Enhanced optical gain clamping for upstream packet based traffic on hybrid WDM/TDM-PON using Fiber Bragg grating

In this paper, we propose a method to mitigate the temporal power transients arising from Erbium doped fiber amplifiers (EDFAs) on packeted/bursty scenario. The technique, applicable on hybrid WDM/TDMPON for extended reach, is based on a low power clamping provided by a distributed feedback (DFB) laser and a fiber Bragg grating (FBG). An improvement in the data signal Q factor was achieved keeping the clamping control signal with a low power, accompanied by a maximum reduction in the gain excursion of 1.12 dB. ©2010 Optical Society of America OCIS codes: (060.4259) Networks, packet-switched, (060.2320) Fiber optics amplifiers and oscillators, (060.2410) Fibers, erbium. References and links 1. K. Ennser, M. Zannin, S. Taccheo, “Extending Reach of Passive Optical Networks through Optical Amplification”, in International Conference on Transparent Optical Networks, ICTON 2009, Azores, paper Tu.D5.1, 2009. 2. J. A. Lázaro, J. Prat, P. Chanclou, G. M. Tosi Beleffi, A. Teixeira, I. Tomkos, R. Soila, and V. Koratzinos, "Scalable Extended Reach PON," in Optical Fiber Communication Conference and Exposition and The National Fiber Optic Engineers Conference, OFC/NFOEC 2008, paper OThL2. 3. Y. Fukada, K. Suzuki, H. Nakamura, N. Yoshimoto, M. Tsubokawa, “First demonstration of fast automatic gain control (AGC) PDFA for amplyfyng burst-mode PON upstream signal”, European Conference on Optical Communication, ECOC 2008, paper We.2.F.4. 4. Y. Sun, G. Luo, J. L. Zyskind, A. A. M. Saleh, A. K. Srivastava, J. W. Sulhoff, “Model for gain dynamics in Erbium-doped fibre amplifiers”, IEE Electron Lett 32, (1996) 1490-1491. 5. Yoshinari Awaji, Hideaki Furukawa, Naoya Wada, Peter Chan, Ray Man, “Mitigation of the transient response of Erbium doped fiber amplifiers for burst traffic high speed optical packets”, in Conference on Lasers and Electro-Optics, CLEO 2007, paper JTuA133. 6. Yoshinari Awaji, Hideaki Furukawa, Nayoa Wada, Eddie Kong, Peter Chan, Ray Man, “Guidelines for amplification of optical packets in WDM environment regarding impact of transient response of Erbiumdoped fiber amplifier”, Computer Networks 52 (2008) 2087-2093. 7. Y. Liu, C. W. Chow*, C. H. Kwok, H. K. Tsang and Chinlon Lin,“Optical Burst and Transient Equalizer for 10Gb/s Amplified WDM-PON, in Optical Fiber Communication Conference and Exposition and The National Fiber Optic Engineers Conference, OFC/NFOEC 2008, paper OthU7. 8. G. Sacchi, S. Sugliani, A. Bogoni, F. Di Pasquale, R. Di Muro, R. Magri, G. Bruno, F. Cavaliere, “Design and experimental characterization of EDFA-based WDM ring networks with free ASE light recirculation and link control for network survivability”, J. Ligthwave Technol 23, (2005), 1170 – 1181. 9. A.V. Tran; Chang-Joon Chae; R.S. Tucker; Yang Jing Wen, “EDFA transient control based on envelope detection for optical burst switched networks”, Photon Technol Lett 17, (2005) 226 – 228. 10. Alberto Bononi and Leslie A. Rusch, "Doped-Fiber Amplifier Dynamics: A System Perspective," J. Lightwave Technol. 16, 945(1998). 11. B. Neto, C. Reis, R. P. Dionísio, J. M. Ferreira, J. A. Lazaro, G. Tosi-Beleffi, A. N. Pinto, R. Nogueira, A. Teixeira, J. Prat, P. S. André, “Assessment and mitigation of EDFA gain transients in hybrid WDM/TDM PON in the presence of packet based traffic”, Special issue on Next Generation Optical Access, IET Journal of Optoelectronics (to be published in mid 2010).