Patent ID: 8508840

Claim:
A device for reducing the temporal distortions induced in light pulses by an optical frequency converter system, said system comprising at least one nonlinear optical component ( 4 ) having a nonlinear optical susceptibility χ of the order of 2 or 3, said converter system being capable of receiving at least one incident pulsed light beam ( 2 ), the incident light pulses having a duration Δt 0 , an optical frequency ω 0 ±Δω 0 and an intensity I 0 (t), and of generating, by frequency conversion, at least one output pulsed beam ( 3 ), the output light pulses having a duration Δt 1 , an optical frequency ω 1 ±Δω 1 different from ω 0 ±Δω 0 , and an intensity I 1 (t) that is a function of I 0 (t) β , β being a coefficient of saturation of the frequency converter, characterized in that said device comprises: a linear temporal filter ( 5 ) for amplitude pre-compensation arranged in the path of the incident beam ( 2 ) and capable of introducing an amplitude pre-compensation as a function of the optical frequency f of the form: H ccomp ⁡ ( f ) = 1 + γ comp 2 6 ⁢ f 2 where γ comp =(ω 1 /ω 0 )·γ/√β, γ being the spectral acceptance of the frequency converter for an intensity I comp , so as to reduce, at at least one compensation intensity I comp , the intensity temporal distortions induced in said frequency-converted output light pulses.