Title :
Sub-5-fs transform-limited visible pulse source and its application to real-time spectroscopy
Author :
Kobayashi, Takayoshi ; Shirakawa, Akira ; Fuji, Takao
Author_Institution :
Dept. of Phys., Univ. of Tokyo, Japan
Abstract :
Transform-limited (TL) visible pulses with as short a duration as 4.7 fs with a 5-μJ pulse energy have been generated for the first time from a novel noncollinear optical parametric amplifier. Both signal-idler group-velocity matching and pulse-front matching are essential to generate coherent down-converted pulses compressible to the TL pulse with more than 150 THz bandwidth. Tunable operation with bandwidth-limited sub-10-fs pulses in the visible (550-700 nm) and near-infrared (900-1300 nm) ranges, achieved by increasing the seed chirp, is also a marked property. Applications for ultrafast spectroscopy of the sub-5-fs pulse source to the real-time spectroscopy of conjugated polymer, a dye molecule, and J-aggregates are also described
Keywords :
high-speed optical techniques; optical parametric amplifiers; optical pulse generation; visible spectroscopy; 10 fs; 150 THz; 4.7 fs; 5 muJ; 550 to 700 nm; 900 to 1300 nm; J-aggregates; TL pulse; bandwidth-limited pulses; coherent down-converted pulses; conjugated polymer; dye molecule; matching; near-infrared range; noncollinear optical parametric amplifier; pulse compressibility; pulse duration; pulse energy; pulse source; pulse-front matching; real-time spectroscopy; real-time spectroscopy application; signal-idler group-velocity matching; transform-limited visible pulse source; transform-limited visible pulses; ultrafast spectroscopy; visible ranges; Nonlinear optics; Optical amplifiers; Optical pulse generation; Optical pulses; Pulse amplifiers; Pulse compression methods; Semiconductor optical amplifiers; Spectroscopy; Stimulated emission; Ultrafast optics;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/2944.974223
