Front cover image for Ultrashort laser pulse generations and amplifications in fiber systems, and temporal pulse shaping

Ultrashort laser pulse generations and amplifications in fiber systems, and temporal pulse shaping

Shian Zhou
This thesis presents a numerical and experimental investigation of the high power ultrashort laser pulse and its applications to photocathode in the next generation of light sources. The primary emphasis of this work has been on the development of the ultrashort Yb-doped fiber laser and pulse amplification. A series of experiments were performed to explore some important properties of the Yb-doped fiber laser, such as its wavelength tunability, long cavity, and passive harmonic mode-locking. The interaction between nonlinearity and third-order dispersion of the femtosecond pulse in fiber chirped-pulse amplification were numerically and experimentally investigated. The result will allow for the development of nonlinear chirped-pulse amplification. A novel technique, divided-pulse amplification, is proposed and demonstrated for ultrashort pulse amplification in both femtosecond and picosecond range. The design of the pulse divider and recombiner is presented based on the birefrengent crystal stack. A new method is proposed to temporally shape Gaussian pulse into flat-top pulse with high efficiency
Thesis, Dissertation, English, 2007
Cornell University