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The time delay(TD) of femtosecond pulses is studied for the first time, which generated from the nonlinear optical loop mirror composed of dispersion decreasing fiber(DDF-NOLM). The results show that the higher-order dispersion and high order nonlinearities such as Raman frequency shift play a key role in producing TD, and that the time delay can be suppressed by the third-order dispersion(TOD) in DDF-NOLM. The mechanism of the time delay suppression is also discussed in detail.
The time delay (TD) of femtosecond pulses is studied for the first time, which results from the nonlinear optical loop mirror composed of dispersion decreasing fiber (DDF-NOLM). The results show that the higher-order dispersion and high order nonlinearities such as The mechanism of the time delay suppression is also discussed in detail.