COMPARATIVE ANALYSIS OF CONFINEMENT LOSS AND DISPERSION FOR HEXAGONAL PHOTONIC CRYSTAL FIBER STRUCTURE DOPED WITH SPECIFIC LIQUIDS

2018 ◽  
Vol 6 (4) ◽  
pp. 10 ◽  
Author(s):  
GOPAL PANDA SAKHI ◽  
SAHU VIKAS ◽  
JOSHI AKASH ◽  
◽  
◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Confinement Loss ◽  
Fiber Structure ◽  
Crystal Fiber

scholarly journals Defect-Photonic Crystal Fiber structure of Zero Chromatic Dispersion and very low Confinement loss

2021 ◽  
Vol 6 (2) ◽  
pp. 98-105
Author(s):  
Paul Antwi ◽  
Patrick Atsu Agbemabiese ◽  
Jay Denton Agamah ◽  
Jacob Ayehquaye Nartey ◽  
Moses K. Torkudzor
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Chromatic Dispersion ◽  
Ring Structure ◽  
Confinement Loss ◽  
Fiber Structure ◽  
Crystal Fiber ◽  
The Third ◽  
Design Flexibility ◽  
Crystal Fibers

Photonic crystal fibers are being designed with promising results owing to design flexibility and structure geometry. A four-ring structure with ring defects has been proposed. The results show that Photonic crystal fiber with the third ring removed has very low confinement loss of 1.17x10-4dB/km at 1.55µm, chromatic dispersion of - 69ps/km.nm at 0.75µm and zero chromatic dispersion at 0.86µm. The results also show that removing only the third ring reduces chromatic dispersion at shorter wavelengths than at longer wavelengths. Vectorial Finite element method is used for this work. The proposed fiber can be used for short and medium transmission applications.   Citation: Agbemabiese, P. A., Agamah, J. D., Nartey, J. A. and Torkudzor, M. K. (2021). Defect-Photonic Crystal Fiber structure of Zero Chromatic Dispersion very low Confinement loss. International Journal of Technology and Management Research (IJTMR), Vol. 6 (2): Pp.96-105. Received: March 20, 2021Accepted: September 1, 2021

scholarly journals Ring-Core Photonic Crystal Fiber of Terahertz Orbital Angular Momentum Modes with Excellence Guiding Properties in Optical Fiber Communication

Photonics ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 122
Author(s):  
Fahad Ahmed Al-Zahrani ◽  
Md. Anowar Kabir
Keyword(s):  
Angular Momentum ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Orbital Angular Momentum ◽  
High Capacity ◽  
Optical Fiber Communication ◽  
Fused Silica ◽  
Confinement Loss ◽  
Crystal Fiber ◽  
Ring Core

The orbital angular momentum (OAM) of light is used for increasing the optical communication capacity in the mode division multiplexing (MDM) technique. A novel and simple structure of ring-core photonic crystal fiber (RC-PCF) is proposed in this paper. The ring core is doped by the Schott sulfur difluoride material and the cladding region is composed of fused silica with one layer of well-patterned air-holes. The guiding of Terahertz (THz) OAM beams with 58 OAM modes over 0.70 THz (0.20 THz–0.90 THz) frequency is supported by this proposed RC-PCF. The OAM modes are well-separated for their large refractive index difference above 10−4. The dispersion profile of each mode is varied in the range of 0.23–7.77 ps/THz/cm. The ultra-low confinement loss around 10−9 dB/cm and better mode purity up to 0.932 is achieved by this RC-PCF. For these good properties, the proposed fiber is a promising candidate to be applied in the THz OAM transmission systems with high feasibility and high capacity.

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 Numerical simulation of all-normal dispersion visible to near-infrared supercontinuum generation in photonic crystal fibers with core filled chloroform

2021 ◽  
Vol 130 (1B) ◽  
pp. 43-51
Author(s):  
Thi Minh Ngoc Vo ◽  
Dinh Quang Ho ◽  
Tung Thanh Le ◽  
Thi Gai Le ◽  
Canh Trung Le ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Near Infrared ◽  
Cost Effective ◽  
Fused Silica ◽  
Fiber Structure ◽  
Normal Dispersion ◽  
Crystal Fiber ◽  
Crystal Fibers ◽  
Mode Area

This study proposes a photonic crystal fiber made of fused silica glass, with the core infiltrated with chloroform as a new source of supercontinuum (SC) spectrum. We numerically study the guiding properties of the fiber structure in terms of characteristic dispersion and mode area of the fundamental mode. Based on the results, we optimized the structural geometries of the CHCl3-core photonic crystal fiber to support the broadband SC generations. The fiber structure with a lattice constant of 1 μm, a filling factor of 0.8, and the diameter of the first-ring air holes equaling 0.5 μm operates in all-normal dispersion. The SC with a broadened spectral bandwidth of 0.64 to 1.80 μm is formed by using a pump pulse with a wavelength of 850 nm, 120 fs duration, and power of 0.833 kW. That fiber would be a good candidate for all-fiber SC sources as cost-effective alternative to glass core fibers.

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.

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