to a factor of 40.

© 2012 OSA

OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(060.4256) Fiber optics and optical communications : Networks, network optimization
(060.4265) Fiber optics and optical communications : Networks, wavelength routing

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: September 21, 2012
Revised Manuscript: November 6, 2012
Manuscript Accepted: November 6, 2012
Published: November 15, 2012

Roberto Proietti, Chuan Qin, Binbin Guan, Yawei Yin, Ryan P. Scott, Runxiang Yu, and S. J. B. Yoo, "Rapid and complete hitless defragmentation method using a coherent RX LO with fast wavelength tracking in elastic optical networks," Opt. Express 20, 26958-26968 (2012)

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