2. A.Tzanakaki, I.Zacharopoulos, D.Parcharidou, I.Tomkos, “Performance Optimization using Advanced Modulation Formats in WDM Metropolitan Area Networks”, Invited paper, ICTON conference, Poland, 2004.
3. A.Tzanakaki, I.Zacharopoulos, I.Tomkos, “Near and Longer Term Architectural Designs for OXCs/OADMs/Network Topologies”, Invited talk, Photonics in Switching 2003, Paris, France
4. I.Zacharopoulos, A.Tzanakaki, D.Parcharidou and I.Tomkos, “Improved Filter Concatenation Tolerance Using Duobinary Modulation Format for Metropolitan Area Networks”, IEEE-LEOS 16th Annual Meeting, Tucson, Arizona 2003, paper WY2, Vol.2, p. 680-1
5. A.Tzanakaki, I.Zacharopoulos and I.Tomkos, “Optical Add/Drop Multiplexers and Optical Cross-Connects for Wavelength Routed Networks”, Invited paper, ICTON conference, Warsaw, Poland, 2003.
6. M.Karagiozidis, I.Zacharopoulos, D.Xenakis, A.M.Demiris, et.al. "Location Aware Visually Enhanced Ubiquitous Services", IST Mobile & Wireless Telecommunications Summit 2002, Thessaloniki, 16-19 June 2002
7. P.Demestichas, K.Kontovasilis, S.Bulzore, R.Menolascino, O.Negru, V.Demesticha, I.Zacharopoulos, "Validation of the Composite Radio Environment Concept by means of experiments", IST Mobile & Wireless Telecommunications Summit 2002, Thessaloniki, 16-19 June 2002
8. I.Zacharopoulos, "User perspective for the future Location services", Mobile Venue 2002, Radio Network Management and Mobile Location Workshop, Athens 30-31 May 2002
9. I.Zacharopoulos, I.Tomkos, D.Syvridis, “Optimization of dispersion shifted fiber phase conjugator including zero dispersion wavelength variation and polarization mode dispersion” (full article), Photonics West’99 SPIE International Conference, San Jose, U.S.A.
10. I.Zacharopoulos, I.Tomkos, D.Syvridis, “Comparison of midspan and multipoint spectral inversion in high bit-rate optical links” (full article), Photonics West’00 SPIE International Conference, San Jose, U.S.A.
11. I.Zacharopoulos, I.Tomkos, D.Syvridis, “Influence of fiber nonlinearities in the performance of an all-optical fiber based demultiplexer” (full article), Photonics West’00 SPIE International Conference, San Jose, U.S.A.
12. I.Tomkos, R.Calvani, I.Zacharopoulos, D.Syvridis, F.Cisternino, E.Riccardi, “All Optical Demultiplexing of 40Gb/s OTDM signal with simultaneous wavelength shift of 19nm”, IEEE-LEOS’99 Annual Meeting, 8-11 November, San Francisco, California, U.S.A.
13. I.Tomkos, I.Zacharopoulos, E.Roditi, D.Syvridis, F.Girardin, L.Occhi, A.Uscov, “Highly performing wavelength converter based on dual pump wave mixing in semiconductor optical amplifiers“, IEEE-LEOS’98 Annual Meeting, 1-4 December, Orlando, Florida, U.S.A (awarded as the “IEEE/LEOS’98 Best Student Paper”).
14. I.Tomkos, I.Zacharopoulos, E.Roditi, D.Syvridis, “Experimental investigation of four wave mixing in a 3-electrode distributed feedback laser”, accepted for presentation in the European Conference on Integrated Optics ECIO’99, 14-17 April 1999, Torino, Italy
15. I.Tomkos, I.Zacharopoulos, D.Syvridis, “Dual pump wave mixing in semiconductor optical amplifiers: Performance enhancement with long amplifiers” (full article), Photonics West ’99 SPIE International Conference, San Jose, U.S.A.
16. I.Tomkos, I.Zacharopoulos, E.Roditi, D.Syvridis, A.Uscov, “On the polarization sensitivity of a dual pump four wave mixing based wavelength converter”, International Photonics Conference IPC’98, 15-19 December, Taipei, Taiwan
17. I.Tomkos, I.Zacharopoulos, D.Syvridis, “An all-optical strict transparent wavelength conversion technique suitable for integration in transparent optical network nodes”, International Conference on Telecommunications ICT’99, Korea.
18. I.Tomkos, I.Zacharopoulos, D.Syvridis, T.Sphicopoulos, C.Caroumbalos, N.Theofanous, “Four wave mixing based wavelength conversion in semiconductor optical amplifiers: Experimental and theoretical results”, SPIE 2nd International Conference on New Laser Technologies and Applications, 1-4 June 1997, Ancient Olympia, Greece
19. I.Zacharopoulos, I.Tomkos, D.Syvridis, “Optimization of phase conjugator based on DSF four wave mixing”, 8th International Conference of Greek Physics Association, Ancient Olympia, 1999
20. I.Tomkos, I.Zacharopoulos, D.Syvridis, "Performance enhancement through dual pump four wave mixing in long SOAs”, 8th International Conference of Greek Physics Association, Ancient Olympia, 1999
