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

Zonghu He; Yinian Zhu; Jiří Kaňka; Dennis J. Trevor; Henry Du

doi:10.1117/12.851732

20 April 2010 Mode coupling in photonic crystal fiber using long-period gratings for enhanced overlap of evanescent field

Zonghu He, Yinian Zhu, Jiří Kaňka, Dennis J. Trevor, Henry Du

Author Affiliations +

Proceedings Volume 7677, Fiber Optic Sensors and Applications VII; 767711 (2010) https://doi.org/10.1117/12.851732
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

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.

Citation Download Citation

Zonghu He, Yinian Zhu, Jiří Kaňka, Dennis J. Trevor, and Henry Du "Mode coupling in photonic crystal fiber using long-period gratings for enhanced overlap of evanescent field", Proc. SPIE 7677, Fiber Optic Sensors and Applications VII, 767711 (20 April 2010); https://doi.org/10.1117/12.851732

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