Repetition-Rate Multiplication in Actively Mode-Locked Fiber Lasers

Abstract

Active mode-locking has proved to be very effective in the generation of short, high repetition rate pulse train from fiber lasers. One of the limitation, however, is that the repetition rate of the pulses becomes limited by the frequency at which modulation is performed. It is, therefore, very challenging to find ways of increasing the repetition rate of the output pulses from an actively mode locked lasers without requiring any increase in the modulation frequency. Recently, Onodera et al. [1, 2] reported a novel scheme for several-fold multiplication in the repetition rate by applying rational detuning to the modulation frequency.