Smoothing the side lobes of a focused pattern by spectral dispersion in the broadband laser

被引：3
|
作者：
Peng, Runwu
Tang, Zhixiang
Ye, Yunxia
Zhao, Chujun
Wen, Shuangchun
Fan, Dianyuan
机构：
[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
[2] Hunan Univ, Sch Comp & Commun, Changsha 410082, Peoples R China
来源：
OPTIK | 2007年 / 118卷 / 12期
基金：
高等学校博士学科点专项科研基金; 中国国家自然科学基金; 国家高技术研究发展计划(863计划);
关键词：
spectral dispersion; smoothing effect; dispersive wedge; broadband laser;
D O I：
10.1016/j.ijleo.2006.06.001
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Starting from the Huygens-Fresnel diffraction integral, the propagation equations of a broadband laser passing through a dispersive lens and a dispersive wedge are derived. Smoothing effect on the side lobes of the focused pattern is achieved as the broadband laser passes through the lens because of the spectral dispersion of the lens. By inserting a dispersive wedge behind the lens, better smoothing effect is realized because a relative position shift between focused patterns of different frequency components is generated due to the spectral dispersion of the wedge. Smoothing effect on the side lobe is obtained even with small bandwidth of the broadband laser as the wedge is used. (c) 2006 Elsevier GmbH. All rights reserved.
引用
收藏
页码：594 / 598
页数：5
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