B., Das 1M., . F. L. Abdullah2023-03-202023-03-202018-05-01B. Das 1 , M. F. L. Abdullah. DEVELOPMENT OF OPTICAL SIGNAL REGENERATION TECHNIQUE USING ULTRASCALE FIELD PROGRAMMING GATE ARRAYS. Journal of Fundamental and sciences. vol.10, no 2. May 2018. Faculty of exact sciences. university of el oued. [visited in 23/03/2018]. available from [http://www.jfas.info]http://dspace.univ-eloued.dz/handle/123456789/17454articalThe optical signal regeneration is a demanding research area for long-haul optical communication systems. The existing optical signal regeneration techniques are not facilitating for low BER in real-time. In this paper, a new optical signal regeneration technique is developed that provides low BER in real-time for 10Gb/s optical degraded signal for Differential Phase Shift Keying (DPSK) signal at different transmission distances between 50 km to 250 km. The developed optical signal regeneration technique has achieved a very low Bit Error Rate (BER) of 10 -13 at low received the power of -17 dBm averagely for DPSK signal at different transmission distances experimentally via UltraScale FPGA.enBit Error Rate (BER); Differential Phase Shift Keying (DPSK) signal; Optical Signal Regeneration, Field Programming Gate ArrayArticle