超短辛格高斯脉冲光束的频谱性质  

Spectrum Property of Ultrashort Sinc-Gaussian Pulsed Beams

作　　者：杨振峰[1] 杨振军[2] 

机构地区：[1]河北科技大学经济管理学院,石家庄050018 [2]河北师范大学物理科学与信息工程学院,石家庄050016

出　　处：《光子学报》2007年第B06期81-83,共3页Acta Photonica Sinica

基　　金：河北省教育厅科学研究计划(2006111)资助

摘　　要：给出了自由空间中超短辛格高斯脉冲光束在频率域传输的方程.对超短辛格高斯脉冲光束的功率谱进行了研究。结果表明:超短辛格高斯脉冲光束的轴外频谱具有红移、频谱变窄等性质.超短辛格高斯脉冲光束的光谱在衍射角不为零时有红移现象,并且随着衍射角的增加光谱红移也逐渐增大,频谱宽度逐渐变窄.在十倍瑞利距离处的数值模拟结果表明,衍射角等于3°时的频谱宽度仅为衍射角为0°时频谱宽度的四分之一.The propagation expression for the ultrashort Sinc-Gaussian pulsed beams in frequence domain is given. The spectrum property of the ultrashort Sinc-Gaussian pulsed beams is studied. The results show that the red shift appears when the angle of diffraction is not equal to zero in far field, and the spectrum width of the ultrashort Sinc-Gaussian pulse beams becomes narrow with the angle of diffraction increasing in far field. The numerical simulation shows that the spectrum width with the angle of diffraction equal to 0° is four times as large as the spectrum width with the angle of diffraction equal to 3° at the ten Rayleigh distances.

关 键 词：激光技术 超短辛格高斯脉冲光束 光谱红移 

分 类 号：TN241[电子电信—物理电子学]