Experimental investigation on femtosecond laser pulse amplification by supercontinuum white light injection
Based on supercontinuum injection,a new method of high-energy femtosecond parametric amplification is put forward.The method overcomes the gain narrowing effect of the conventional 1 053 nm low-energy amplification and realizes the synchronization between 800 nm and 1 053 nm laser pulses.Through systematic experimental investigation,a broadband 1 053 nm laser pulse is obtained,with energy exceeding 4 mJ,which is the maximum energy obtained directly through a femtosecond OPA in the world.