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.

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.

High birefringent, low loss and flattened dispersion asymmetric slotted core-based photonic crystal fiber in THz regime

2019 ◽  
Vol 33 (20) ◽  
pp. 1950218 ◽  
Author(s):  
Md. Khairum Monir ◽  
Mahmudul Hasan ◽  
Bikash Kumar Paul ◽  
Kawsar Ahmed ◽  
Hala J. El-Khozondar ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Real Life ◽  
Simulation Software ◽  
Confinement Loss ◽  
Low Loss ◽  
Material Loss ◽  
Scattering Loss ◽  
High Birefringence ◽  
Crystal Fiber

This paper proposes a novel model to attain high birefringence and low loss in a slotted core-based photonic crystal fiber (PCF) structure in THz regime. The performance of the proposed PCF has been evaluated by applying finite element method (FEM) with full simulation software COMSOL Multiphysics V-5.1. The proposed model gains good optical properties such as high birefringence of 0.24, low effective material loss (EML) of 0.03 cm[Formula: see text], low confinement loss of 6.5 × 10[Formula: see text] (dB/m), low scattering loss of 2 × 10[Formula: see text] (dB/m) and low bending loss of 7.4 × 10[Formula: see text] (dB/cm). The proposed structure also exhibits the flattened dispersion for wider frequency response. However, the real-life fabrication of the suggested model is highly feasible using the current technology due to the unique shape of circular air holes in the cladding region. The outcomes make the proposed PCF a stronger candidate for polarization-preserving applications such as sensing, communications and filtering operations in THz band.

Ultra-low Loss with Single Mode Polymer-Based Photonic Crystal Fiber for THz Waveguide

2019 ◽  
Vol 40 (4) ◽  
pp. 411-417 ◽  
Author(s):  
Shuvo Sen ◽  
Md. Shadidul Islam ◽  
Bikash Kumar Paul ◽  
Md. Ibadul Islam ◽  
Sawrab Chowdhury ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Single Mode ◽  
Effective Area ◽  
Low Loss ◽  
Long Distance ◽  
Material Loss ◽  
Crystal Fiber ◽  
The Core ◽  
Power Fraction

Abstract In this article, a low loss circular photonic crystal fiber (C-PCF) has been suggested as Terahertz (THz) waveguide. Both the core and cladding vicinity of the suggested PCF are constituted by circular-shaped air holes. The optical properties such as effective material loss, effective area, core power fraction and V-parameter have numerically been probed by utilizing full vectorial finite element method (FEM) with perfectly matched layers (FMLs) boundary condition. The reported PCF reveals low absorption loss and large effective area of 0.04 cm−1 and 2.80×10−07 m2 respectively at 1 THz operating frequency. In addition, the core power fraction of the fiber is about 50.83 % at the same activation frequency. The V-parameter shows that the proposed PCF acts as a single mode over 0.70 to 1.15 THz frequency. So, the reported PCF offers the best performance in long distance communication applications.

Simulation and analysis of ultra-low material loss of single-mode photonic crystal fiber in terahertz (THz) spectrum for communication applications

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Md. Selim Hossain ◽  
Md. Mahedi Hasan ◽  
Shuvo Sen ◽  
Md. Sarwar Hossain Mollah ◽  
Mir Mohammad Azad
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Broad Band ◽  
Single Mode ◽  
Confinement Loss ◽  
Perfectly Matched Layers ◽  
Material Loss ◽  
Circular Shape ◽  
Crystal Fiber ◽  
Elliptical Shape

Abstract This analysis represents a circular shape based cladding with two elliptical shape cores in photonic crystal fiber (PCF) for the terahertz (THz) range. Here, we present a single-mode photonic crystal fiber (SM-PCF) with five layers of circular shape of air holes (CAH) structure along with two layers of elliptical shape of air holes (EAH) core configuration in the center to decrease the different types of losses. For broad-band communications, our proposed SM-PCF is highly useful due to the obtaining of ultra-low effective material loss (UML) in the terahertz regime. Perfectly matched layers (PMLs) and finite element method (FEM) established on COMSOL Multiphysics software has been used to design this PCF fiber. Simulated outcomes show a particularly an UML deficit of 0.014 cm−1, power fraction in the core area (CA) and large effective area (EA) of 72%, and 5.90 × 10−8 m2 respectively at 1 terahertz (THz) frequency. Also, other aspects of optical fiber for THz signal banquet with confinement loss (CL), scattering loss (SL) and V-parameter have been calculated here. Moreover, our proposed SM-PCF shows single-mode propagation by V-parameter pointer over 0.80–3 THz frequency. So, we can say that our designed PCF fiber will be suitable for various effective communication areas at the terahertz (THz) spectrum.

scholarly journals Low Effective Material Loss TOPAS Based Single-Mode Photonic Crystal Fiber with High Core Power Fraction in the THz Waveguiding

2021 ◽  
Author(s):  
Selim Hossain ◽  
Shuvo Sen
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Single Mode ◽  
Effective Area ◽  
Confinement Loss ◽  
Long Distance ◽  
Material Loss ◽  
Scattering Loss ◽  
Crystal Fiber ◽  
Different Types

Abstract In this study, five layers of hexagonal cladding and two elliptical air holes based on photonic crystal fiber are discussed highly for many communication areas by decreasing different types of losses such as effective material loss (EML), scattering loss, and confinement loss in the terahertz (THz) waveguiding. Our suggested fiber (H-PCF) and all simulation results are obtained with the finite element method (FEM) and the perfectly matched layer (PML) boundary conditions based COMSOL Multiphysics software have been used to design in the THz region. After investigating all the graphical results, this optical communication-related H-PCF fiber discloses an extremely low effective material loss (EML) of 0.0184 cm−1, with an effective area of 7.07×10-8 m2 and flow of power in the core region of 88% at 1 terahertz (THz). Here, other simulation parameters such as confinement loss, scattering loss, and V-parameter are also presented with a proper graph. So, we can easily say that the reported H-PCF fiber is strongly appropriate for different types of short and long-distance communication applications in the terahertz (THz) wave pulse region.

scholarly journals Efficient Photonic Crystal Fiber Design for Higher OAM Modes with Low Loss Towards Next Generation THz Communication

2021 ◽  
Author(s):  
Bibhatsu Kuiri ◽  
Bubai Dutta ◽  
Nilanjana Sarkar ◽  
Saikat Santra ◽  
Paulomi Mandal ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Confinement Loss ◽  
Solid Core ◽  
Low Loss ◽  
Crystal Fiber ◽  
Fiber Design ◽  
Effective Mode Area ◽  
Mode Purity ◽  
Mode Area

Abstract A newer and efficient solid core with air holes and ring based circular photonic crystal fiber (C-PCF) design is proposed, developed, and studied. The C-PCF structure with a ring core and three layers of air holes is developed to communicate terahertz frequency of the range of 1 THz to 3 THz. Finite element method (FEM) is used to optimize the position, shape and dimensions of air holes and refractive index (RI) of material for the proposed PCF design and check the efficiency to support different orbital angular momentum (OAM) modes for communication. Our novel designed C-PCF supports multiple stable modes with mode purity above 0.9. Confinement loss is in the range of 10-12 dB/cm, highest effective mode area in the order of 1 mm2 is achieved in the investigated study for 3 THz transmission. The study observes that the performance of PCF is strongly dependent on RI of core and cladding.

scholarly journals Pressure-assisted low-loss fusion splicing between photonic crystal fiber and single-mode fiber

2012 ◽  
Vol 20 (22) ◽  
pp. 24465 ◽  
Author(s):  
Tao Zhu ◽  
Fufeng Xiao ◽  
Laicai Xu ◽  
Min Liu ◽  
Ming Deng ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Low Loss ◽  
Crystal Fiber

Low Loss Fusion Splicing of Germanium Doped Core Photonic Crystal Fiber and Standard Single Mode Fiber

2010 ◽  
Vol 37 (6) ◽  
pp. 1589-1593
Author(s):  
李宏雷 Li Honglei ◽  
娄淑琴 Lou Shuqin ◽  
郭铁英 Guo Tieying ◽  
王立文 Wang Liwen ◽  
陈卫国 Chen Weiguo ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Low Loss ◽  
Crystal Fiber

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.

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