Wavelength tuning of femtosecond pulses generated in nonlinear crystals by using diffractive lenses.
We demonstrate that diffractive lenses (DLs) can be used as a simple method to tune the central wavelength of femtosecond pulses generated from second-order nonlinear optical processes in birefringent crystals. The wavelength tunability is achieved by changing the relative distance between the nonlinear crystal and the DL, which acts in a focusing configuration. Besides the many practical applications of the so-generated pulses, the proposed method might be extended to other wavelength ranges by demonstrated similar effects on other nonlinear processes, such as high-order harmonic generation.
GROC·UJI, Departament de Física, Universitat Jaume I, 12080 Castelló, Spain. gminguez@uji.es
G
G
Mínguez-Vega
C
C
Romero
O
O
Mendoza-Yero
J R
JR
Vázquez de Aldana
R
R
Borrego-Varillas
C
C
Méndez
P
P
Andrés
J
J
Lancis
V
V
Climent
L
L
Roso