The Gaussian doping is used to optimize the performance of InP/InGaAs uni-traveling-carrier photodiode (UTC-PD) in this letter. The UTC-PD structure is modeled with drift-diffusion approach and the comparisons of the characteristics for four UTC-PDs with
Self-pulsation effects of cladding-pumped Erbium-Ytterbium co-doped fiber laser (EYDFL) at around the lasing threshold are investigated. It is demonstrated that laser output of the Erbium-Ytterbium co-doped fiber under the bi-directional pumping regime is