scholarly journals Low material loss and dispersion flattened fiber for single mode THz-wave transmission applications

2018 ◽  
Vol 11 ◽  
pp. 638-642 ◽  
Author(s):  
Bikash Kumar Paul ◽  
Md. Shadidul Islam ◽  
Shuvo Sen ◽  
Kawsar Ahmed ◽  
Muhammad Shahin Uddin
Keyword(s):  
Single Mode ◽  
Wave Transmission ◽  
Material Loss ◽  
Thz Wave

Theoretical Assessment of a Porous Core Photonic Crystal Fiber for Terahertz Wave Propagation

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Izaddeen Kabir Yakasai ◽  
Atta Rahman ◽  
Pg Emeroylariffion Abas ◽  
Feroza Begum
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Bulk Material ◽  
Single Mode ◽  
Confinement Loss ◽  
Design Parameters ◽  
Terahertz Waves ◽  
Material Loss ◽  
Crystal Fiber ◽  
Porous Core

AbstractA porous core photonic crystal fiber (PCF) for transmitting terahertz waves is reported and characterized using finite element method. It is shown that by enveloping an octagonal core consisting of only circular air holes in a hexagonal cladding, it is possible to attain low effective material loss that is 73.8% lower than the bulk material absorption loss at 1.0 THz operating frequency. Moreover, a low confinement loss of 7.53×10–5 cm−1 and dispersion profile of 1.0823±0.06 ps/THz/cm within 0.7–1 THz are obtained using carefully selected geometrical design parameters. Other guiding properties such as single-mode operation, bending loss, and effective area are also investigated. The structural design of this porous core PCF is comparatively simple since it contains noncomplex lattices and circular shaped air holes; and therefore, may be implemented using existing fabrication techniques. Due to its auspicious guiding properties, the proposed fiber may be used in single mode terahertz imaging and other short distance terahertz applications.

Design and Characterization of an Ultra Low Loss, Dispersion-Flattened Slotted Photonic Crystal Fiber for Terahertz Application

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Mohammad Rakibul Islam ◽  
Md. Arif Hossain ◽  
Syed Iftekhar Ali ◽  
Jakeya Sultana ◽  
Md. Saiful Islam
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Single Mode ◽  
Confinement Loss ◽  
Terahertz Frequency ◽  
Frequency Range ◽  
Low Loss ◽  
Material Loss ◽  
Crystal Fiber

AbstractA novel photonic crystal fiber (PCF) based on TOPAS, consisting only rectangular slots is presented and analyzed in this paper. The PCF promises not only an extremely low effective material loss (EML) but also a flattened dispersion over a broad frequency range. The modal characteristics of the proposed fiber have been thoroughly investigated using finite element method. The fiber confirms a low EML of 0.009 to 0.01 cm−1 in the frequency range of 0.77–1.05 THz and a flattened dispersion of 0.22±0.01 ps/THz/cm. Besides, some other significant characteristics like birefringence, single mode operation and confinement loss have also been inspected. The simplicity of the fiber makes it easily realizable using the existing fabrication technologies. Thus it is anticipated that the new fiber has the potential to ensure polarization preserving transmission of terahertz signals and to serve as an efficient medium in the terahertz frequency range.

scholarly journals A Novel Hexahedron Photonic Crystal Fiber in Terahertz Propagation: Design and Analysis

Photonics ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 32 ◽  
Author(s):  
Bikash Paul ◽  
Md. Haque ◽  
Kawsar Ahmed ◽  
Shuvo Sen
Keyword(s):  
Finite Element Method ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Numerical Aperture ◽  
Single Mode ◽  
Material Loss ◽  
Crystal Fiber ◽  
Optimum Parameters ◽  
Bulk Absorption ◽  
Power Fraction

A novel hexahedron fiber has been proposed for biomedical imaging applications and efficient guiding of terahertz radiation. A finite element method (FEM) has been applied to investigate the guiding properties rigorously. All numerically computational investigated results for optimum parameters have revealed the high numerical aperture (NA) of 0.52, high core power fraction of 64%, near zero flattened dispersion of 0.5 ± 0.6 ps/THz/cm over the 0.8–1.4 THz band and low losses with 80% of the bulk absorption material loss. In addition, the V–parameter is also inspected for checking the proposed fiber modality. The proposed single-mode hexahedron photonic crystal fiber (PCF) can be highly applicable for convenient broadband transmission and numerous applications in THz technology.

Extremely low material loss and dispersion flattened TOPAS based circular porous fiber for long distance terahertz wave transmission

2017 ◽  
Vol 34 ◽  
pp. 6-11 ◽  
Author(s):  
Md. Saiful Islam ◽  
Jakeya Sultana ◽  
Sohel Rana ◽  
Mohammad Rakibul Islam ◽  
Mohammad Faisal ◽  
...  
Keyword(s):  
Terahertz Wave ◽  
Wave Transmission ◽  
Porous Fiber ◽  
Long Distance ◽  
Material Loss
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