Nur Nadhirah Mohamad Rashid, et al. “Passively Q-Switched Erbium-Doped Fibre Laser Based on Graphene-Chitin Saturable Absorber”. Journal of Advanced Research in Applied Sciences and Engineering Technology, vol. 33, no. 1, Oct. 2023, pp. 44-52, doi:10.37934/araset.33.1.4452.