Characterization of Erbium Doped Fiber Ring Laser

In this study, the output power and wavelength tuning performance of ring type erbium doped fiber laser (EDFL) were examined theoretically and experimentally. In order to investigate the effects of parameters such as erbium doped fiber (EDF) length, output coupler ratio, erbium ion density, pump power on the performance of ring-type EDFL, two-level model of EDFL was numerically analyzed and experimental characterization measurements were performed using an EDFL setup. Numerical results, which are in good agreement with the experimental measurements, showed that optimization of the parameters is extremely important for ring type EDFL performance. With the obtained optimum parameters, a moderate output power level (~+4.5 dBm) and a wide wavelength tuning range (~80 nm) covering C+L bands have been achieved.