Study On The Propagation Properties And Anomalous Spectral Behavior Of Ultrashort Pulsed Beams

Because of the application of the technologies of chirped pulse amplification (CPA) and optical parametric chirped pulse amplification (OPCPA), the ultra-intense and ultra-short laser pulse has been obtained. It provides technological means and extreme physical condition for the study of the high field physics, and it can be also applied to the study of instantaneous dynamic procedure in the biology and chemistry domain. From the emergence to application of ultrashort laser pulse, it is relevant to problems which ultrashort laser pulses propagate in free space, dispersive media (including grating, prism pairs, optical fiber and lens etc.), aperture and optical system. Therefore, the study, which spatiotemporal and spectral properties of ultrashort pulsed beams result from propagating in different media, has very important practical significance.The pulse duration, carrier frequency, central frequency and oscillatory optical cycles, which are the most basic concepts relating to ultrashort optical pulse, are introduced, and the many kinds of pulses usually used are also introduced. These pulses include a Gaussian pulse, a hyperbolic secant pulse, a Lorentzian pulse, a Poisson spectrum pulse, a asymmetrical hyperbolic secant pulse, a rectangular pulse, a chirped Gaussian pulse and a chirped super-Gaussian pulse. The dissertation presents a number of methods and theory involving in diffraction integral, Fourier transform, directly solving differential wave equation, vector analysis, which can be used to study ultrashort pulsed beams propagating in free space, linear dispersive...