The design of grating monochromators for the spectral selection of extreme-ultraviolet femtosecond pulses without altering significantly the pulse time duration is discussed here. Time-preserving monochromators are realized in a single-grating configuration if the number of illuminated grooves is minimum for a given spectral resolution; therefore the grating time response is close to the Fourier limit for such a resolution. The classical-diffraction mount and the off-plane mount are compared for applications in the extreme-ultraviolet region-the classical mount should be preferred for monochromators with time responses in the 100-200 fs range, while the off-plane mount gives responses in the 10-50 fs range, and is therefore suitable to realize femtosecond time-preserving monochromators.
Grating monochromators for the spectral selection of femtosecond extreme-ultraviolet pulses
L Poletto
2011
Abstract
The design of grating monochromators for the spectral selection of extreme-ultraviolet femtosecond pulses without altering significantly the pulse time duration is discussed here. Time-preserving monochromators are realized in a single-grating configuration if the number of illuminated grooves is minimum for a given spectral resolution; therefore the grating time response is close to the Fourier limit for such a resolution. The classical-diffraction mount and the off-plane mount are compared for applications in the extreme-ultraviolet region-the classical mount should be preferred for monochromators with time responses in the 100-200 fs range, while the off-plane mount gives responses in the 10-50 fs range, and is therefore suitable to realize femtosecond time-preserving monochromators.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
