Title :
Optical Gating With Asymmetric Field Ratios for Isolated Attosecond Pulse Generation
Author :
Cunningham, Eric ; Zenghu Chang
Author_Institution :
Univ. of Central Florida, Orlando, FL, USA
Abstract :
A technique to improve double optical gating for generating isolated attosecond pulses is introduced. In this method, the ratio between the amplitudes of the counter-rotating pulses is altered to decrease the field strength prior to the linearly-polarized gate cycle. The result is a decrease in the preionization of the gas target used for generating high-order harmonics. In addition to improving phase matching and increasing the saturation intensity, this development also allows isolated attosecond pulse production with longer driving laser pulses.
Keywords :
high-speed optical techniques; ionisation; laser beams; asymmetric field ratios; counter-rotating pulses; field strength; high-order harmonics; isolated attosecond pulse generation; optical gating; phase matching; preionization; saturation intensity; Frequency conversion; Ionization; Logic gates; Optical polarization; Optical retarders; Photonics; Polarization; Optical gating; extreme ultraviolet supercontinuum; high-harmonic generation; highharmonic generation; isolated attosecond pulses;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2015.2426655