Abstract :The optical burst switching (OBS) paradigm is an intermediate optical switching solution between optical packet switching (OPS) and optical circuit switching (OCS). In addition, OBS has enormous bandwidths that can satisfy the requirements of bandwidth applications and the growing number of end users. OBS, suffer from burst contention due to a lack of optical buffers. This problem results in a high burst loss ratio and increased end-to-end delay thus degrading the performance of the OBS network. This study has proposed a Fuzzy Offset Time algorithm (FOTA) to address the above issues. The fuzzy input is made up of three parameters: B.Size, Distance, and Q.Delay. In this study, Five defuzzification techniques are used centroid, bisector, largest of maximum, smallest of maximum, and mean of maximum (CM00, BM04, LM02, SM03, MM01 respectively) applying to both maximum and algebraic sum accumulation techniques using fiber delay schemes. The results FOTA show the defuzzification (LM02 and LS02) have effects in reducing BLR (burst loss ratio) while the defuzzification (SM03 and LS02) have effects in reducing end-2-end delayed respectively.