Chirped Pulse Amplification

Chirped pulse amplification at VISA-FEL

Chirped beam manipulations are of the great interest to the FEL (Free Electron Laser) community as potential means of obtaining ultra short X-ray pulses. The experiment is under way at the ATF (Accelerator Test Facility) at BNL (Brookhaven National Laboratory) to study the FEL process limits with the under-compressed chirped electron beam. High gain near-saturation SASE operation was achieved w...

Self-phase modulation in chirped-pulse amplification.

The effect of self-phase modulation in chirped-pulse amplification is investigated. A numerical model is used to predict the effects of phase modulation on pulse recompression, and experimental results are presented that agree well with the calculations. We show that even moderate self-phase modulation can significantly distort the recompressed pulse after amplification, thereby reducing the pe...

Chirped pulse Raman amplification in plasma

Raman amplification in plasma has been proposed to be a promising method of amplifying short radiation pulses. Here, we investigate chirped pulse Raman amplification (CPRA) where the pump pulse is chirped and leads to spatiotemporal distributed gain, which exhibits superradiant scaling in the linear regime, usually associated with the nonlinear pump depletion and Compton amplification regimes. ...

Development of cryogenically-cooled Yb:YLF chirped-pulse amplification laser for pumping few-cycle optical-parametric chirped-pulse amplification

As a pump source for intense few-cycle laser system with optical-parametric chirped-pulse amplification (OPCPA), we have been developing cryogenically-cooled Yb:YLF chirped-pulse amplification laser. So far we have successfully obtained high energy output pulse with 107 mJ of energy from a single-stage regenerative amplifier, which can be compressed to 2.2 ps in duration without pedestal. An ad...

Femtosecond free-electron laser by chirped pulse amplification.