| 摘要 |
A system for generating short optical pulses having a very high temporal contrast at a wavelength λ, includes: a generator of optical pulses B1 outputting pulses at a wavelength substantially equal to λ; a generator of optical pulses P, B2 outputting pulses at a wavelength substantially equal to 2*λ3; a device R for recombining the pulses from the generators; a parametric amplifier A receiving the output of the recombination device R as an input; a filter F2 extracting, from the output of the parametric amplification device A, a band centered about a wavelength equal to 2*λ; a second harmonic generator NL receiving the output of the filter F2, at the input; a filter F3 centered about a wavelength equal to λ, extracting the second harmonic wavelengths of the pulses produced by the second harmonic generator NL. |
| 主权项 |
1. System for generating short optical pulses having a very high temporal contrast, with a spectrum centred at a wavelength λ, using the principle of the parametric amplification, which comprises:
a first generator of optical pulses (B1, S) outputting pulses of a duration less than 10 picoseconds at a wavelength substantially equal to λ, a second generator of optical pulses (B2, P) outputting pulses of a duration less than 10 picoseconds at a wavelength substantially equal to 2*λ/3, a recombination device (R) for collinearly recombining the pulses from the first and second generator, a parametric amplification device (A) receiving the output of said recombination device as input (R), a filter (F2) extracting from the output of the parametric amplification device (A) a band centred about a wavelength substantially equal to 2*λ, a second harmonic generator (NL) receiving the output of said preceding filter as input (F2), another filter (F3) centred about a wavelength substantially equal to A, extracting the second harmonic wavelengths of the pulses produced by said second harmonic generator (NL). |
