Title :
Space-time profiles of an ultrashort pulsed Gaussian beam
Author :
Wang, Zhongyang ; Zhang, Zhengquan ; Xu, Zhizhan ; Lin, Qiang
Author_Institution :
Inst. of Opt. & Fine Mech., Acad. Sinica, Shanghai, China
fDate :
4/1/1997 12:00:00 AM
Abstract :
By using a different initial value from the previous treatments, we reveal that the pulsed Gaussian beam in free space can be expressed as a simple wave packet along with the complex time, which gives all the information about the spatial and temporal behaviors of the pulse. Then the space-time profiles of a space-time Gaussian pulse are studied. It is shown that even when the pulse propagates in free space, there exist couplings among the beam parameters in space and time. The spot-size-related couplings enlarge the temporal domain (TD) spatial size of the pulse and lessen the carrier frequency of the pulse of the paraxial points, and the wavefront-related couplings bend the transverse spatial shape of the pulse with the wavefront
Keywords :
high-speed optical techniques; laser beams; beam parameters; carrier frequency; complex time; couplings; free space; paraxial points; pulsed Gaussian beam; simple wave packet; space-time Gaussian pulse; space-time profiles; spatial behaviors; spot-size-related couplings; temporal behaviors; temporal domain spatial size; transverse spatial shape; ultrashort pulsed Gaussian beam; wavefront-related couplings; Laser beams; Lenses; Optical coupling; Optical distortion; Optical pulse shaping; Optical pulses; Pulse amplifiers; Pulse shaping methods; Shape; Ultrafast optics;
Journal_Title :
Quantum Electronics, IEEE Journal of
