THEORY OF SOLITON STABILITY IN ASYNCHRONOUS MODELOCKING

A new type of fiber laser modelocking is examined where a phase modula tor is driven asynchronously with respect to a harmonic of the roundtr ip cavity frequency, An asynchronous drive is able to produce high rep etition rate (>1 GHz) soliton pulses that are shorter than the classic , active modelocking pulse width limit, It is shown that with a proper choice of fiber parameters, noise cleanup and soliton pulse shaping c an be obtained using filtering and asynchronous phase modulation, Limi ts of asynchronous detuning are derived and a comparison with the para meters ranges for synchronous phase modulation is also presented.