Generation of third harmonic of femtosecond laser emission in propagation pulses in air  

作　　者：奚婷婷 张杰 鲁欣 郝作强 杨辉 董全力 武慧舂 

机构地区：[1]Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China

出　　处：《Chinese Physics B》2006年第9期2025-2029,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Grant Nos 10374116, 10390160 and 60478047） and the National Hi-tech ICF Programme.

摘　　要：The main characteristics of the third harmonic emission generated by femtosecond laser pulses propagating in air are investigated by numerically solving the coupled nonlinear Schrodinger equations. Strong third harmonic emission is observed with a maximum conversion efficiency as high as 0.43%. The on-axis phase difference between fundamental beam and third harmonic is investigated. The result is in good agreement with the phase-locking mechanism. Dependence of the conversion of third harmonic emission on focusing conditions is also studied. The results are also compared with those of experiments.The main characteristics of the third harmonic emission generated by femtosecond laser pulses propagating in air are investigated by numerically solving the coupled nonlinear Schrodinger equations. Strong third harmonic emission is observed with a maximum conversion efficiency as high as 0.43%. The on-axis phase difference between fundamental beam and third harmonic is investigated. The result is in good agreement with the phase-locking mechanism. Dependence of the conversion of third harmonic emission on focusing conditions is also studied. The results are also compared with those of experiments.

关 键 词：third harmonic emission plasma channel 

分 类 号：O43[机械工程—光学工程]