Design and Characterization of Porous Core Polarization Maintaining Photonic Crystal Fiber for THz Guidance

Aming, Asmar; Uthman, M.; Chitaree, Ratchapak; Mohammed, Waleed S.; Rahman, B. M. A.

doi:10.1109/jlt.2016.2623657

Cited by 22 publications

(8 citation statements)

References 39 publications

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“…There are basically two main types of PM PCFs, i.e., highly birefringent (HB) PCFs and single-polarization-single-mode (SPSM) PCFs. To date, a variety of HB PCFs with birefringence values ranging from 0.001 to 0.1 have been proposed and studied both theoretically and experimentally [2,3,4,5,6,7]. On the other hand, there have been many fewer studies on SPSM PCFs, especially in the terahertz (THz) frequency regime.…”

Section: Introductionmentioning

confidence: 99%

A Terahertz (THz) Single-Polarization-Single-Mode (SPSM) Photonic Crystal Fiber (PCF)

et al. 2019

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This paper presents a novel approach to attain a single-polarization-single-mode (SPSM) photonic crystal fiber (PCF) in the terahertz (THz) regime. An initial circular hole PCF design is modified by introducing asymmetry in the first ring of six air holes in the cladding, i.e., epsilon-near-zero (ENZ) material is introduced into only four of those air holes and the other two remain air-filled but have different diameters. The resulting fundamental X-polarized (XP) and Y-polarized (YP) modes have distinctly different electric field distributions. The asymmetry is arranged so that the YP mode has a much larger amount of the field distributed in the ENZ material than the XP mode. Since the ENZ material is very lossy, the YP mode suffers a much higher loss than the XP mode. Consequently, after a short propagation distance, the loss difference (LD) between the XP and YP modes will be large enough that only the XP mode still realistically exists in the PCF. To further enhance the outcome, gain material is introduced into the core area to increase the LDs between the wanted XP mode and any unwanted higher order (HO) modes, as well as to compensate for the XP mode loss without affecting the LD between the XP and YP modes. The optimized PCF exhibits LDs between the desired XP mode and all other modes greater than 8.0 dB/cm across a wide frequency range of 0.312 THz. Consequently, the reported PCF only needs a length of 2.5 cm to attain an SPSM result, with the unwanted modes being more than 20 dB smaller than the wanted mode over the entire operational band.

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Section: Introductionmentioning

confidence: 99%

A Terahertz (THz) Single-Polarization-Single-Mode (SPSM) Photonic Crystal Fiber (PCF)

et al. 2019

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“…Now-a-Days for THz applications Photonic Crystal Fibers (PCF) has been widely used [1,2]. Due to the functioning advantages like structural flexibility, tunability of dispersion, low loss of Photonic Crystal Fibers has been positioned in optical regime [3].…”

Section: Introductionmentioning

confidence: 99%

Epsilon Near Zero (ENZ) Based Kagome Photonic Crystal Fiber for Low Loss, High Birefringence and Near Zero Flat Dispersion in THz Regime

Asaduzzaman¹,

Rehana²,

Aziz³

et al. 2021

Preprint

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In this research, we have proposed two novel types of Kagome PCFs one is slotted core PCF (S-KPCF) and another one is circular PCF (C-KPCF). FEM has been applied with boundary condition to investigate the optical properties of Proposed PCFs. HRS material along with Epsilon Near Zero (ENZ) material has been applied in core and TOPAS was used as background material. Numerical investigation takes place a wider frequency range for 0.8 THz to 2 THz. Slotted core PCF (S-KPCF) shows eminent birefringence of 2.98×10− 2, Lower EML of 0.232 cm− 1, lower confinement loss of 2.76×10− 8, Bending loss 10.76×10− 9, Total loss of 0.232cm− 1 at frequency 1THz. Besides circular core PCF (C-KPCF) shows eminent birefringence of 8.69×10− 2, Lower effective material loss of 0.746 cm− 1, lower confinement loss of 2.80×10− 7, Bending loss 7.76×10− 9, Total loss of 0.746cm− 1 at 1THz. Both PCFs show flat dispersion near zero (for S-KPCF is -0.997ps/nm/Km and for C-KPCF is -0.797ps/nm/Km) range. V-Parameter of both of the PCF indicates that both PCF is multimode PCF. Comparison of the proposed PCFs shows that C-KPCF shows better results than S-KPCF and both PCFs shows better results than previous PCFs.

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“…Various THz waveguides have been recently reported, including polymer fibers [11][12][13][14][15][16][17], metal tube waveguides [18], metal wire waveguides [19], and so on. The polymer fibers can achieve low loss and good flexibility.…”

Section: Introductionmentioning

confidence: 99%

Tunable Temperature Characteristic of Terahertz Bragg Fiber Filled with Liquid Water

Guo

Shi

et al. 2021

Applied Sciences

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Hollow-core terahertz (THz) fibers have attracted a lot of research interest due to the low loss and easy inner modification with functional materials. Liquid water has unique properties in the THz region and has been widely investigated in THz emission, sensing, and devices. In this paper, a hollow-core THz Bragg fiber with a water defect layer is proposed. The finite element method is used to verify and analyze the tunable temperature characteristic of the water-filled THz fiber. The numerical analysis results show that the confinement loss and the low-frequency side of the dip near 0.5 THz can be controlled by the temperature of the liquid water. The temperature sensitivity of the THz fiber is obtained at 0.09614 dB·m−1/K at 0.45 THz with a high core power fraction up to 98%. The proposed THz fiber has potential applications in THz interaction with liquid and THz tunable devices.

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Design and Characterization of Porous Core Polarization Maintaining Photonic Crystal Fiber for THz Guidance

Cited by 22 publications

References 39 publications

A Terahertz (THz) Single-Polarization-Single-Mode (SPSM) Photonic Crystal Fiber (PCF)

A Terahertz (THz) Single-Polarization-Single-Mode (SPSM) Photonic Crystal Fiber (PCF)

Epsilon Near Zero (ENZ) Based Kagome Photonic Crystal Fiber for Low Loss, High Birefringence and Near Zero Flat Dispersion in THz Regime

Tunable Temperature Characteristic of Terahertz Bragg Fiber Filled with Liquid Water

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