WASET
    Ashiq Rahman and  Sunil Thapa and  Shunyao Fan and  Niloy K. Dutta,  Mode-Locked Fiber Laser Using Charcoal and Graphene Saturable Absorbers to Generate 20-GHz and 50-GHz Pulse Trains, Respectively.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    July 2023, vol. 199(7). 69 - 77
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/10013171.