The Experts below are selected from a list of 17373 Experts worldwide ranked by ideXlab platform
Farhad Mehdizadeh - One of the best experts on this subject based on the ideXlab platform.
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An All-Optical Digital 2-to-1 Multiplexer Using Photonic Crystal-Based Nonlinear Ring Resonators
Journal of Electronic Materials, 2019Co-Authors: Taiyin Zhao, Mehrnoush Asghari, Farhad MehdizadehAbstract:In this paper, we proposed a structure to realize an all-optical digital multiplexer. The proposed structure had two inputs, one control and one output port. Using the control port, one can decide which input port can be connected to the output port. The proposed structure consisted of two nonlinear photonic crystal ring resonators, L-shaped and T-shaped, and a straight waveguide. Total Footprint and maximum delay time of the proposed structure were 479 μm2 and 3 ps, respectively.
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Design and simulation of all optical decoder based on nonlinear PhCRRs
Optik, 2018Co-Authors: Farhad Mehdizadeh, Hamed Alipour-banaei, Somaye SerajmohammadiAbstract:Abstract An all optical 2*4 decoder will be designed and proposed in this paper. Nonlinear photonic crystal ring resonators are used for realizing the proposed decoder. Nonlinear photonic crystal ring resonators will be achieved by introducing nonlinear rods made of doped glass around the core section of the resonator. In the proposed structure X and Y port was used to switch the optical beams coming from E between O0, O1, O2 and O3 output ports. The optical intensity required for performing the switching task is about 50 W/μm2. The maximum switching frequency and the Total Footprint of the proposed are 10 GHz, and 581 μm2. Reduced input optical intensity and compactness are the main characteristics of the present work. Numerical methods such as plane wave expansion and finite difference time domain were used for performing the required calculations.
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Ultra-fast analog-to-digital converter based on a nonlinear triplexer and an optical coder with a photonic crystal structure.
Applied optics, 2017Co-Authors: Farhad Mehdizadeh, Hamed Alipour-banaei, Mohammad Soroosh, Ebrahim FarshidiAbstract:In this paper, we propose what we believe is a novel all-optical analog-to-digital converter (ADC) based on photonic crystals. The proposed structure is composed of a nonlinear triplexer and an optical coder. The nonlinear triplexer is for creating discrete levels in the continuous optical input signal, and the optical coder is for generating a 2-bit standard binary code out of the discrete levels coming from the nonlinear triplexer. Controlling the resonant mode of the resonant rings through optical intensity is the main objective and working mechanism of the proposed structure. The maximum delay time obtained for the proposed structure was about 5 ps and the Total Footprint is about 1520 μm2.
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All optical 2-bit analog to digital converter using photonic crystal based cavities
Optical and Quantum Electronics, 2017Co-Authors: Farhad Mehdizadeh, Hamed Alipour-banaei, Mohammad Soroosh, Ebrahim FarshidiAbstract:A novel design for realizing all optical analog to digital converter will be proposed in this paper. The proposed structure consists of two main parts; a nonlinear 3-channel demultiplexer, followed by an optical coder. The nonlinear demultiplexer will be used to quantize the input analog signal according to its optical intensity and the coder will convert the quantized levels into 2-bit binary codes. The nonlinear demultiplexer will be realized using three nonlinear resonant cavities. At appropriate values of input signal optical intensity one of the cavities can drop the optical beam to its corresponding output port. The proposed structure is capable of supporting maximum sampling rate up to 52 GS/s and Total Footprint of the structure is about 924 µm2.
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A Novel Proposal for All Optical Analog-to-Digital Converter Based on Photonic Crystal Structures
IEEE Photonics Journal, 2017Co-Authors: Farhad Mehdizadeh, Hamed Alipour-banaei, Mohammad Soroosh, Ebrahim FarshidiAbstract:In this paper, we proposed a novel all optical analog-to-digital (ADC) converter based on photonic crystals. First of all, we designed a three port nonlinear demultiplexer, for producing discrete levels of input optical intensity. Then, an optical coder was used to generate a 2-bit standard binary code out of the discrete levels coming from the nonlinear demultiplexer. The final structure was realized by combining the nonlinear demultiplexer with the optical coder. The maximum sampling rate of the proposed structure obtained to be about 200 GS/s, and the Total Footprint is about 806 μm2.
Hercules Avramopoulos - One of the best experts on this subject based on the ideXlab platform.
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Fabrication and Experimental Demonstration of a Four-Channel $\,\times\,$ 40 Gb/s TriPleX All-Optical Wavelength Conversion Platform
Journal of Lightwave Technology, 2011Co-Authors: Chronis Stamatiadis, Konstantinos Vyrsokinos, Leontios Stampoulidis, I. Lazarou, B. Schrenk, Arne Leinse, Rene Heideman, C.m. Bruinink, E.j. Klein, Hercules AvramopoulosAbstract:We present a scalable circuit that performs multichannel, all-optical wavelength conversion employing semiconductor optical amplifiers (SOAs) and a densely integrated TriPleX photonic chip. The TriPleX device performs chirp filtering and signal polarity inversion with on-chip signal processing. The chip includes a Total number of 40 arrays of Si3N4-SiO2 microring resonators, delay interferometers and heating elements. The Total Footprint of each array is 2.19 mm2 and the power consumption per integrated heater is below 80 mW. We have interconnected the TriPleX chip with SOAs and we demonstrate experimentally 4 × 40 Gb/s, parallel and wavelength tunable wavelength conversion with power penalties of less than 3 dB.
Bin Chen - One of the best experts on this subject based on the ideXlab platform.
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Urban ecological Footprint prediction based on the Markov chain
Journal of Cleaner Production, 2017Co-Authors: Bin ChenAbstract:Abstract Long-term observation of the urban ecological Footprint will present useful knowledge of anthropogenic impact on and sustainable solutions for cities. This paper proposed a new framework to predict dynamic change and intrinsic structure of urban ecological Footprint with the Markov chain. The system dynamic model based on Markov chain was then established for estimating Beijing's Footprint during the period of 2001–2020. The results showed that Beijing's Footprint kept stable in the long term due to steady consumption pattern and environmental mitigation policy. The Footprint intensity has been decreasing constantly due to the expanding population against the stable Total Footprint. Energy consumption was found to be the major contributor to Beijing's Footprint. Sensitivity analysis was also presented by testing the population and economic growth under five scenarios. This work may provide insights into the land metabolism mechanism and guidance for urban planning.
Hamed Alipour-banaei - One of the best experts on this subject based on the ideXlab platform.
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Design and simulation of all optical decoder based on nonlinear PhCRRs
Optik, 2018Co-Authors: Farhad Mehdizadeh, Hamed Alipour-banaei, Somaye SerajmohammadiAbstract:Abstract An all optical 2*4 decoder will be designed and proposed in this paper. Nonlinear photonic crystal ring resonators are used for realizing the proposed decoder. Nonlinear photonic crystal ring resonators will be achieved by introducing nonlinear rods made of doped glass around the core section of the resonator. In the proposed structure X and Y port was used to switch the optical beams coming from E between O0, O1, O2 and O3 output ports. The optical intensity required for performing the switching task is about 50 W/μm2. The maximum switching frequency and the Total Footprint of the proposed are 10 GHz, and 581 μm2. Reduced input optical intensity and compactness are the main characteristics of the present work. Numerical methods such as plane wave expansion and finite difference time domain were used for performing the required calculations.
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Ultra-fast analog-to-digital converter based on a nonlinear triplexer and an optical coder with a photonic crystal structure.
Applied optics, 2017Co-Authors: Farhad Mehdizadeh, Hamed Alipour-banaei, Mohammad Soroosh, Ebrahim FarshidiAbstract:In this paper, we propose what we believe is a novel all-optical analog-to-digital converter (ADC) based on photonic crystals. The proposed structure is composed of a nonlinear triplexer and an optical coder. The nonlinear triplexer is for creating discrete levels in the continuous optical input signal, and the optical coder is for generating a 2-bit standard binary code out of the discrete levels coming from the nonlinear triplexer. Controlling the resonant mode of the resonant rings through optical intensity is the main objective and working mechanism of the proposed structure. The maximum delay time obtained for the proposed structure was about 5 ps and the Total Footprint is about 1520 μm2.
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All optical 2-bit analog to digital converter using photonic crystal based cavities
Optical and Quantum Electronics, 2017Co-Authors: Farhad Mehdizadeh, Hamed Alipour-banaei, Mohammad Soroosh, Ebrahim FarshidiAbstract:A novel design for realizing all optical analog to digital converter will be proposed in this paper. The proposed structure consists of two main parts; a nonlinear 3-channel demultiplexer, followed by an optical coder. The nonlinear demultiplexer will be used to quantize the input analog signal according to its optical intensity and the coder will convert the quantized levels into 2-bit binary codes. The nonlinear demultiplexer will be realized using three nonlinear resonant cavities. At appropriate values of input signal optical intensity one of the cavities can drop the optical beam to its corresponding output port. The proposed structure is capable of supporting maximum sampling rate up to 52 GS/s and Total Footprint of the structure is about 924 µm2.
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A Novel Proposal for All Optical Analog-to-Digital Converter Based on Photonic Crystal Structures
IEEE Photonics Journal, 2017Co-Authors: Farhad Mehdizadeh, Hamed Alipour-banaei, Mohammad Soroosh, Ebrahim FarshidiAbstract:In this paper, we proposed a novel all optical analog-to-digital (ADC) converter based on photonic crystals. First of all, we designed a three port nonlinear demultiplexer, for producing discrete levels of input optical intensity. Then, an optical coder was used to generate a 2-bit standard binary code out of the discrete levels coming from the nonlinear demultiplexer. The final structure was realized by combining the nonlinear demultiplexer with the optical coder. The maximum sampling rate of the proposed structure obtained to be about 200 GS/s, and the Total Footprint is about 806 μm2.
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Ultra-compact optical photonic crystal based filter using defective resonant cavity
2016Co-Authors: Parisa Abdollahzadeh-badelbou, Hamed Alipour-banaeiAbstract:In this paper we proposed an optical filter based on photonic crystal defective resonant cavity. The most significant characteristic of our filter is its ultra-compact dimensions. The Total Footprint of our filter is 34 . This ultra-compact property makes the proposed structure very suitable for optical integrated circuits. The transmission efficiency of the filter is about 89%. It has been shown that optical behavior of the filter depends on the refractive index and the radius of defect rods.
Ebrahim Farshidi - One of the best experts on this subject based on the ideXlab platform.
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Ultra-fast analog-to-digital converter based on a nonlinear triplexer and an optical coder with a photonic crystal structure.
Applied optics, 2017Co-Authors: Farhad Mehdizadeh, Hamed Alipour-banaei, Mohammad Soroosh, Ebrahim FarshidiAbstract:In this paper, we propose what we believe is a novel all-optical analog-to-digital converter (ADC) based on photonic crystals. The proposed structure is composed of a nonlinear triplexer and an optical coder. The nonlinear triplexer is for creating discrete levels in the continuous optical input signal, and the optical coder is for generating a 2-bit standard binary code out of the discrete levels coming from the nonlinear triplexer. Controlling the resonant mode of the resonant rings through optical intensity is the main objective and working mechanism of the proposed structure. The maximum delay time obtained for the proposed structure was about 5 ps and the Total Footprint is about 1520 μm2.
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All optical 2-bit analog to digital converter using photonic crystal based cavities
Optical and Quantum Electronics, 2017Co-Authors: Farhad Mehdizadeh, Hamed Alipour-banaei, Mohammad Soroosh, Ebrahim FarshidiAbstract:A novel design for realizing all optical analog to digital converter will be proposed in this paper. The proposed structure consists of two main parts; a nonlinear 3-channel demultiplexer, followed by an optical coder. The nonlinear demultiplexer will be used to quantize the input analog signal according to its optical intensity and the coder will convert the quantized levels into 2-bit binary codes. The nonlinear demultiplexer will be realized using three nonlinear resonant cavities. At appropriate values of input signal optical intensity one of the cavities can drop the optical beam to its corresponding output port. The proposed structure is capable of supporting maximum sampling rate up to 52 GS/s and Total Footprint of the structure is about 924 µm2.
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A Novel Proposal for All Optical Analog-to-Digital Converter Based on Photonic Crystal Structures
IEEE Photonics Journal, 2017Co-Authors: Farhad Mehdizadeh, Hamed Alipour-banaei, Mohammad Soroosh, Ebrahim FarshidiAbstract:In this paper, we proposed a novel all optical analog-to-digital (ADC) converter based on photonic crystals. First of all, we designed a three port nonlinear demultiplexer, for producing discrete levels of input optical intensity. Then, an optical coder was used to generate a 2-bit standard binary code out of the discrete levels coming from the nonlinear demultiplexer. The final structure was realized by combining the nonlinear demultiplexer with the optical coder. The maximum sampling rate of the proposed structure obtained to be about 200 GS/s, and the Total Footprint is about 806 μm2.
