Mode coupling and output beam quality of 100-400 μm core silica fibers

被引：35

作者：

Hurand, Simon ^{[2
]}

Chauny, Lucam-A. ^{[2
]}

El-Rabii, Hazem ^{[3
]}

Joshi, Sachin ^{[1
]}

Yalin, Azer P. ^{[1
]}

机构：

[1] Colorado State Univ, Dept Mech Engn, Ft Collins, CO 80523 USA

[2] Ecole Cent Paris, F-92290 Chatenay Malabry, Paris, France

[3] Univ Poitiers, ENSMA, CNRS, Inst Pprime, F-86961 Futuroscope, France

来源：

APPLIED OPTICS | 2011年 / 50卷 / 04期

基金：

美国能源部;

关键词：

LASER-INDUCED BREAKDOWN; INDEX OPTICAL-FIBERS; MULTIMODE FIBER; FUNDAMENTAL MODE; ENGINE IGNITION; SENSOR SYSTEMS; SPARK-IGNITION; POWER-FLOW; PROPAGATION; GASES;

D O I：

10.1364/AO.50.000492

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Propagation and mode coupling within relatively short (similar to 1-10 m) large core, nominally multimode, fibers are of interest in a number of applications. In this research, we have studied the output beam quality and mode coupling in various fibers with core diameters of 100-400 mu m and lengths of 2m. Output beam quality (M-2) and mode-coupling coefficients (D) have been studied for different clad dimensions, numerical apertures, and wavelengths. The mode-coupling coefficients have been determined based on modal power diffusion considerations. The results show that D scales approximately as the inverse square of the clad dimension and inverse square root of the wavelength. Output from a 2m length fiber of 100 mu m core and 660 eta m clad fiber is close to single mode (M-2 - 1.6), while output from a 200 mu m core and 745 mu m clad fiber also has high beam quality. (C) 2011 Optical Society of America

引用

页码：492 / 499

页数：8

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