Mid-infrared-to-mid-ultraviolet supercontinuum enhanced by third-to-fifteenth odd harmonics.
A high-energy supercontinuum spanning 4.7 octaves, from 250 to 6500 nm, is generated using a 0.3-TW, 3.9-μm output of a mid-infrared optical parametric chirped-pulse amplifier as a driver inducing a laser filament in the air. The high-frequency wing of the supercontinuum spectrum is enhanced by odd-order optical harmonics of the mid-infrared driver. Optical harmonics up to the 15th order are observed in supercontinuum spectra as overlapping, yet well-resolved peaks broadened, as verified by numerical modeling, due to spatially nonuniform ionization-induced blue shift.
A V
AV
Mitrofanov
A A
AA
Voronin
S I
SI
Mitryukovskiy
D A
DA
Sidorov-Biryukov
A
A
Pugžlys
G
G
Andriukaitis
T
T
Flöry
E A
EA
Stepanov
A B
AB
Fedotov
A
A
Baltuška
A M
AM
Zheltikov
D007259:Infrared Rays; D007834:Lasers; D055620:Optical Phenomena; D014466:Ultraviolet Rays