scholarly journals Analysis of gallium nitride-based optical microring resonator with doped polymer grafting material

2021 ◽  
Vol 24 (2) ◽  
pp. 736
Author(s):  
Hazura Haroon ◽  
Muhammad Syafiq Ramli ◽  
Siti Khadijah Idris ◽  
Anis Suhaila Mohd Zain ◽  
Hanim Abdul Razak ◽  
...  
Keyword(s):  
Gallium Nitride ◽  
Wavelength Division Multiplexing ◽  
Extinction Ratio ◽  
Microring Resonator ◽  
Design Parameters ◽  
Optimized Design ◽  
Extinction Rate ◽  
Polymer Grafting ◽  
Wavelength Division ◽  
Waveguide Width

<p>In this paper, the Gallium nitride-based optical microring resonator (OMR) filter with polymer grafting material (PMMA) coating was designed and optimized to predict its potential as a wavelength filtering device. The optimization was focused on the design parameters such as polymer thickness, gap separation variation, and the bus and ring waveguide widths. The target is to achieve the best output in terms of insertion loss (IL) and Extinction Ratio for wavelength-division multiplexing (WDM) applications, specifically for the use of the C-Band network. Upon completion, it was found that the optimized design was a ring radius of 10 μm and PMMA thickness of 0.055 μm, with the bus waveguide width of 800 nm and the output bus waveguide of 800 nm giving the observed IL of 0.07 dB and 87.3% extinction rate.</p>

scholarly journals Gain Flatness and Noise Figure Optimization of C-Band EDFA in 16-channels WDM System using FBG and GFF

2017 ◽  
Vol 7 (1) ◽  
pp. 289
Author(s):  
Chakkour Mounia ◽  
Aghzout Otman ◽  
Ait Ahmed Badiaa ◽  
Chaoui Fahd ◽  
Alejos Ana Vazquez ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
Noise Figure ◽  
Fiber Amplifier ◽  
Transmission System ◽  
Design Parameters ◽  
Optimized Design ◽  
Erbium Doped Fiber Amplifier ◽  
Eye Diagram ◽  
Wavelength Division ◽  
Flattening Filter

In this paper, Gain Flatness and Noise Figure of Erbium Doped Fiber Amplifier (EDFA) have been investigated in 16-channels Wavelength Division Multiplexing (WDM). Fiber Bragg Grating (FBG) is used in C-band with the aim to achieve flat EDFA output gain. The proposed model has been studied in detail to evaluate and to enhance the performance of the transmission system in terms of gain, noise figure and eye diagram of the received signals. To that end, various design parameters have been investigated and optimized, such as frequency spacing, EDF length and temperature. To enhance the transmission system performance in terms of gain flatness, the Gain Flattening Filter (GFF) has been introduced in the design. To prove the efficiency of the new design, the optical transmission system with optimized design parameters has been compared with a previous works in the literature. The simulation results show satisfactory performance with quasi-equalized gain for each channel of the WDM transmission system.

scholarly journals Bandwidth Tunable Optical Bandpass Filter Based on Parity-Time Symmetry

Micromachines ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 89
Author(s):  
Bowen Zhang ◽  
Nuo Chen ◽  
Xinda Lu ◽  
Yuhang Hu ◽  
Zihao Yang ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
Tuning Range ◽  
Extinction Ratio ◽  
Optical Filter ◽  
Optimized Design ◽  
Coupling Coefficients ◽  
Large Bandwidth ◽  
Time Symmetry ◽  
Bandwidth Tuning ◽  
Band Pass

A chip-scale tunable optical filter is indispensable to meeting the demand for reconfigurability in wavelength division multiplexing systems, channel routing, and switching, etc. Here, we propose a new scheme of bandwidth tunable band-pass filters based on a parity-time (PT) symmetric coupled microresonator system. Large bandwidth tunability is realized on the basis of the tuning of the relative resonant frequency between coupled rings and by making use of the concept of the exception point (EP) in the PT symmetric systems. Theoretical investigations show that the bandwidth tuning range depends on the intrinsic loss of the microresonators, as well as on the loss contrast between the two cavities. Our proof-of-concept device confirms the tunability and shows a bandwidth tuning range from 21 GHz to 49 GHz, with an extinction ratio larger than 15 dB. The discrepancy between theory and experiment is due to the non-optimized design of the coupling coefficients, as well as to fabrication errors. Our design based on PT symmetry shows a distinct route towards the realization of tunable band-pass filters, providing new ways to explore non-Hermitian light manipulation in conventional integrated devices.

scholarly journals New wavelength division multiplexing bands generated by using a Gaussian pulse in a microring resonator system

2009 ◽  
Vol 2 (1) ◽  
pp. 33-38
Author(s):  
Ura Dunmeekaew ◽  
Metha Tasakorn ◽  
Nithiroth Pornsuwancharoen ◽  
Preecha P. Yupapin
Keyword(s):  
Wavelength Division Multiplexing ◽  
Microring Resonator ◽  
Gaussian Pulse ◽  
Wavelength Division ◽  
Resonator System

scholarly journals Chromatic Dispersion Compensation Effect Performance Enhancements Using FBG and EDFA-Wavelength Division Multiplexing Optical Transmission System

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Mounia Chakkour ◽  
Otman Aghzout ◽  
Badiaa Ait Ahmed ◽  
Fahd Chaoui ◽  
Mounir El Yakhloufi
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Transmission ◽  
Noise Figure ◽  
Dispersion Compensation ◽  
Chromatic Dispersion ◽  
Transmission System ◽  
Complex Model ◽  
Design Parameters ◽  
Optimized Design ◽  
Erbium Doped Fiber Amplifier

An optical transmission system using Fiber Bragg Grating (FBG) and Erbium Doped Fiber Amplifier (EDFA) with new proposed model has been analyzed to overcome chromatic dispersion and attenuation phenomena. To evaluate the transmission system performance of the received signals, a simple model of one channel transmission has been developed in the first step. Also, optical fiber length and attenuation coefficient parameters have been investigated in detail to deal with the optimized corresponding parameter values. Results show that the performance of the optimized design parameters is very efficient in terms of output power (dBm), noise figure (dB), gain (dB), and Q-Factor. The model of one channel developed previously has been adapted to a complex model of four optical channels multiplexing with different wavelengths. FBG and EDFA have been also added to WDM technology system to enhance the chromatic dispersion and the signal attenuation. Results show that the new model is more efficient in terms of Q-Factor and eye diagrams.

Multi-stage Mirror-Based Planar Structure for Wavelength Division Demultiplexing

2018 ◽  
Vol 39 (3) ◽  
pp. 273-283
Author(s):  
Haythem Bany Salameh ◽  
Khaled Jawarneh ◽  
Ahmed Musa
Keyword(s):  
Refractive Index ◽  
Wavelength Division Multiplexing ◽  
Incident Angle ◽  
Low Cost ◽  
Refractive Index Profile ◽  
Design Parameters ◽  
Inhomogeneous Layer ◽  
Wavelength Division ◽  
Spatial Shift ◽  
Multi Stage

Abstract In this paper, a new design for a demultiplexer device for Wavelength Division Multiplexing (WDM) communication system is proposed. The proposed device consists of an inhomogeneous layer of a semiconductor material with refractive index that is graded according to a given profile. To minimize the size of the proposed device and achieve better spatial shift between the multiplexed wavelengths, several mirrors are placed at different locations inside the device. These mirrors will force the multiplexed light to be reflected before reaching the total internal reflection point. By controlling the different design parameters such as incident angle, the refractive index profile, etc., a small size, low cost and less complexity WDM device can be realized. In the design process, we exploits the ray’s spatial shift that results from the introduced mirrors and the material dispersion. In addition, the effect of the aforementioned design parameters on the amount of spatial shift between the adjacent wavelengths and the size of the device has been investigated. Results show that the proposed design achieves higher spatial shift as well as smaller device size in comparison with precedent WDM device designs.

DWDM of Optical Micro Ring Resonator Double Add/Drop Multiplexing for THz Optical Communication

2013 ◽  
Vol 770 ◽  
pp. 390-393 ◽  
Author(s):  
N. Pornsuwancharoen ◽  
M. Tasakorn ◽  
S. Jurajaturasiraratn
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Communication ◽  
High Capacity ◽  
Microring Resonator ◽  
Wavelength Division ◽  
Network Applications ◽  
Wide Range ◽  
Gaussian Input ◽  
The Common ◽  
Very High

A system that can be used to generate the new optical communication bandwidths using a Gaussian pulse propagating within a nonlinear microring resonator double add/drop multiplexing system is discussed. By using the wide range of the Gaussian input pulses, for instance, when the input pulses of the common lasers with center wavelength of 1,500 nm are used. Results obtained shows that more available wavelength bands from the optical communication band can be generated, which can be used to form new dense wavelength division multiplexing bands, whereas the use of the very high capacity more than 200 channels for personal wavelength and network applications is plausible.

scholarly journals Bandwidth-tunable optical filter based on microring resonator and MZI with Fano resonance

2020 ◽  
Vol 49 (4) ◽  
pp. 427-432
Author(s):  
Xia Li ◽  
Chen Shen ◽  
Xiaohan Yu ◽  
Yanqiong Zhang ◽  
Chao Chen ◽  
...  
Keyword(s):  
Extinction Ratio ◽  
Optical Filter ◽  
Blue Shift ◽  
Optical Signal ◽  
Phase Shifters ◽  
Microring Resonator ◽  
Two Phase ◽  
Wavelength Division ◽  
Tunable Optical Filter ◽  
Potential Applications

Abstract A bandwidth-tunable optical filter is fabricated by combining Mach–Zehnder interferometer (MZI) and microring resonator. Both bandwidth red-shift and blue-shift are observed in the experiment. The bandwidth can be tuned from 0.46 to 3.09 nm by controlling two phase shifters. The device also shows an extinction ratio higher than 25 dB. Potential applications are integrated optical signal processing such as reconfigurable filtering and channel selecting in wavelength division multiplexer.

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