Frequency Mode Locking in Erbium Doped Fiber Laser

: In this research, may insert of all the effects, such as dispersion, nonlinear, gain factor associated with the pumping pulse , attenuation and others in the conclusion the general equation for the propagation of the optical fiber through the laser resonator. In addition, the introduction of the effect of mode locking process using frequency modulation in order to get a stream ultrashort pulses. Selecting an suitable frequency modulated pulses achieved the stream could reach the stage of stability according to a certain number of trips round-trip (RT), since the highest frequency accompanied by a number less than the RT. On the other hand, the increase in R adversely affect the output pulses stream. The interval time between resulted pulses is inversely proportional to frequency modulated. stream pulses can be stable in the energy and pulse width with RT appropriate. increase factor 2  contribute to stability of pulses energy while 3  did not show any effects. The effect of the pumping energy represent of the 0 g worker showed that resulting energy increases with increases this factor. Pulse width 0 T initial and factor 2 T and modulated depth representing of their effects change method the oscillation of the factors resulting pulses.