Absorption rates 1 Chemical vapor deposition 1 Co-doped 1 Dopant concentrations 1 Doped fiber 1 Erbium 1 Erbium ion Fabrication 1 Fiber lasers 1 Glass modifiers 1 Graphene 1 Modified chemical vapor depositions 1 Multiwavelength 1 Nonlinear coefficient 1 Nonlinear effect 1 Nucleating agents 1 Optical pumping 1 Output power 1 Passively Q-switched 1 Potential applications 1 Power levels 1 Pulse energies 1 Pulsed fiber lasers 1 Pulsed laser sources 1 Pulsewidths 1 Pump power 1 Repetition rate 1 Saturable absorbers 1 Short pulse 1 Solution doping 1