scholarly journals Circular Photonic Crystal Fibers: Numerical Analysis of Chromatic Dispersion and Losses

ISRN Optics ◽  
2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Partha Sona Maji ◽  
Partha Roy Chaudhuri
Keyword(s):  
Photonic Crystal ◽  
Numerical Analysis ◽  
Photonic Crystal Fiber ◽  
Chromatic Dispersion ◽  
Silica Matrix ◽  
Geometrical Parameters ◽  
Filling Fraction ◽  
Practical Applications ◽  
Crystal Fiber ◽  
Air Hole

Detailed numerical analysis for dispersion properties and losses has been carried out for a new type of Photonic crystal fiber where the air-holes are arranged in a circular pattern with a silica matrix called as Circular Photonic Crystal Fiber (C-PCF). The dependence of different PCF geometrical parameters namely different circular spacings, air-hole diameter and numbers of air-hole rings are carried out in detail towards practical applications. Our numerical analysis establishes that total dispersion is strongly affected by the interplay between material dispersion and waveguide dispersion. For smaller air-filing fraction, adding extra air-hole rings does not change dispersion much whereas for higher air-filling fraction, the dispersion nature changes significantly. With proper adjustment of the parameters ultra-flattened dispersion could be achieved; though the application can be limited by higher losses. However, the ultra-flat dispersion fibers can be used for practical high power applications like supercontinuum generation (SCG) by reducing the loss at the pumping wavelength by increasing the no of air-hole rings. Broadband smooth SCG can also be achieved with low loss oscillating near-zero dispersion fiber with higher no of air-hole rings. The detail study shows that for realistic dispersion engineering we need to be careful for both loss and dispersion.

scholarly journals An Eight-Channel C-Band Demux Based on Multicore Photonic Crystal Fiber

Nanomaterials ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 845 ◽  
Author(s):  
Dror Malka ◽  
Gilad Katz
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Wavelength Division Multiplexing ◽  
Light Propagation ◽  
Beam Propagation Method ◽  
Geometrical Parameters ◽  
Wavelength Division ◽  
Crystal Fiber ◽  
Large Bandwidth ◽  
Air Hole

A novel eight-channel demux device based on multicore photonic crystal fiber (PCF) structures that operate in the C-band range (1530–1565 nm) has been demonstrated. The PCF demux design is based on replacing some air-hole areas with lithium niobate and silicon nitride materials over the PCF axis alongside with the appropriate optimizations of the PCF structure. The beam propagation method (BPM) combined with Matlab codes was used to model the demux device and optimize the geometrical parameters of the PCF structure. The simulation results showed that the eight-channel demux can be demultiplexing after light propagation of 5 cm with a large bandwidth (4.03–4.69 nm) and cross-talk (−16.88 to −15.93 dB). Thus, the proposed device has great potential to be integrated into dense wavelength division multiplexing (DWDM) technology for increasing performances in networking systems.

scholarly journals Characteristics of Highly Birefringent Photonic Crystal Fiber with Defected Core and Equilateral Pentagon Architecture

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Fei Yu ◽  
Zhenpeng Wang ◽  
Wenhao Yang ◽  
Chongyang Lv
Keyword(s):  
Photonic Crystal ◽  
Electric Field ◽  
Photonic Crystal Fiber ◽  
Field Distribution ◽  
Electric Field Distribution ◽  
Chromatic Dispersion ◽  
High Birefringence ◽  
Crystal Fiber ◽  
Highly Nonlinear ◽  
Air Hole

A novel high birefringence and nearly zero dispersion-flattened photonic crystal fiber (PCF) with elliptical defected core (E-DC) and equilateral pentagonal architecture is designed. By applying the full-vector finite element method (FEM), the characteristics of electric field distribution, birefringence, and chromatic dispersion of the proposed E-DC PCF are numerically investigated in detail. The simulation results reveal that the proposed PCF can realize high birefringence, ranging from 10-3 to 10-2 orders of magnitude, owing to the embedded elliptical air hole in the core center. However, the existence of the elliptical air hole gives rise to an extraordinary electric field distribution, where a V-shaped notch appears and the size of the V-shaped notch varies at different operating wavelengths. Also, the mode field diameter is estimated to be about 2 μm, which implies the small effective mode area and highly nonlinear coefficient. Furthermore, the investigation of the chromatic dispersion characteristic shows that the introduction of the elliptical air hole is helpful to control the chromatic dispersion to be negative or nearly zero flattened over a wide wavelength bandwidth.

Design and optimization of photonic crystal fiber with improved optical characteristics

2015 ◽  
Vol 24 (04) ◽  
pp. 1550051 ◽  
Author(s):  
S. Geerthana ◽  
A. Sivanantha Raja ◽  
D. Shanmuga Sundar
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Chromatic Dispersion ◽  
Confinement Loss ◽  
Geometrical Parameters ◽  
Design And Optimization ◽  
High Birefringence ◽  
Crystal Fiber ◽  
Wide Wavelength Range ◽  
Elliptical Core

A highly birefringent photonic crystal fiber (PCF) with large nonlinearity, low dispersion and low confinement loss is designed by introducing a solid elliptical core structure with spiral lattice of circular air holes as a cladding. The dependence of different geometrical parameters, such as pitch size, diameter of air holes and arrangement of air holes are investigated. By optimizing the available parameters, the designed elliptical–spiral PCF offers high birefringence up to 0.005264, high nonlinearity up to 8683.59[Formula: see text]W[Formula: see text][Formula: see text]km[Formula: see text], low chromatic dispersion of [Formula: see text][Formula: see text]ps/nm/km, and low confinement loss of 0.00305[Formula: see text]dB/km within a wide wavelength range of 1000–2000[Formula: see text]nm.

Numerical Analysis of Large Negative Dispersion and highly Birefringent Photonic Crystal Fiber

Optik ◽  
2020 ◽  
Vol 218 ◽  
pp. 164997 ◽  
Author(s):  
Anurag Upadhyay ◽  
Shivam Singh ◽  
Y.K. Prajapati ◽  
Rajeev Tripathi
Keyword(s):  
Photonic Crystal ◽  
Numerical Analysis ◽  
Photonic Crystal Fiber ◽  
Crystal Fiber ◽  
Negative Dispersion

scholarly journals Analysis of the Effect of Air Hole Diameter and Lattice Pitch in Optical Properties for Hexagonal Photonic Crystal Fiber

2015 ◽  
Vol 05 (07) ◽  
pp. 227-233 ◽  
Author(s):  
Sagor Biswas ◽  
Ragib Shakil Rafi ◽  
Md. Abdullah Al-Amin ◽  
Sabbir Alam
Keyword(s):  
Optical Properties ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Hole Diameter ◽  
Crystal Fiber ◽  
Air Hole
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