Slowdown of The Group Velocity in Tm~(3+)-doped Optical Fiber
Qiu We
According to the transition rates equation of the ground state population and the propagation equation,the numerical model of the group velocity slowdown was established. The relationship between the gain and pump power was analysized. In the absorption area of Tm3 +-dopedoptical fiber,the oscillation leads the pulse to experience absorption saturation,and the propagation delays.In the gain area of Tm3 +-doped optical fiber,this effect induces the pulse to experience gain saturation,and the propagation is in advance. According to the theoretical calculation,the group velocity slowdown is tunable due to coherent population oscillation in the Tm3 +-doped optical fiber amplifier at room temperature.
Chinese Journal of Luminescence•Jan 1, 2015•0 citations