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J1.  N. Papadakis, A. Hatziefremidis, A. Tserolas, P. Constantinou, “Wideband Propagation Measurements and Modeling in Indoor Environment”, International Journal of Wireless Information Networks, vol. 4, no. 2, pp. 101-111, 1997.

J2.  Α. Hatziefremidis, D. N. Papadopoulos, D. Fraser, H. Avramopoulos, “Laser-sources-for-polarized-electron-beams-in-cw-and-pulsed-accelerators”, Nuclear Instruments and Methods in Physics Research A, no. 431, pp. 46-52, 1999.

J3.   T. Papakyriakopoulos, K. Vlachos, A. Hatziefremidis, H. Avramopoulos, “Optical Clock Repetition Rate Multiplier for High Speed Digital Optical Logic Circuits”, Optics Letters, vol. 24, no. 11, pp. 717-719, 1999.

J4.   T. Papakyriakopoulos, K. Vlachos, A. Hatziefremidis and H. Avramopoulos, “20-GHz broadly tunable and stable mode-locked semiconductor amplifier ring laser”, Optics Letters, vol. 24, no. 17, pp. 1209-1211, 1999.

J5.    T. Houbavlis, K. Zoiros, A. Hatziefremidis, H. Avramopoulos, L. Occhi, G. Guekos, S. Hansmann, H. Burkhard and R. Dall’Ara, “10 Gbs all-optical boolean XOR with SOA fiber Sagnac gate”, Electronics Letters, vol. 35, no. 19, pp. 1650-1652, 1999.

J6.   K. Vlachos, G. Theophilopoulos, A. Hatziefremidis and H. Avramopoulos, “30 Gbs All-Optical Clock Recovery Circuit”, Photonics Technology Letters,   vol. 12, no. 6, pp. 705-707, June 2000.

J7. K. Zoiros, T. Stathopoulos, K. Vlachos, A. Hatziefremidis, T. Houbavlis, T. Papakyriakopoulos and H. Avramopoulos, “Experimental and theoretical studies of a high repetition rate fiber laser, mode-locked by external optical modulation”, Optics Communications, vol. 180, issue 4-6, pp. 301-315, June 2000.

J8.  N. Pleros, G. T. Kanellos, C. Bintjas, A. Hatziefremidis and H. Avramopoulos, Optical Power Limiter using a saturated SOA-based Interferometric Switch”, Photonics Technology Letters, IEEE  ,Volume: 16 , Issue: 10 , Pages:2350 – 2352, Oct. 2004

J9. A. Hatziefremidis, E. Kehayas, D. Tsiokos, G.T. Kanellos, L. Stampoulidis and H. Avramopoulos, “Header separation and reinsertion for 10-Gbits variable-length optical packets”, Optical Engineering, Volume 44, Issue 3, March 2005.

J10.A. Hatziefremidis, G. Theophilopoulos and K. Vlachos, “50-GHz, ultrastable, polarization-maintaining semiconductor fiber ring laser”, Optical Engineering, Volume 44, Issue 6, June 2005.

J11. Z. V. Rizou, K. E. Zoiros, A. Hatziefremidis and M. J. Connelly, “Design Analysis and Performance Optimization of a Lyot filter for SOA Pattern Effect Suppression”, Quantum Electronics III, volume 19,  Issue 5, 2013

J12. Amoiralis, M. A. Tsili, V. Spathopoulos and A. Hatziefremidis, “Energy Efficiency Optimization in UAVs a review_paper” Materials Science Forum Vol. 792 (2014) pp 281-286 © (2014) Trans Tech Publications, Switzerland

J13. A. Hatziefremidis, V. Spathopoulos, E. I. Amoiralis and M. A. Tsili, “Investigation of shielding material_paper”, Materials Science Forum Vol. 792 (2014) pp 311-315 © (2014) Trans Tech Publications, Switzerland

J14. Z.V. Rizou , K.E.Zoiros, A. Hatziefremidis, “Semiconductor optical amplifier pattern effect suppression with passive single microring resonator-based notch filter“, Optics Communications, Vol. 329, 15 October 2014, Pages 206-213

J15. Zoe V. Rizou, Kyriakos E. Zoiros, A. Hatziefremidis, Michael J. Connelly, “Performance tolerance analysis of birefringent fiber loop for semiconductor optical amplifier pattern effect suppression”, Appl. Phys. B, Volume 119, Issue 2, pp 247-257, May 2015

J16. K. E. Zarganis, A. Hatziefremidis,Performance Analysis of Coherent Optical OFDM Applied to UAV Mobile FSO Systems”, American Journal of Optics and Photonics, 3(1), 5-12, 2015

J17. Z. V. Rizou, K. E. Zoiros, A. Hatziefremidis,Comparison of basic notch filters for semiconductor optical amplifier pattern effect mitigation”, Applied Sciences (Switzerland), Volume 7, Issue 8, 2 August 2017, Article number 783

J18. P. S. Bithas, A. G. Kanatas, D. B. da Costa, P. K. Upadhyay, A. Hatziefremidis, “Novel Results for the Multivariate Ricean Distribution With Non-Identical Parameters“, IEEE Transactions on Vehicular Technology, Volume: 68 , Issue: 5 , May 2019

J19. Athanasios Lioumpas, Petros S. Bithas, A.Hatziefremidis, “Coordinated tethering for devices with multi-RAT capabilities: An algorithmic solution and performance analysis“, Elsevier, Physical Communication, vol. 37, 2019

J20. Nikolaos Nomikos, Panagiotis Trakadas, A. Hatziefremidis, and Stamatis Voliotis, “Full-Duplex NOMA Transmission with single antenna buffer aided relays“, Electronics, vol. 8, pp.1482, 2019

J21 . Angelos Angelopoulos, Emmanouel T. Michailidis, Nikolaos Nomikos, Panagiotis Trakadas, A. Hatziefremidis, Stamatis Voliotis and Theodore Zahariadis, “Tackling Faults in the Industry 4.0 Era—A Survey of Machine-Learning Solutions and Key Aspects“, Sensors, vol. 20, pp. 109, 2020