All-fiber supercontinuum generator with high-energy pulses

Super-continuum generation in non-linear optical fibres pumped with ultra-short light pulses (within femtosecond to nanosecond range) is usually accompanied by decay of the pumping pulse into several (or a plurality) of super-continuum pulses with different energies. In time domain this corresponds to a super-continuum pulse train where intervals between pulses are of the same order as the pulse duration or longer. When pumped with nanosecond pulses the super-continuum pulses retain their integrity at nanosecond scale, that´s why in this case super-continuum pulses can be characterised by such parameters as pulse energy, duration, etc. Recent progress in development of high-energy nanosecond mode-locked fibre master oscillators with ultra-long resonators enables creation, on the basis of such lasers, of all-fibre super-continuum generators with relatively high pulse energies. In the present paper for the first time the results of investigations into such super-continuum generator with 40-muJ pulse energy are reported.