Refractive index sensor based on evanescent field effects in hollow core PCF for detection of analytes over extended E+S+C+L+U communication bands

•This work presents a new kind of asymmetric photonic crystal fiber.•The birefringence and effective area of fiber have been utilized for sensing.•This fiber shows better performance in dispersion compensation. We present an innovative platform for photonic crystal fiber (PCF) based refractive index...

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Bibliographic Details
Published in:Optics and laser technology 2020-01, Vol.121, p.105779, Article 105779
Main Authors: Dixit, A., Tiwari, S., Ramani, U., Pandey, P.C.
Format: Article
Language:English
Subjects:
Analyte
Birefringence
Boron
Communication
Crystal fibers
Dielectric strength
Dispersion
Elliptical plasmas
Evanescent field sensing
Photonic crystals
Refractivity
Rods
Silicon
Silicon dioxide
Single mode PCF
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Summary:•This work presents a new kind of asymmetric photonic crystal fiber.•The birefringence and effective area of fiber have been utilized for sensing.•This fiber shows better performance in dispersion compensation. We present an innovative platform for photonic crystal fiber (PCF) based refractive index (RI) sensor for the detection of analytes. Our PCF operating on the principle of a single mode is spliced with multi-mode fiber on both sides. This PCF contains an empty core, surrounded by elliptical plasma dielectric rods suspended in solid microstructured cladding for different pump signals over the extended range of E + S + C + L + U communication bands. The empty core of this photonic device is injected with analytes leading to generation of an evanescent field. The doping of boron is subjected to significantly diminish the upgraded refractive index of silica which ingresses special capabilities that endow an outstanding potential to PCF for the profoundly intense pulse laser. We present structure with over the extended E-band (1360-1460 nm) ultra-flat anomalous dispersion below −50 ps/nm/km and over the ultra-long U-band (1625–1675 nm) flat near zero anomalous dispersion with high birefringence dedicated to sensing application over the entire communication band. Our designed PCF shows better performance for both high contribution and asymmetric shape of plasma dielectric rods and is strongly sensitive to the refractive index of analytes injected in the core of the PCF.
ISSN:0030-3992
1879-2545
DOI:10.1016/j.optlastec.2019.105779