期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
Spectral Properties of Ultrashort Pulsed Lorentz Beams in Far Field
摘要/Abstract
摘要：
研究了超短洛仑兹脉冲光束的远场频谱特性,给出了频率域中超短洛仑兹脉冲光束在自由空间传输的解析表达式,数值模拟了超短洛仑兹脉冲光束在不同传输距离处轴上和离轴的功率谱及在远场时不同衍射角的功率谱.结果表明,在远场衍射角不为0时,超短洛仑兹脉冲光束的光谱有红移现象,并且衍射角越大,红移量越大.
Abstract：
The spectral properties of the ult rashort pulsed Lorentz beams in far field are studied.The propag ation expression for the ult rashort pulsed Lorentz beams in frequence domain is given.The power spect rum of the ultrashort pulsed Lorentz beams on axis and off axis is studied by numerical method.The results show that the red shift appears when the angle of diff raction isn't equal zero in far field.The angle of diff raction is larger;the red shift is more serious.