Hitless Rate Switching for Dynamically Reconfigurable Optical Systems

Author

Rozental, Valery N. ; Mello, Darli A. A.

Author_Institution

Dept. of Electr. Eng., Univ. of Brasilia (UnB), Brasilia, Brazil

Volume

7

Issue

2

fYear

2015

fDate

Apr-15

Firstpage

1

Lastpage

9

Abstract

We propose a set of techniques to enable hitless rate switching for reconfigurable optical systems and validate, by computer simulations, their applicability to NRZ, RZ, and Nyquist pulse shapes. The polarization-multiplexed quadrature phase-shift keying (PM-QPSK) and 16 quadrature amplitude modulation (16QAM) modulation formats are investigated. Error transients that appear during lower-to-higher rate switching are avoided by sufficiently long equalizer training periods. The robustness of the proposed scheme to polarization mode dispersion (PMD) and signal phase noise is also demonstrated.

Keywords

optical noise; optical switches; quadrature amplitude modulation; quadrature phase shift keying; NRZ pulse shapes; Nyquist pulse shapes; RZ pulse shapes; computer simulations; dynamically reconfigurable optical systems; error transients; hitless rate switching; long equalizer training periods; polarization mode dispersion; polarization-multiplexed quadrature phase-shift keying; quadrature amplitude modulation formats; signal phase noise; Adaptive optics; Equalizers; Optical pulse shaping; Optical signal processing; Optical switches; Optical transmitters; Adaptive transponders; Coherent optical communications; Power-efficient transmission; adaptive transponders; power-efficient transmission;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2015.2419226

Filename

7078864