Core-cladding mode coupling and recoupling in photonic crystal fiber for enhanced overlap of evanescent field using long-period gratings

被引：12
|
作者：
He, Zonghu [1 ]
Zhu, Yinian [1 ]
Kanka, Jiri [2 ]
Du, Henry [1 ]
机构：
[1] Stevens Inst Technol, Dept Chem Engn & Mat Sci, Hoboken, NJ 07030 USA
[2] Inst Photon & Elect AS CR, Prague 18251, Czech Republic
来源：
OPTICS EXPRESS | 2010年 / 18卷 / 02期
基金：
美国国家科学基金会;
关键词：
MICROSTRUCTURED OPTICAL-FIBERS; SENSORS; SPECTRA;
D O I：
10.1364/OE.18.000507
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Excitation of cladding modes has been achieved using long-period (LPGs) inscribed in an endlessly single-mode photonic crystal fiber (ESM PCF) by CO2 laser irradiation. Core-cladding mode coupling and recoupling has resulted in marked improvement in the evanescent field overlap throughout the cladding air channels in the PCF-LPG, compared to the PCF alone. Our numerical simulation has shown that design optimization of the PCF-LPG configuration can lead to a field power overlap as high as 22% with a confinement loss of less than 1 dB/m in the cladding mode. (C) 2010 Optical Society of America
引用
收藏
页码：507 / 512
页数：6
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