A Theoretical Study Of High-power Ultrashort Pulse Laser Method

The high power ultra short pulse laser in the superelevation energy density physics, laser research areas and so on plasma physics, strong field physics, plasmatron and X beam laser, has extremely widespread and the important application.In addition, the superelevation power, the superelevation intensity laser installment carries out "the quick ignition" the laser fusion, under the exploration extreme condition the material behavior and so on the significant scientific research essential method.Designed one kind to obtain the high efficiency ultra short pulse laser the new plan, and has analyzed this kind of plan scientific nature and the rationality from the theory angle.This design proposal is moves Q and the mode locking technique unifies obtains the high efficiency ultra short pulse laser, but the tradition obtains the ultra short pulse the method is the independent employment adjusts Q or the mode locking.Two traditional methods obtain the ultra short pulse width and the power have the characteristic respectively, adjusts pulse width which Q obtains pulse width which obtains compared to the mode locking, the peak power not high which obtains compared to the mode locking.When will adjust which the short pulse characteristic which Q and the mode locking organic synthesis will obtain the high efficiency ultra short pulse to have adjusts Q and mode locking independent employment obtains.This plan adjusts the Q again mode locking first, adjusts Q to use the pulse transmission type (PTM) electric light to adjust Q, like this outputs the efficiency is higher, arteries width; The mode locking uses the semiconductor to be possible to absorb the mirror (SESAM) mode locking technique saturated, like this designs the laser structure is simple. The detailed introduction semiconductor has been possible to absorb mirror (SESAM) saturated, and has carried on the analysis and the computer value simulation to the LD pump entire solid state laser thermal reaction, prepares for the laser design. Has conducted the research to the LDA collimation, proposed one new collimation method, and has carried on the computer simulation to this kind of collimation system.