Investigation on Ultra-compact 2DPC Coarse Wavelength Division Demultiplexer

2021 ◽  
Author(s):  
Venkatachalam Kannaiyan ◽  
Sriram Kumar D ◽  
Robinson S
Keyword(s):  
Integrated Circuits ◽  
Wavelength Division Multiplexing ◽  
Photonic Band Gap ◽  
Fdtd Method ◽  
Spectral Width ◽  
Transmission Efficiency ◽  
Circular Ring ◽  
Channel Spacing ◽  
Wavelength Division ◽  
Functional Parameters

Abstract A two dimensional Photonic Crystal (2DPC) based eight channel wavelength division demultiplexer is proposed and designed for Coarse Wavelength Division Multiplexing (CWDM) applications. The circular ring resonator, channel selector, circulator rod, L bend waveguide and linear bus waveguide are essential parts of the proposed system. The system’s functional parameters such as Transmission efficiency, resonant wavelength, spectral width, channel spacing, Quality factor and crosstalk are investigated in this paper. The eight different wavelengths of channels are filtered out by altering the size of channel selector rod, setting the radius of the circle shaped cavity and relative refractive index of circulator rod. Initially the Photonic Band gap (PBG) is manipulated by applying Plane Wave Expansion (PWE) method of the 2DPC structure. The functional parameters are analysed by Finite Difference Time Domain (FDTD) method in periodic and non-periodic structure of the proposed system to arrive normalized transmission spectrum. The resonant wavelengths of designed eight paths of the device are varying from 1420nm to 1460nm with average spectral width and channel spacing are 5.8nm, 5.6nm respectively. The footprint of the device is 286.84µm2. Hence this small device can be implemented for CWDM systems in Photonic Integrated Circuits (PIC).

Investigation of 2D-PC Ring Resonator-Based Demultiplexer for ITU-T G.694.1 WDM Systems

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Venkatachalam Kannaiyan ◽  
Sriram Kumar Dhamodharan ◽  
Robinson Savarimuthu
Keyword(s):  
Wavelength Division Multiplexing ◽  
Ring Resonator ◽  
Photonic Band Gap ◽  
Expansion Method ◽  
Spectral Width ◽  
Active Role ◽  
Transmission Efficiency ◽  
Channel Spacing ◽  
Wavelength Division ◽  
Two Dimensional Photonic Crystal

AbstractIn this proposed work, we have designed two-dimensional photonic crystal ring resonator (2DPC-RR)-based eight-channel demultiplexer for dense wavelength division multiplexing (DWDM) systems. The performance parameters of the proposed demultiplexer such as resonant wavelength, spectral width, quality factor, channel spacing and crosstalk are investigated. The demultiplexer consists of bus waveguide, quasi-square RR and L bend waveguides. Each quasi-square RR has eight-shaped microcavity with different refractive index, which plays an active role for channel selection. The plane wave expansion method is used to generate the modes and photonic band gap of the demultiplexer. The finite difference time domain method is employed to analysis the field distribution and normalized transmission of the proposed demultiplexer. The transmission efficiency, Q factor, spectral width and channel spacing of the demultiplexer are about 98 %, 2,022, 0.8 nm and 1.1 nm, respectively. The aforementioned results are meeting the requirements of the ITU-T G. 694.1 DWDM systems.

scholarly journals Tunable Channel Drop Filter in a Two-Dimensional Photonic Crystal Modulated by a Nematic Liquid Crystal

2006 ◽  
Vol 2006 ◽  
pp. 1-6 ◽  
Author(s):  
Chen-Yang Liu ◽  
Lien-Wen Chen
Keyword(s):  
Liquid Crystals ◽  
Integrated Circuits ◽  
Wavelength Division Multiplexing ◽  
Light Propagation ◽  
Nematic Liquid Crystals ◽  
Fdtd Method ◽  
Wavelength Division ◽  
Resonance Frequencies ◽  
Potential Applications ◽  
Control Light

Photonic crystals (PCs) have many potential applications because of their ability to control light-wave propagation and because PC-based waveguides may be integrated into optical circuits. We propose a novel tunable PC channel drop filter based on nematic liquid crystals and investigate its properties numerically by using the finite-difference time-domain (FDTD) method. The refractive indices of liquid crystals can be actively modulated after infiltrating nematic liquid crystals into the microcavity in PC waveguides with square lattices. Then we can control light propagation in a PC waveguide. We analyze theQ-factors and resonance frequencies of a tunable PC channel drop filter by considering various indices modulation of liquid crystals. The novel component can be used as wavelength division multiplexing in photonic integrated circuits.

Application of Photonic Crystal Ring Resonators for Realizing All Optical Demultiplexers

Frequenz ◽  
2018 ◽  
Vol 72 (9-10) ◽  
pp. 465-470 ◽  
Author(s):  
Somaye Serajmohammadi ◽  
Hamed Alipour-Banaei ◽  
Farhad Mehdizadeh
Keyword(s):  
Photonic Crystal ◽  
Wavelength Division Multiplexing ◽  
Resonance Wavelength ◽  
Transmission Efficiency ◽  
Ring Resonators ◽  
Channel Spacing ◽  
Wavelength Division ◽  
All Optical ◽  
Core Section ◽  
Ring Core

Abstract Transmission efficiency, quality factor, crosstalk levels and number of output channels are the most crucial parameters in designing optical demultiplexers, suitable for wavelength division multiplexing applications. In this paper we proposed an 8-channel optical demultiplexer based on photonic crystal ring resonator. For performing wavelength selection task we used eight ring resonators. The resonance wavelength of the ring resonators depends on the dimensions of the ring core, therefore we choose eight different values for the lattice constant of the ring resonators core section. The average channel spacing of the structure is about 3 nm the transmission efficiency in most of the channels is equal or more than 99 % except in one channels whose transmission efficiency is 85 %.

A New Two-Dimensional Photonic Crystal Channel Drop Filter Based on Two-Resonant Cavities

2013 ◽  
Vol 760-762 ◽  
pp. 397-400
Author(s):  
Ying Hu ◽  
Gui Qiang Liu ◽  
Xiang Nan Zhang ◽  
Zheng Jie Cai
Keyword(s):  
Photonic Crystal ◽  
Integrated Circuits ◽  
Wavelength Division Multiplexing ◽  
Communication Systems ◽  
Photonic Band Gap ◽  
Fdtd Method ◽  
Two Dimensional ◽  
Perfectly Matched Layers ◽  
Dimensional Photonic Crystal ◽  
Two Dimensional Photonic Crystal

In this paper, a channel drop filter (CDF) is composed of two cubic lattice circular ring resonator cavities and point micro-cavities in a two-dimensional photonic crystal. The photonic band gap is calculated using the plane wave expansion (PWE) method and the optical characteristics of proposed structure are studying by the finite difference time domain (FDTD) method with perfectly matched layers (PMLs) acting as the boundary conditions . Two different wavelengths centered at 1773 nm and 1742 nm have been successful separation in this CDF. These demonstrate that our proposed structure is suitable for photonic integrated circuits (PICs) and coarse wavelength division multiplexing (WDM) optical communication systems.

Loss-Less Elliptical Channel Drop Filter for WDM Applications

2019 ◽  
Vol 40 (4) ◽  
pp. 379-384 ◽  
Author(s):  
S. Naghizade ◽  
S. M. Sattari-Esfahlan
Keyword(s):  
Integrated Circuits ◽  
Wavelength Division Multiplexing ◽  
Optical Filter ◽  
Resonance Wavelength ◽  
Transmission Efficiency ◽  
Ring Resonators ◽  
Physical Parameters ◽  
Wavelength Division ◽  
Filter Performance ◽  
Two Parameters

Abstract In this paper, we proposed optical filter based on two-dimensional photonic crystal elliptical channel for wavelength division multiplexing. We employed ring resonator with ellipse shaped core in proposed structure. The resonance wavelength of the ring resonators depends on two parameters: refractive index and radius of dielectric rods. We investigate the physical parameters governing the filter performance. Our results show that the transmission efficiency is 100 % due to nearly zero reflection and loss in channel. Band width of 4 nm and quality factor of 389 is obtained for filter. Also, the total footprint of proposed structure is 230.4 µm2 which makes it suitable for all optical integrated circuits.

Excellent Quality Factor Ultra-Compact Optical Communication Filter on Ring-Shaped Cavity

2019 ◽  
Vol 40 (1) ◽  
pp. 21-25 ◽  
Author(s):  
S. Naghizade ◽  
S. M. Sattari-Esfahlan
Keyword(s):  
Integrated Circuits ◽  
Quality Factor ◽  
Photonic Band Gap ◽  
Fdtd Method ◽  
Optical Filter ◽  
Transmission Efficiency ◽  
Compact Structure ◽  
Optical Integrated Circuits ◽  
Average Transmission ◽  
Photonic Band

Abstract In this paper, we propose a high-quality factor (QF) ultra-compact structure for designing all optical filter based on two dimensional (2D) photonic crystals that can operate in third communication window range (1550 nm). The simulation results calculated by using 2D finite difference time domain (FDTD) method and photonic band gap (PBG) region are calculated by plane wave expansion (PWE) method. The average transmission efficiency, average QF and optical full width at half maximum (FWHM) bandwidth more than 95 %, 4300 and 0.4 nm obtained, respectively. The value of QF for the proposed structure is a major QF for ring resonator-based filters. We studied the effect of changing the air background to liquid crystal (LC) surrounding the dielectric rods. Results showed that by increasing LC refractive index (n) peak of wavelengths red shifted. The footprint of proposed filter is 160 ${{\mu}}{{\rm{m}}^{\rm{2}}}$ which make the proposed structure promising candidate for optical integrated circuits.

scholarly journals Optimization of DWDM Demultiplexer Using Regression Analysis

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Venkatachalam Rajarajan Balaji ◽  
Mahalingam Murugan ◽  
Savarimuthu Robinson
Keyword(s):  
Refractive Index ◽  
Regression Analysis ◽  
Wavelength Division Multiplexing ◽  
Linear Regression Analysis ◽  
Resonant Cavity ◽  
Transmission Efficiency ◽  
Output Waveguide ◽  
Channel Spacing ◽  
Wavelength Division ◽  
Two Dimensional Photonic Crystal

We propose a novel twelve-channel Dense Wavelength Division Multiplexing (DWDM) demultiplexer, using the two-dimensional photonic crystal (2D PC) with square resonant cavity (SRC) of ITU-T G.694.1 standard. The DWDM demultiplexer consists of an input waveguide, SRC, and output waveguide. The SRC in the proposed demultiplexer consists of square resonator and microcavity. The microcavity center rod radius (Rm) is proportional to refractive index. The refractive index property of the rods filters the wavelengths of odd and even channels. The proposed microcavity can filter twelve ITU-T G.694.1 standard wavelengths with 0.2 nm/25 GHz channel spacing between the wavelengths. From the simulation, we optimize the rod radius and wavelength with linear regression analysis. From the regression analysis, we can achieve 95% of accuracy with an average quality factor of 7890, the uniform spectral line-width of 0.2 nm, the transmission efficiency of 90%, crosstalk of −42 dB, and footprint of about 784 μm2.

Performance enhancement of Raman + EYDFA HOA for UD-WDM system applications

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Anurupa Lubana ◽  
Sanmukh Kaur ◽  
Yugnanda Malhotra
Keyword(s):  
Wavelength Division Multiplexing ◽  
Performance Enhancement ◽  
Optical Amplifier ◽  
Q Factor ◽  
Channel Spacing ◽  
Average Gain ◽  
Wavelength Division ◽  
System Parameters ◽  
Gain Variation ◽  
Hybrid Optical Amplifier

AbstractIn this work, we study and analyze the performance of Raman + Erbium-Ytterbium codoped fiber hybrid optical amplifier (HOA) for an ultradense wavelength division multiplexing (UD-WDM) system having 100 channels. The system has been investigated considering initial values of channel spacing and data rate of 0.1 nm (12.5 GHz) and 100 GB/s, respectively. Initially, the two important WDM system parameters—wavelength and channel spacing—have been selected and then optimization of the proposed HOA has been performed in terms of EYDFA length, pump power and Er+ concentration to achieve higher values of average gain, Q-factor and lower gain variation ratio. The optimized configuration of the HOA results in the achievement of higher value of average gain, Q-factor and gain variation ratio of 47 dB, 14 and 0.14, respectively, which confirms its viability for UD-WDM system applications.

Investigation and optimization of EYDFA + Raman + EYDFA hybrid optical amplifier for SD-WDM systems in C+L band

2021 ◽  
pp. 2150006
Author(s):  
Anurupa Lubana ◽  
Sanmukh Kaur
Keyword(s):  
Wavelength Division Multiplexing ◽  
Signal To Noise Ratio ◽  
Fiber Amplifier ◽  
Optical Amplifier ◽  
Optical Signal ◽  
Channel Spacing ◽  
Channel System ◽  
Wavelength Division ◽  
Gain Variation ◽  
Hybrid Optical Amplifier

In this paper, we present a novel erbium–ytterbium doped fiber amplifier (EYDFA) + Raman + EYDFA hybrid optical amplifier (HOA) for a super-dense wavelength division multiplexing (SD-WDM) system application. The performance of the 100-channel system has been investigated for an overall data rate and channel spacing of 100[Formula: see text]Gb/s and 0.4[Formula: see text]nm, respectively, over a wavelength span of 1550–1589.9[Formula: see text]nm. HOA has been optimized for Raman length, EYDFA lengths, pump powers and Er[Formula: see text] concentrations to achieve high average gain and low gain variation ratio of 40.41[Formula: see text]dB and 0.40[Formula: see text]respectively. The optimized configuration of the proposed HOA has been compared with EYDFA + Raman and Raman + EYDFA HOA configurations. The achieved high and flat gain with an acceptable output optical signal to noise ratio (OSNR) in case of EYDFA + Raman + EYDFA HOA; makes it an optimum choice for SD-WDM systems.

DWDM Channel Spacing Effects on the Signal Quality for DWDM/CWDM FTTx Network

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
K. Vinoth Kumar ◽  
P. Venkatesh Kumar ◽  
Ahmed Nabih Zaki Rashed ◽  
Abd El–Naser A. Mohamed ◽  
Mohamed S. Tabbour ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
Chromatic Dispersion ◽  
Network Capacity ◽  
The Other ◽  
Signal Quality ◽  
Dense Wavelength Division Multiplexing ◽  
Channel Spacing ◽  
Wavelength Division ◽  
Spacing Effects ◽  
Coarse Wavelength Division Multiplexing

AbstractIn this paper, two models of fiber-to-the-x (FTTx) networks are provided, one of hybrid dense wavelength division multiplexing/coarse wavelength division multiplexing (DWDM/CWDM) with high subscriber’s allocated bandwidth, and the other of hybrid ultra-dense wavelength division multiplexing/coarse wavelength division multiplexing (UDWDM/CWDM) with high network capacity. The effect of the fiber chromatic dispersion on the signal quality was demonstrated. The behavior of the network with respect to the changing of the DWDM channel spacing and the relation between the channel spacing and the system bit rate was discussed.

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