FREQUENCY-DRIFT FIBRE AMPLIFIER WITH NONLINEAR COMPENSATION

摘要

The invention relates to a frequency-drift fibre amplifier (1) with nonlinear compensation, that comprises means (5) for generating a light pulse (10) having an initial power P0 and an initial duration T, a stretcher (2) including at least one optical diffraction network (7) having a line density higher than 1200 lines/mm and capable of time-stretching the pulse (10) and of inserting a time asymmetry in the stretched pulse (12), an amplification fibre (3) including a doped optical fibre section coupled with an optical pumping means (4) and capable of amplifying the stretched pulse (12) for producing a pulse having a power P, a compressor (6) with an optical diffraction network (8) capable of time-compressing the amplified pulse (14) so that the stretcher (2) and the compressor (6) are misaligned, the misalignment between the stretcher and the compressor being capable of simultaneously compensating second- and third-order nonlinear scattering in the amplification optical fibre (3) during the propagation of the pulse having an initial power P0 through the frequency-drift amplifier.