Two interacting light filaments with different initial phases propagating in air are investigated numerically by using a ray tracing method. The evolution of the rays of a filament is governed by a potential field. Du...Two interacting light filaments with different initial phases propagating in air are investigated numerically by using a ray tracing method. The evolution of the rays of a filament is governed by a potential field. During propagation, the two potential wells of the two filaments can merge into one or repel each other, depending on the initial phase difference between the two filaments. The study provides a simple description of the interacting filaments.展开更多
We show the intensity control of filamentation in fused silica by temporally shaping the femtosecond laser pulse.The arbitrary control of filamentation intensity has been obtained by the feedback control based on the ...We show the intensity control of filamentation in fused silica by temporally shaping the femtosecond laser pulse.The arbitrary control of filamentation intensity has been obtained by the feedback control based on the genetic algorithm,and the peak intensity of filament has changed from about 670 to around 2100(charge-coupled device counts).This modulation is in qualitative agreement with the simulation results.It is shown that the control of the intensity is realized by modulating the peak power of the shaped pulse.展开更多
基金Project supported by the National Natural Science Foundation of China （Grant Nos 60621063, 10334110, 10425416, 10634020 and 60478047）, the National Key Basic Research Special Foundation of China （Grant No G1999075206）, and the National Hi-Tech ICF Programme.
文摘Two interacting light filaments with different initial phases propagating in air are investigated numerically by using a ray tracing method. The evolution of the rays of a filament is governed by a potential field. During propagation, the two potential wells of the two filaments can merge into one or repel each other, depending on the initial phase difference between the two filaments. The study provides a simple description of the interacting filaments.
基金supported by the National Natural Science Foundation of China(Nos.11774038,11874056,and 11474039)the Taishan Scholar Project of Shandong Province
文摘We show the intensity control of filamentation in fused silica by temporally shaping the femtosecond laser pulse.The arbitrary control of filamentation intensity has been obtained by the feedback control based on the genetic algorithm,and the peak intensity of filament has changed from about 670 to around 2100(charge-coupled device counts).This modulation is in qualitative agreement with the simulation results.It is shown that the control of the intensity is realized by modulating the peak power of the shaped pulse.
基金Supported by National Natural Science Foundation of China(NSFC)(11874056,11774038,11474039)Youth Innovation Promotion Association of Chinese Academy of Sciences(2014143)Taishan Scholar Project of Shandong Province。
