S. N. F. Zuikafly, F. Ahmad, M. H. Ibrahim, A. Abdul Latiff, and S. W. Harun, “Dual-wavelength passively Q-switched Erbium-doped fiber laser with MWCNTs slurry as saturable absorber”, Photonics Lett. Pol., vol. 8, no. 4, pp. pp. 98–100, Dec. 2016.