Accordable repetition rate hybrid-type mode-locked fiber laser

We have observed and demonstrated the linear and non linear parameters dependent optimum power and repetition rates of a hybrid - type actively and passively mode locked laser pulses in an erbium doped fiber laser of the figure of eight geometry by using a nonlinear amplifying loop mirror (NALM) totally made up of microstructured optical fiber MOF as a saturable absorber and a nonlinear optical loop (NOL) incorporating an electro-optic modulator as an active mode locker. An accordable repetition rate fiber laser was obtained. The repetition rate and power of generated pulses depend on the NALM gain and the electro-optic modulator.