Analysis of an efficient single-mode fiber coupler for all-fiber rotational Raman lidar

被引：6

作者：

Li, Shichun ^{[1
]}

Hua, Dengxin ^{[1
]}

Wang, Li ^{[1
]}

Song, Yuehui ^{[1
]}

机构：

[1] Xian Univ Technol, Sch Mech & Precis Instrument Engn, Xian 710048, Peoples R China

来源：

OPTIK | 2013年 / 124卷 / 13期

基金：

中国国家自然科学基金;

关键词：

Rotational Raman lidar; Single-mode fiber coupler; Graded-index lens; RANDOM ANGULAR JITTER; PLANE-WAVE; COLLIMATORS; SPACE; LIGHT;

D O I：

10.1016/j.ijleo.2012.03.080

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Consider comprehensively alignment errors and the central obstacle, an expression of coupling efficiency based on free-space optical coupling is derived, then the influence of these factors on coupling efficiency is numerically evaluated. An efficient single-mode fiber coupler with a graded-index lens is tailor-made and optimized for Raman lidar using optical software. Simulation results show that this optimized coupling scheme may make the coupling efficiency to increase by 44.5% for Gaussian beam than without a graded-index lens if lidar returning signals parallel to optical axial is only considered, and that the multi-core fiber may redouble the optical energy coupled into all-fiber spectroscope. (C) 2012 Elsevier GmbH. All rights reserved.

引用

页码：1450 / 1454

页数：5

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