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

Barh, A., Varshney, R. K., Pal, B. P. , Agrawal, G. P. & Rahman, B. M. (2016). Design of a Polymer-Based Hollow-Core Bandgap Fiber for Low-Loss Terahertz Transmission. IEEE Photonics Technology Letters, 28(15), pp. 1703-1706. doi: 10.1109/LPT.2016.2544198


We use numerical simulations to design a hollowcore 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 ~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 <;4 m-1 and the group velocity dispersion parameter is <;±5 ps/THz·cm over a 300-GHz bandwidth (1.65~1.95 THz).

Publication Type: Article
Additional Information: © 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Publisher Keywords: terahertz wave, Microstructured fiber, photonic band-gap, polymer fiber, Optical fiber dispersion, Optical fibers, Optical losses, Polymers, Propagation losses, Photonic band gap
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: School of Science & Technology > Engineering
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