High-intensity femtosecond laser systems based on coherent combining of optical fields

作者：Bagayev S N^*; Trunov V I; Pestryakov E V; Leschenko V E; Frolov S A; Vasiliev V A

来源：Optics and Spectroscopy, 2013, 115(3): 311-319.

DOI：10.1134/S0030400X13090051

The basic design principles of high-intensity laser systems based on coherent combining of radiation of multichannel laser facilities are considered. The influence of the instability of parameters of individual beams on coherent combining efficiency is analyzed, and requirements on their values for realization of high-efficiency coherent combining are determined. The fundamental possibility of coherent combining of parametrically amplified femtosecond pulses is experimentally demonstrated for the first time. Combining pulses with an energy of similar to 1 mJ (pulse duration of 25-30 fs) with an efficiency exceeding 83% is realized by using a spherical mirror and a specially developed high-precision electro-optical relative time jitter stabilization scheme, which ensures its stability at similar to 170 as level. The analysis conducted and the experimental data confirm that there are no fundamental limitations on intensity scaling of the high-intensity laser system based on coherent combining being developed at the Institute of Laser Physics of the Siberian Branch of the Russian Academy of Sciences.

• 出版日期2013-9