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

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.

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

Journal of Optical Communications ◽

10.1515/joc-2018-0152 ◽

2018 ◽

Vol 0 (0) ◽

Cited By ~ 1

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.

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Extremely Low Loss of Photonic Crystal Fiber for Terahertz Wave Propagation in Optical Communication Applications

Journal of Optical Communications ◽

10.1515/joc-2018-0009 ◽

2020 ◽

Vol 41 (4) ◽

pp. 393-401 ◽

Cited By ~ 9

Author(s):

Fahad Ahmed ◽

Subrata Roy ◽

Bikash Kumar Paul ◽

Kawsar Ahmed ◽

Ali Newaz Bahar

Keyword(s):

Wave Propagation ◽

Photonic Crystal ◽

Photonic Crystal Fiber ◽

Fem Simulation ◽

Effective Area ◽

Low Loss ◽

Material Loss ◽

Scattering Loss ◽

Thz Wave ◽

Crystal Fiber

AbstractAn enormously low loss symmetrical hybrid decagonal porous core spiral photonic crystal fiber (SH-PCF) has been proposed for terahertz (THz) wave guiding. The modal characteristics of the fiber and its mathematical analysis have been numerically completed using a full-vector finite element method (FEM). Simulation results show an ultra-low material loss of 0.0167 cm−1 and large effective area 1.95×106 µm2 which is 91.6 % of bulk absorption material loss at controlling frequency f=1.0 THz with a core porosity 42 %. Additionally, proposed structure establishes the comparatively higher core power fraction maintaining lower scattering loss about 1.8×10−15 dB/cm at the same operating frequency. It promises the aforementioned advantages for efficient THz wave propagation.

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DESIGN OF HEXAGONAL PHOTONIC CRYSTAL FIBER WITH ULTRA-HIGH BIREFRINGENT AND LARGE NEGATIVE DISPERSION COEFFICIENT FOR THE APPLICATION OF BROADBAND FIBER

International Journal of Engineering Science Technologies ◽

10.29121/ijoest.v2.i1.2017.02 ◽

2019 ◽

Vol 2 (1) ◽

pp. 9-16

Author(s):

Shovasis Kumar Biswas

Keyword(s):

Photonic Crystal ◽

Photonic Crystal Fiber ◽

Dispersion Coefficient ◽

Nonlinear Coefficient ◽

Simulation Software ◽

Confinement Loss ◽

High Birefringence ◽

Crystal Fiber ◽

Negative Dispersion ◽

Operating Wavelength

The purpose of this paper is to design a hexagonal microstructure photonic crystal fiber (PCF) which gives ultra-high birefringence and very low confinement loss for sensing application. To characterize the modal properties of the proposed photonic crystal fiber, finite element method is used. We found ultra-high birefringence of 3.34×10-2 at operating wavelength 1550nm by using simulation software comsol multiphysics. Our proposed PCF gives large value of nonlinear coefficient of 63.51 W-1km-1, large value of negative dispersion coefficient of -566.6 ps/ (nm.km), and also ultra-low confinement loss which is in the order of 10-7.

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Design and Analysis of the Effect of Zeonex Based Octagonal Photonic Crystal Fiber for Different Types of Communication Applications

10.21203/rs.3.rs-462789/v1 ◽

2021 ◽

Author(s):

Selim Hossain ◽

M. M. Kamruzzaman ◽

Shuvo Sen ◽

Mir Mohammad Azad

Keyword(s):

Photonic Crystal ◽

Photonic Crystal Fiber ◽

Research Work ◽

Confinement Loss ◽

Perfectly Matched Layers ◽

Terahertz Waves ◽

Material Loss ◽

Scattering Loss ◽

Crystal Fiber ◽

Different Types

Abstract In this present work, a novel structure of octagonal cladding with two elliptical air holes based on photonic crystal fiber (O-PCF) has been presented for the application of different types of communication areas within the terahertz (THz) wave propagation. There are five layers of octagonal design shape of circular air holes (CAH) in cladding region with elliptical design shape of two air holes in core area has been reported in this research work. This O-PCF fiber has been investigated by the perfectly matched layers (PML) with the finite element method (FEM). After the simulation process, our proposed O-PCF fiber shows a low effective material loss (EML) of 0.0162 cm −1 , the larger effective area of 5.88×10-8 m2, the core power fraction (PF) of 80%, the scattering loss of 1.22×10 -10 dB/km, and the confinement loss of 3.33×10 -14 dB/m at the controlling region of 1 terahertz (THz). Due to its excellent characteristics, this proposed O-PCF fiber gives proficient transmission of broadband terahertz waves of signals. Moreover, for different kinds of optical communication applications and biomedical signals, our suggested O-PCF fiber will be highly perfect in the terahertz (THz) regions.

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

10.21203/rs.3.rs-487498/v1 ◽

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.

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

Journal of Optical Communications ◽

10.1515/joc-2018-0206 ◽

2018 ◽

Vol 0 (0) ◽

Cited By ~ 4

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.

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

10.21203/rs.3.rs-845789/v1 ◽

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.

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