Skew modes in specialty fibers with step-index profile

被引：2
|
作者：
Klein, Karl-Friedrich [1 ]
Gonschior, Cornell [1 ,4 ]
Xia, Ruan [2 ]
Hillrichs, Georg [2 ]
Bloos, Martin [3 ]
Poisel, Hans [3 ]
机构：
[1] Univ Appl Sci Giessen Friedberg, W Leuschner Str 13, D-61169 Friedberg, Germany
[2] Univ Appl Sci Merseburg, D-61169 Merseburg, Germany
[3] Univ Appl Sci Neurnberg, D-90489 Nurnberg, Germany
[4] City Univ London, London EC1V 0HB, England
来源：
OPTICAL FIBERS AND SENSORS FOR MEDICAL DIAGNOSTICS AND TREATMENT APPLICATIONS X | 2010年 / 7559卷
关键词：
step-index fibers; multimode fibers; light guidance; fiber-optic systems; selective methods; additional losses; PROPAGATION;
D O I：
10.1117/12.847046
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In step-index multimode-fibers, controlled excitation conditions are essential to achieve optimized transmission properties and control the output beam profile. Especially with lasers as a light-source, selective methods of mode excitation can be used easily. So far, fiber properties have been specified using meridional rays (modes), as proposed with the inverse far-field method. In addition to these meridional rays in step-index fibers, high-order skew rays can be selectively excited. Especially with excitation angles higher than the numerical aperture of the fiber, these skew rays can propagate with interesting properties. Based on these extreme test conditions, the core-cladding interface of large-core step-index fibers can be more efficiently controlled.
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页数：10
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