Design of a Polymer-Based Hollow-Core Bandgap Fiber for Low-Loss Terahertz Transmission

Ajanta Barh, Ravi K. Varshney, Bishnu P. Pal, G. P. Agrawal, B. M. A. Rahman

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We use numerical simulations to design a hollow-core microstructured polymer optical fiber (HC-mPOF) suitable for broadband, terahertz (THz) pulse transmission with relatively low losses and small dispersion. The HC-mPOF consists of a central large air-core surrounded by periodically arranged wavelength-scale circular air holes in a hexagonal pattern, embedded in a uniform Teflon matrix. The THz guidance in this fiber is achieved by exploiting the photonic bandgap (PBG) effect. In our low index contrast Teflon-air (1.44:1) hexagonal periodic lattice, the PBG appears only for a certain range of non-zero values of the longitudinal wavevector. We have achieved PBG over a broad spectral range (bandwidth similar to 400 GHz) ranging from 1.65 to 2.05 THz in the proposed HC-mPOF. The achievable loss coefficient in our designed HC-mPOF is
Original languageEnglish
JournalI E E E Photonics Technology Letters
Issue number15
Pages (from-to)1703-1706
Publication statusPublished - 2016


  • THZ
  • Microstructured fiber
  • photonic band-gap
  • polymer fiber
  • terahertz wave
  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Bandwidth
  • Dispersion (waves)
  • Energy gap
  • Fibers
  • Group velocity dispersion
  • Microstructure
  • Optical fibers
  • Photonic band gap
  • Photonic bandgap fibers
  • Plastic optical fibers
  • Polymers
  • Polytetrafluoroethylenes
  • Circular air-holes
  • Low index contrast
  • Microstructured fibers
  • Microstructured polymer optical fibers
  • Periodic lattices
  • Photonic bandgap (PBG)
  • Polymer fiber
  • Terahertz transmission
  • Terahertz waves
  • polymer fibres
  • holey fibres
  • numerical analysis
  • optical design techniques
  • optical fibre dispersion
  • optical fibre losses
  • optical polymers
  • photonic band gap
  • photonic crystals
  • bandwidth 300 GHz
  • polymer-based hollow-core bandgap fiber design
  • low-loss terahertz transmission
  • numerical simulations
  • hollowcore microstructured polymer optical fiber
  • HC-mPOF
  • central large air-core
  • periodically arranged wavelength-scale circular air holes
  • PBG
  • longitudinal wavevector
  • loss coefficient
  • group velocity dispersion
  • Optical fiber dispersion
  • Optical losses
  • Propagation losses
  • Other fibre optical devices and techniques
  • Optical system design
  • Photonic bandgap materials
  • Optical polymers and other organic optical materials
  • Numerical approximation and analysis
  • Nonlinear optics
  • Optical propagation, dispersion and attenuation in fibres
  • Fibre optics
  • Nonlinear optics and devices
  • Optical materials
  • Numerical analysis


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