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Assessment and mitigation of EDFA gain transients in hybrid WDM/TDM PON in the presence of packet based traffic

Neto, B. ; Reis, C. ; Dionísio, R.P. ; Ferreira, J. ; Lázaro, J. ; Tosi-Beleffi, G. ; Pinto, A. N. ; Nogueira, R.N. ; Teixeira, A. ; André, P.S

IET Optoelectronics Vol. 4, Nº 6, pp. 219 - 225, June, 2010.

ISSN (print): 1751-8768
ISSN (online): 1751-8768

Journal Impact Factor: 0,588 (in 2008)

Digital Object Identifier: 10.1049/iet-opt.2009.0065

Abstract
In this paper we present an innovative gain clamping method to mitigate Erbium-doped Fiber Amplifiers transients under bursty or packetized traffic. This method is based on a lasing technique by means of a CW feedback signal reflected on a Fiber Bragg Grating. The clamping was assessed using on a range of re-injected powers from -30 dBm to -5 dBm and able to fully mitigate the packet transients. The performance of the system at 2.5 Gb/s and 10.0 Gb/s was appraised for different inter-packets times being observed in all cases an improvement in the Q factor. Additionally, a study that includes a characterization of the transients (gain excursion and decaying time) with the inter-packet parameters and a comparison with theory was also presented.