Fiber lasers 3 Passively Q-switched Saturable absorbers 3 Graphene 2 Optical pumping 2 Q switched lasers 2 Q switching 2 Absorption rates 1 All fiber 1 Angular momentum 1 Biomedical engineering 1 Chemical vapor deposition 1 Co-doped 1 Cross structures 1 Diffraction gratings 1 Dopant concentrations 1 Doped fiber 1 Erbium 1 Erbium doped fiber laser 1 Erbium ion 1 Ethylene 1 Fabrication 1 Fibers 1 Fundamental frequencies 1 Glass modifiers 1 Long-period fibre gratings 1 Minimum pulse widths 1 Modified chemical vapor depositions 1 Multiwavelength 1 Nickel oxide 1