Compact all-optical clock and data recovery for variable length asynchronous data packets based on integrated MZI switches P. Bakopoulos, D. Tsiokos, O. Zouraraki, H. Avramopoulos National Technical University of Athens – Photonics Communications Research Laboratory 9 Iroon Polytechniou Street, Zografou 15773 – Athens, Greece Tel. +30-210-7722057, Fax +30-210-7722077 pbakop@mail.ntua.gr G. Maxwell and A. Poustie Centre for Integrated Photonics, Adastral Park, Ipswich, IP5 3RE, UK Abstract: We present and evaluate a compact, all-optical Clock and Data Recovery (CDR) circuit based on integrated Mach Zehnder interferometric switches. Successful operation for short packet-mode traffic of variable length and phase alignment is demonstrated. The acquired clock signal rises within 2 bits and decays within 15 bits, irrespective of packet length and phase. Error-free operation is demonstrated at 10 Gb/s. ©2005 Optical Society of America OCIS codes: (060.4510) Optical communications; (230.1150) All-optical devices; (250.5980) Semiconductor Optical Amplifiers; (050.2230) Fabry-Perot. References and links 1. S. Nakamura, Y. Ueno and K. Tajima, “Ultrahigh-speed optical signal processing with symmetric-Mach- Zehnder-type all-optical switches”, in Proceedings of IEEE/LEOS Summer Topicals (Institute of Electrical and Electronics Engineers, New York, 2002). 2. http://mufins.cti.gr/ 3. E. Kehayas, G. T. Kanellos, L. Stampoulidis, D. Tsiokos, N. Pleros, G. Guekos and H. Avramopoulos, “Packet-Format and Network-Traffic Transparent Optical Signal Processing”, IEEE J. Lightwave Technol., 22, 2548-2556, ( 2004). 4. R. Clavero, F. Ramos, J. M. Martinez and J. Marti, “All-Optical Flip-Flop Based on a single SOA-MZI”, IEEE Photon. Technol. Lett. 17, 843-845, (2005). 5. D. J. Blumenthal, B. E. Olsson, G. Rossi, T. E. Dimmick, L. Rau, M. Mašanović, O. Lavrova, R. Doshi, O. Jerphagnon, J. E. Bowers, V. Kaman, L. A. Coldren and J. Barton, “All-Optical Label Swapping Networks and Technologies”, IEEE J. Lightwave Technol., 18, 2058-2075, (2000). 6. J. Slovak ,C. Bornholdt, and B. Sartorius, “All-Optical 3R Regenerator for Asynchronous Data Packets at 40 Gbit/s”, in proceedings of European. Conference on Optical Communications, 2004, We.2.5.7, 388-389. 7. G. T. Kanellos, L. Stampoulidis, N. Pleros, T. Houbavlis D. Tsiokos, E. Kehayas H. Avramopoulos and G. Guekos, “Clock and Data Recovery Circuit for 10 Gb/s Asynchronous Optical Packets”, IEEE Photon. Technol. Lett., 15, 1666-1668, (2003). 8. R. Webb, G. Maxwell, B. Manning, “Very low coupling loss, hybrid integrated all-optical regenerator with passive assembly”, in Proceedings of European Conference on Optical Communication 2002, PD3.5. 9. E. Kehayas, L. Stampoulidis, H. Avramopoulos, Y. Liu, E. Tangdiongga, and H. J. S. Dorren, “40 Gb/s all- optical packet clock recovery with ultrafast lock-in time and low inter-packet guardbands”, Opt. Express, 13, 475-480, (2005) http://www.opticsexpress.org/abstract.cfm?URI=OPEX-13-2-475 . 10. C. K. Yow, Y. J. Chai, D. Reading-Picopoulos, R. V. Penty, I. H. White, C. G. Leburn, A. McWilliam, A. A. Lagatsky, C. T. A. Brown, W. Sibbett, G. Maxwell and R. McDougall, “Experimental demonstration of femtosecond switching of a fully-packaged all-optical switch”, Optical Fiber Communication (Optical Society of America, Washington, D.C., 2005), paper OThE4. 11. C. Bintjas, K. Yiannopoulos, N. Pleros, G. Theophilopoulos, M. Kalyvas, H. Avramopoulos and G. Guekos, “Clock Recovery Circuit for Optical Packets”, IEEE Photon. Technol. Lett., 14, 1363-1365, (2002). 12. http://www.ist-lasagne.org/