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Proceedings Paper

Mode coupling in photonic crystal fiber using long-period gratings for enhanced overlap of evanescent field
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Paper Abstract

An evanescent field sensing platform is being pursued through excitation of cladding modes 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 significant 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 23% with a confinement loss of less than 1 dB/m in the cladding mode.

Paper Details

Date Published: 20 April 2010
PDF: 7 pages
Proc. SPIE 7677, Fiber Optic Sensors and Applications VII, 767711 (20 April 2010); doi: 10.1117/12.851732
Show Author Affiliations
Zonghu He, Stevens Institute of Technology (United States)
Yinian Zhu, Northwestern Univ. (United States)
Jiří Kaňka, Institute of Photonics and Electronics (Czech Republic)
Dennis J. Trevor, OFS Labs. (United States)
Henry Du, Stevens Institute of Technology (United States)

Published in SPIE Proceedings Vol. 7677:
Fiber Optic Sensors and Applications VII
Alexis Mendez; Henry H. Du; Anbo Wang; Eric Udd; Stephen J. Mihailov, Editor(s)

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