SYSTEM USING THE PRINCIPLE OF PARAMETRIC AMPLIFICATION TO GENERATE SHORT OPTICAL PULSES OF A DURATION SHORTER THAN THE PERIOD OF THE OPTICAL CARRIER

摘要

The invention relates to a short optical pulse generator including: a generator (P,B1) of optical pulses having a wavelength equal to λ/2 and a spectral width smaller than λ/3; a generator (P, B2) of optical pulses having a duration shorter than 10 picoseconds at a wavelength of λ/3; a device (RI) recombining the pulses from the generators; a parametric amplification device (OPA1) receiving, as an input, the output from the recombining device; a filter (F2) extracting, from the output of the amplification device, a band centered on a wavelength λ; a second harmonic generator (SH) receiving the output of the filter (F2) and generating a band centered on a wavelength λ/2; and a programmable device (DCDP2) enabling a time-based adjustment of the pulses corresponding to said bands such as to make it possible to generate a pulse having a wavelength equal to λ/3 and a duration lower than the period of the optical cycle.