Improved Numerical Calculation of the Single-Mode-No-Core-Single-Mode Fiber Structure Using the Fields Far from Cutoff Approximation

Multimode interferometers based on the single-mode-no-core-single-mode fiber (SNCS) structure have been widely investigated as functional devices and sensors. However, the theoretical support for the sensing mechanism is still imperfect, especially for the cladding refractive index response. In this...

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Published inSensors (Basel, Switzerland) Vol. 17; no. 10; p. 2240
Main Authors Xu, Wei, Shi, Jia, Yang, Xianchao, Xu, Degang, Rong, Feng, Zhao, Junfa, Yao, Jianquan
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 29.09.2017
MDPI
Subjects
Approximation
Cladding
Efficiency
guided-mode propagation analysis
Interferometers
Investigations
Laboratories
numerical calculation
Propagation
Propagation modes
Refractivity
Self image
Sensors
single-mode-no-core-single-mode fiber
transmission spectra
guided-mode propagation analysis
numerical calculation
single-mode-no-core-single-mode fiber
transmission spectra
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Summary:Multimode interferometers based on the single-mode-no-core-single-mode fiber (SNCS) structure have been widely investigated as functional devices and sensors. However, the theoretical support for the sensing mechanism is still imperfect, especially for the cladding refractive index response. In this paper, a modified model of no-core fiber (NCF) based on far from cut-off approximation is proposed to investigate the spectrum characteristic and sensing mechanism of the SNCS structure. Guided-mode propagation analysis (MPA) is used to analyze the self-image effect and spectrum response to the cladding refractive index and temperature. Verified by experiments, the performance of the SNCS structure can be estimated specifically and easily by the proposed method.
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These authors contributed equally to this work.
ISSN:1424-8220
1424-8220
DOI:10.3390/s17102240