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

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

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.

Original languageEnglish
Title of host publicationFiber Optic Sensors and Applications VII
DOIs
StatePublished - 2010
EventFiber Optic Sensors and Applications VII - Orlando, FL, United States
Duration: 7 Apr 20108 Apr 2010

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7677
ISSN (Print)0277-786X

Conference

ConferenceFiber Optic Sensors and Applications VII
Country/TerritoryUnited States
CityOrlando, FL
Period7/04/108/04/10

Keywords

  • Evanescent field
  • Fiber Bragg gratings
  • Fiber design
  • Long-period gratings
  • Microstructured optical fibers
  • Photonic crystal fibers

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