scholarly journals Design of Highly Birefringent and Low Confinement Loss Photonic Crystal Fibre by Introducing Asymmetric Defect Structures

2012 ◽  
Vol 44 (20) ◽  
pp. 38-41
Author(s):  
Lukman V ◽  
Jeena Maria Cherian
Keyword(s):  
Photonic Crystal ◽  
Confinement Loss ◽  
Defect Structures ◽  
Photonic Crystal Fibre

Numerical analysis of photonic crystal fibre with high birefringence and high nonlinearity

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Patrick Atsu Agbemabiese ◽  
Emmanuel Kofi Akowuah
Keyword(s):  
Finite Element Method ◽  
Boundary Condition ◽  
Finite Element ◽  
Photonic Crystal ◽  
Numerical Analysis ◽  
Chromatic Dispersion ◽  
Confinement Loss ◽  
Photonic Crystal Fibre ◽  
High Birefringence ◽  
Air Hole

AbstractA four-ring microstructure photonic crystal fibre with a descending air hole ring cladding is presented. Numerical analysis of the structure is done using full vectorial finite element method with perfectly matched layer (PML) boundary condition. It is demonstrated that it is possible to achieve at 1.55 µm confinement loss of 2.767 × 10−5 dB/m, birefringence of 0.00346 and a nonlinear co-efficient of 41.77 km−1 W−1. Also, chromatic dispersion realised suggests a tuneable zero dispersion at 0.9–1.1 µm wavelength range.

scholarly journals Low-loss single-mode hybrid-lattice hollow-core photonic-crystal fibre

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Foued Amrani ◽  
Jonas H. Osório ◽  
Frédéric Delahaye ◽  
Fabio Giovanardi ◽  
Luca Vincetti ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Single Mode ◽  
Confinement Loss ◽  
Hollow Core ◽  
Low Loss ◽  
Fibre Optics ◽  
Photonic Crystal Fibre ◽  
Single Mode Operation ◽  
Mode Operation ◽  
Beam Delivery

AbstractRemarkable recent demonstrations of ultra-low-loss inhibited-coupling (IC) hollow-core photonic-crystal fibres (HCPCFs) established them as serious candidates for next-generation long-haul fibre optics systems. A hindrance to this prospect and also to short-haul applications such as micromachining, where stable and high-quality beam delivery is needed, is the difficulty in designing and fabricating an IC-guiding fibre that combines ultra-low loss, truly robust single-modeness, and polarisation-maintaining operation. The design solutions proposed to date require a trade-off between low loss and truly single-modeness. Here, we propose a novel IC-HCPCF for achieving low-loss and effective single-mode operation. The fibre is endowed with a hybrid cladding composed of a Kagome-tubular lattice (HKT). This new concept of a microstructured cladding allows us to significantly reduce the confinement loss and, at the same time, preserve truly robust single-mode operation. Experimental results show an HKT-IC-HCPCF with a minimum loss of 1.6 dB/km at 1050 nm and a higher-order mode extinction ratio as high as 47.0 dB for a 10 m long fibre. The robustness of the fibre single-modeness is tested by moving the fibre and varying the coupling conditions. The design proposed herein opens a new route for the development of HCPCFs that combine robust ultra-low-loss transmission and single-mode beam delivery and provides new insight into IC guidance.

Structural and Behavioural Analysis of As2Se3, TeO2, SiC, SiO2 and Si3N4 for Photonic Application

2020 ◽  
Vol 978 ◽  
pp. 360-368
Author(s):  
Shahiruddin ◽  
M.Ashique Hassan ◽  
Anand Kumar ◽  
Dharmendra K. Singh
Keyword(s):  
Photonic Crystal ◽  
Structural Parameters ◽  
Nonlinear Coefficient ◽  
Hexagonal Structure ◽  
Confinement Loss ◽  
Structural Behaviour ◽  
Photoelectric Characteristic ◽  
Photonic Crystal Fibre ◽  
Crystal Fiber ◽  
Arsenic Selenide

The materials significantly influence the structural, optical and photoelectrical characteristic. Materials such as Arsenic selenide, Tellurite Glass, Silicon carbide, Silicon dioxide and Silicon nitride are investigated through finite element method. The models are established to analyse the structural behaviour of polarization preserving fibre of proposed materials. Photoelectric characteristic determines guided properties of photon particles. Refractive index of the materials influences the properties of photonic crystal fibre. A Polarization Splitter based hexagonal structure is proposed, where inner ring of cladding is in elliptical shape air holes and outer rings are in circular air holes. It provides highly negative dispersion, low confinement loss and high nonlinear coefficient between 1µm to 2µm wide wavelength ranges. The dispersion result shows -2000 db/km-nm at 1.55µm wavelength. Polarization beam splitters photonic crystal fiber characteristics of proposed materials are analysed with same structural parameters.

Poly Lactic Acid, Poly Acrylic Acid and Ethanol Based Bio-Materials for PCF Design

2020 ◽  
Vol 978 ◽  
pp. 377-383
Author(s):  
Shahiruddin ◽  
M.Ashique Hassan ◽  
Manisha Singh ◽  
Dharmendra K. Singh
Keyword(s):  
Lactic Acid ◽  
Photonic Crystal ◽  
Acrylic Acid ◽  
Optical Loss ◽  
Confinement Loss ◽  
Poly Lactic Acid ◽  
Photonic Crystal Fibre ◽  
Wide Range ◽  
Different Characteristics ◽  
Poly Acrylic Acid

Optical techniques have a momentous role in different Bio-sensing application, medical diagnosis and treatment. The availability of suitable Bio-materials such as poly lactic acid (PLA), poly acrylic acid (PAA) and ethanol has crucial impact on the designing of Photonic Crystal Fibre (PCF). The device performance and the bio-photonic applications are greatly affected by the different properties of optical, mechanical and biological and functionalities of these bio-materials. Bio-materials results in low optical loss due to its high clearness. It has moderately very less reflection, absorption and scattering of light. The different characteristics of PCF are analysed by using the different polymeric optical bio-materials. Waveguide properties have been numerically investigated by utilising the full vectorial finite element method (FEM). Dispersion at wide range of wavelength may be tuned by changing the structure geometry of bio-materials. Refractive index of Bio-materials influences the properties of Photonic Crystal fibre (PCF). A comparative result of proposed materials PCF characteristics shows highly negative dispersion, low confinement loss.

scholarly journals Designing Dispersion Flattened Photonic Crystal Fiber for Wideband Applications

2019 ◽  
Author(s):  
Kubra Bashir ◽  
◽  
Rabia Zaman ◽  
Irfan Ahmed ◽  
Muhammad Imran Aslam
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Photonic Crystal ◽  
Software Tool ◽  
Square Lattice ◽  
Confinement Loss ◽  
Photonic Crystal Fibre ◽  
Crystal Fiber ◽  
Silica Core ◽  
Low Dispersion

In this paper, we proposed a dispersion flattened photonic crystal fibre (PCF) for having very low dispersion for wide bandwidth as well as low confinement loss. The proposed fibre has been numerically analyzed for Silica core as well as Borosilicate crown glass core with square lattice air holes. In the proposed design we have used elliptical air holes in the inner ring whereas outer rings are circular. Finite Element Method based software tool is used to analyze the proposed design. This comparison of core materials deduces that Borosilicate crown glass PCF produces negative dispersion, making it a good candidate to be used as Dispersion Compensating Fiber (DCF), whereas Silica PCF provides nearly zero dispersion at wavelength range 1.35 µm to 1.70 µm.

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