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Rahman, A. , Thapa, S. , Fan, S. , Dutta, N.. "Mode-Locked Fiber Laser Using Charcoal and Graphene Saturable Absorbers to Generate 20-GHz and 50-GHz Pulse Trains, Respectively". World Academy of Science, Engineering and Technology, Open Science Index 199, International Journal of Physical and Mathematical Sciences, (2023), 17(7), 69 - 77.