Quasi-hitless defragmentation technique in elastic optical networks by a coherent RX LO with fast TX wavelength tracking

This paper proposes a technique to realize quasi-hitless defragmentation in elastic optical networks. The technique exploits fast tunable lasers in the transponders and a rapid TX wavelength tracking scheme at the RX based on an athermal AWG and a PD-array. The propose scheme can potentially achieve defragmentation operation with a service disruption time below 400ns.

[1]  P. Castoldi,et al.  Push-pull technique for defragmentation in flexible optical networks , 2012, OFC/NFOEC.

[2]  Masahiko Jinno,et al.  Disruption minimized spectrum defragmentation in elastic optical path networks that adopt distance adaptive modulation , 2011, 2011 37th European Conference and Exhibition on Optical Communication.

[3]  Seb J. Savory,et al.  Burst mode receiver for 112 Gb/s DP-QPSK , 2011, 2011 37th European Conference and Exhibition on Optical Communication.

[4]  Masahiko Jinno,et al.  Spectrum-efficient and scalable elastic optical path network: architecture, benefits, and enabling technologies , 2009, IEEE Communications Magazine.

[5]  S. J. B. Yoo,et al.  Dynamic on-demand lightpath provisioning using spectral defragmentation in flexible bandwidth networks , 2011, 2011 37th European Conference and Exhibition on Optical Communication.

[6]  L.A. Coldren,et al.  Tunable semiconductor lasers: a tutorial , 2004, Journal of Lightwave Technology.