Impact of high-frequency spectral phase modulation on the temporal profile of short optical pulses.
The impact of high-frequency spectral phase modulation on the temporal intensity of optical pulses is derived analytically and simulated in two different regimes. The temporal contrast of an optical pulse close to the Fourier-transform limit is degraded by a pedestal related to the power spectral density of the spectral phase modulation. When the optical pulse is highly chirped, its intensity modulation is directly related to the spectral phase variations with a transfer function depending on the second-order dispersion of the chirped pulse. The metrology of the spectral phase of an optical pulse using temporal-intensity measurements performed after chirping the pulse is studied. The effect of spatial averaging is also discussed.
Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, NY 14623-1299, USA. cdorrer@lle.rochester.edu
Christophe
C
Dorrer
Jake
J
Bromage
D003198:Computer Simulation; D008027:Light; D008962:Models, Theoretical; D012815:Signal Processing, Computer-Assisted; D013057:Spectrum Analysis / Q000379:methods*