The approximate analytical expressions of the apertured broadband beams in the far field with Gaussian and Laguerre-Gaussian spatial modes are presented. For the radially polarized Laguerre-Gaussian beam, the result r...The approximate analytical expressions of the apertured broadband beams in the far field with Gaussian and Laguerre-Gaussian spatial modes are presented. For the radially polarized Laguerre-Gaussian beam, the result reveals that the electromagnetic field in the far field is transverse magnetic. The influences of bandwidth (Г) and truncation parameter (Co) on the transverse intensity distribution of the Gaussian beam and on the energy flux distribution of radially polarized Laguerre-Gaussian beam are analysed.展开更多
We address the impact of imprinted fading optical lattices on the beam evolution of solitons in strongly nonlocal nonlinear media. The results show that the width of the soliton experiences a change with the increasin...We address the impact of imprinted fading optical lattices on the beam evolution of solitons in strongly nonlocal nonlinear media. The results show that the width of the soliton experiences a change with the increasing propagation distance, the critical power for the soliton varies with the lattice fading away, and the soliton breathing is affected by the initial lattice depth and the nonlocality degree.展开更多
基于Dini级数展开,导出了p(>0)阶准离散Hankel变换(the pth-order quasi-discrete Hankel transform based on Dini series expansion,pDQDHT)算法,并给出了该算法在光束传输中的应用.通过不同输入函数分别对pDQDHT算法进行测试及光...基于Dini级数展开,导出了p(>0)阶准离散Hankel变换(the pth-order quasi-discrete Hankel transform based on Dini series expansion,pDQDHT)算法,并给出了该算法在光束传输中的应用.通过不同输入函数分别对pDQDHT算法进行测试及光束通过透镜传输的应用实例,结果表明:pDQDHT算法不仅精度高于现有的Hankel变换算法,可以进行多次正、逆变换,能广泛应用于光束分步传输问题,而且执行速度也与一般的快速Hankel变换算法相当.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 10375023, the Program for NCET (No 04-0784), and the Key Project of the Ministry of Education of China (No 205110).
基金supported by the Doctorial Start-up Fund of Hengyang Normal University,China (Grant No. 09B06)the Natural Science Foundation of Hunan Province,China (Grant No. 08jj3001)
文摘The approximate analytical expressions of the apertured broadband beams in the far field with Gaussian and Laguerre-Gaussian spatial modes are presented. For the radially polarized Laguerre-Gaussian beam, the result reveals that the electromagnetic field in the far field is transverse magnetic. The influences of bandwidth (Г) and truncation parameter (Co) on the transverse intensity distribution of the Gaussian beam and on the energy flux distribution of radially polarized Laguerre-Gaussian beam are analysed.
基金Project supported by the Doctorial Start-up Fund of Hengyang Normal University, China (Grant No. 11B42)the Natural Science Foundation of Hunan Province, China (Grant No. 12JJ6001)the Construct Program of the Key Discipline in Hunan Province, China
文摘We address the impact of imprinted fading optical lattices on the beam evolution of solitons in strongly nonlocal nonlinear media. The results show that the width of the soliton experiences a change with the increasing propagation distance, the critical power for the soliton varies with the lattice fading away, and the soliton breathing is affected by the initial lattice depth and the nonlocality degree.
文摘基于Dini级数展开,导出了p(>0)阶准离散Hankel变换(the pth-order quasi-discrete Hankel transform based on Dini series expansion,pDQDHT)算法,并给出了该算法在光束传输中的应用.通过不同输入函数分别对pDQDHT算法进行测试及光束通过透镜传输的应用实例,结果表明:pDQDHT算法不仅精度高于现有的Hankel变换算法,可以进行多次正、逆变换,能广泛应用于光束分步传输问题,而且执行速度也与一般的快速Hankel变换算法相当.