scholarly journals Three Coupled Waveguide Sagnac Loop Reflectors for High Performance Integrated Optical Filters

2020 ◽  
Author(s):  
David Moss
Keyword(s):  
High Performance ◽  
Structural Parameters ◽  
Spectral Response ◽  
Optical Filters ◽  
Practical Applications ◽  
Design And Optimization ◽  
Integrated Optical ◽  
Fabrication Tolerances ◽  
Spectral Ranges ◽  
The Impact

<p><b>We theoretically investigate advanced multi-functional integrated photonic filters formed by three waveguide coupled Sagnac loop reflectors (3WC-SLRs). By tailoring the coherent mode interference, the spectral response of the 3WC-SLR resonators is engineered to achieve diverse filtering functions with high performance. These include optical analogues of Fano resonances that yield ultrahigh spectral extinction ratios (ERs) and slope rates, resonance mode splitting with high ERs and low free spectral ranges, and classical Butterworth, Bessel, Chebyshev, and elliptic filters. A detailed analysis of the impact of the structural parameters and fabrication tolerances is provided to facilitate device design and optimization. The requirements for practical applications are also considered. These results theoretically verify the effectiveness of using 3WC-SLR resonators as multi-functional integrated photonic filters for flexible spectral engineering in diverse applications.</b></p>

scholarly journals Three Coupled Waveguide Sagnac Loop Reflectors for High Performance Integrated Optical Filters

2020 ◽  
Author(s):  
David Moss
Keyword(s):  
High Performance ◽  
Structural Parameters ◽  
Spectral Response ◽  
Optical Filters ◽  
Practical Applications ◽  
Design And Optimization ◽  
Integrated Optical ◽  
Fabrication Tolerances ◽  
Spectral Ranges ◽  
The Impact

<p><b>We theoretically investigate advanced multi-functional integrated photonic filters formed by three waveguide coupled Sagnac loop reflectors (3WC-SLRs). By tailoring the coherent mode interference, the spectral response of the 3WC-SLR resonators is engineered to achieve diverse filtering functions with high performance. These include optical analogues of Fano resonances that yield ultrahigh spectral extinction ratios (ERs) and slope rates, resonance mode splitting with high ERs and low free spectral ranges, and classical Butterworth, Bessel, Chebyshev, and elliptic filters. A detailed analysis of the impact of the structural parameters and fabrication tolerances is provided to facilitate device design and optimization. The requirements for practical applications are also considered. These results theoretically verify the effectiveness of using 3WC-SLR resonators as multi-functional integrated photonic filters for flexible spectral engineering in diverse applications.</b></p>

scholarly journals Advanced Classical Optical Filters with Three Waveguide Coupled Sagnac Loop Reflectors

2021 ◽  
Author(s):  
Hamed Arianfard ◽  
Jiayang Wu ◽  
Saulius Juodkazis ◽  
David Moss
Keyword(s):  
High Performance ◽  
Structural Parameters ◽  
Spectral Response ◽  
Optical Filters ◽  
Practical Applications ◽  
Design And Optimization ◽  
Fabrication Tolerances ◽  
Spectral Ranges ◽  
The Impact ◽  
Mode Interference

Abstract We theoretically investigate advanced multi-functional integrated photonic filters formed by three waveguide coupled Sagnac loop reflectors (3WC-SLRs). By tailoring the coherent mode interference, the spectral response of the 3WC-SLR resonators is engineered to achieve diverse filtering functions with high performance. These include optical analogues of Fano resonances that yield ultrahigh spectral extinction ratios (ERs) and slope rates, resonance mode splitting with high ERs and low free spectral ranges, and classical Butterworth, Bessel, Chebyshev, and elliptic filters. A detailed analysis of the impact of the structural parameters and fabrication tolerances is provided to facilitate device design and optimization. The requirements for practical applications are also considered. These results theoretically verify the effectiveness of using 3WC-SLR resonators as multi-functional integrated photonic filters for flexible spectral engineering in diverse applications.

scholarly journals Advanced Three Waveguide Sagnac Loop Reflectors for High Performance Optical Filters

2021 ◽  
Author(s):  
David Moss
Keyword(s):  
High Performance ◽  
Structural Parameters ◽  
Spectral Response ◽  
Optical Filters ◽  
Resonance Mode ◽  
Practical Applications ◽  
Design And Optimization ◽  
Mode Splitting ◽  
Fabrication Tolerances ◽  
Spectral Ranges

We theoretically investigate advanced multi-functionalintegrated photonic filters formed by three waveguide coupledSagnac loop reflectors (3WC-SLRs). By tailoring the coherentmode interference, the spectral response of the 3WC-SLRresonators is engineered to achieve diverse filtering functionswith high performance. These include optical analogues of Fanoresonances that yield ultrahigh spectral extinction ratios (ERs)and slope rates, resonance mode splitting with high ERs and lowfree spectral ranges, and classical Butterworth, Bessel,Chebyshev, and elliptic filters. A detailed analysis of the impactof the structural parameters and fabrication tolerances isprovided to facilitate device design and optimization. Therequirements for practical applications are also considered.These results theoretically verify the effectiveness of using 3WCSLRresonators as multi-functional integrated photonic filters forflexible spectral engineering in diverse applications.

scholarly journals Optimization of Optical Filters based on Integrated Coupled Sagnac Loop Reflectors

2021 ◽  
Author(s):  
David Moss
Keyword(s):  
High Performance ◽  
Structural Parameters ◽  
Optical Filters ◽  
Spectral Slope ◽  
Practical Applications ◽  
Communications Systems ◽  
Switching Functions ◽  
Fabrication Tolerances ◽  
The Impact ◽  
Mode Interference

Abstract We theoretically investigate integrated photonic resonators formed by two mutually coupled Sagnac loop reflectors (MC-SLRs). Mode interference in the MC-SLR resonators is tailored to achieve versatile filter shapes with high performance, which enable flexible spectral engineering for diverse applications. By adjusting the reflectivity of the Sagnac loop reflectors (SLRs) as well as the coupling strength between different SLRs, we achieve optical analogues of Fano resonance with ultrahigh spectral slope rates, wavelength interleaving / non-blocking switching functions with significantly enhanced filtering flatness, and compact bandpass filters with improved roll-off. In our designs the requirements for practical applications are considered, together with detailed analyses of the impact of structural parameters and fabrication tolerances. These results highlight the strong potential of MC-SLR resonators as advanced multi-functional integrated photonic filters for flexible spectral engineering in optical communications systems.

scholarly journals Advanced Integrated Photonic Filters Designed with Coupled Sagnac Loop Reflectors

2020 ◽  
Author(s):  
David Moss
Keyword(s):  
Optical Communications ◽  
High Performance ◽  
Structural Parameters ◽  
Spectral Slope ◽  
Practical Applications ◽  
Communications Systems ◽  
Switching Functions ◽  
Fabrication Tolerances ◽  
The Impact ◽  
Mode Interference

<p>We theoretically investigate integrated photonic resonators formed by two mutually coupled Sagnac loop reflectors (MC-SLRs). Mode interference in the MC-SLR resonators is tailored to achieve versatile filter shapes with high performance, which enable flexible spectral engineering for diverse applications. By adjusting the reflectivity of the Sagnac loop reflectors (SLRs) as well as the coupling strength between different SLRs, we achieve optical analogues of Fano resonance with ultrahigh spectral slope rates, wavelength interleaving / non-blocking switching functions with significantly enhanced filtering flatness, and compact bandpass filters with improved roll-off. In our designs the requirements for practical applications are considered, together with detailed analyses of the impact of structural parameters and fabrication tolerances. These results highlight the strong potential of MC-SLR resonators as advanced multi-functional integrated photonic filters for flexible spectral engineering in optical communications systems.</p>

scholarly journals Advanced Integrated Photonic Filters in Silicon Nanowires Designed with Coupled Sagnac Loop Reflectors

2020 ◽  
Author(s):  
David Moss
Keyword(s):  
Silicon Nanowires ◽  
High Performance ◽  
Structural Parameters ◽  
Spectral Slope ◽  
Practical Applications ◽  
Communications Systems ◽  
Switching Functions ◽  
Fabrication Tolerances ◽  
The Impact ◽  
Mode Interference

We theoretically investigate integrated photonic resonators formed by two mutually coupled Sagnac loop reflectors (MC-SLRs). Mode interference in the MC-SLR resonators is tailored to achieve versatile filter shapes with high performance, which enable flexible spectral engineering for diverse applications. By adjusting the reflectivity of the Sagnac loop reflectors (SLRs) as well as the coupling strength between different SLRs, we achieve optical analogues of Fano resonance with ultrahigh spectral slope rates, wavelength interleaving / non-blocking switching functions with significantly enhanced filtering flatness, and compact bandpass filters with improved roll-off. In our designs the requirements for practical applications are considered, together with detailed analyses of the impact of structural parameters and fabrication tolerances. These results highlight the strong potential of MC-SLR resonators as advanced multi-functional integrated photonic filters for flexible spectral engineering in optical communications systems.

scholarly journals Advanced Integrated Photonic Filters Designed with Coupled Sagnac Loop Reflectors

2020 ◽  
Author(s):  
David Moss
Keyword(s):  
Optical Communications ◽  
High Performance ◽  
Structural Parameters ◽  
Spectral Slope ◽  
Practical Applications ◽  
Communications Systems ◽  
Switching Functions ◽  
Fabrication Tolerances ◽  
The Impact ◽  
Mode Interference

<p>We theoretically investigate integrated photonic resonators formed by two mutually coupled Sagnac loop reflectors (MC-SLRs). Mode interference in the MC-SLR resonators is tailored to achieve versatile filter shapes with high performance, which enable flexible spectral engineering for diverse applications. By adjusting the reflectivity of the Sagnac loop reflectors (SLRs) as well as the coupling strength between different SLRs, we achieve optical analogues of Fano resonance with ultrahigh spectral slope rates, wavelength interleaving / non-blocking switching functions with significantly enhanced filtering flatness, and compact bandpass filters with improved roll-off. In our designs the requirements for practical applications are considered, together with detailed analyses of the impact of structural parameters and fabrication tolerances. These results highlight the strong potential of MC-SLR resonators as advanced multi-functional integrated photonic filters for flexible spectral engineering in optical communications systems.</p>

scholarly journals Spectral Irradiance Influence on Solar Cells Efficiency

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5017
Author(s):  
David Leitão ◽  
João Paulo N. Torres ◽  
João F. P. Fernandes
Keyword(s):  
Near Infrared ◽  
Spectral Response ◽  
Experimental Tests ◽  
Optical Filters ◽  
Spectral Irradiance ◽  
Copper Indium ◽  
Input Variables ◽  
Relative Errors ◽  
The Impact ◽  
High Pass

This paper investigates the influence of the spectral irradiance variation and the spectral response (SR) on the production of energy by photovoltaic cells. To determine the impact of SR and spectral irradiance on m-Si and perovskite cells, experimental tests were conducted outdoors, used optical filters to select different zones of the spectrum. For the computational simulations of the different photovoltaic modules, when subjected to a certain spectral irradiance, a model with spectral factor (SF) was implemented. The SF model accurately simulated the experiments performed for the high-pass filters. The highest relative errors for certain irradiation bands occurred due to the input variables used in the model, which did not fully describe the reality of the experiments performed. The effect of the SR and the spectral irradiance for each of them were observed through the simulations for the m-Si, a-Si, CdTe, and copper indium selenide (CIS) modules. The CIS technology presented a better overall result in the near infrared zone, producing about half of the energy produced by the CdTe technology in the visible zone. The SF, spectral incompatibility factor (MM), and spectral effective responsivity (SEF) parameters were verified to be important for studying the photovoltaic energy production.

scholarly journals Advanced optical filters with coupled Sagnac loop waveguide reflectors

2021 ◽  
Author(s):  
David Moss
Keyword(s):  
High Performance ◽  
Optical Filters ◽  
Bandpass Filters ◽  
Resonance Mode ◽  
Fano Resonances ◽  
Mode Splitting ◽  
Silicon Photonic ◽  
Spectral Ranges ◽  
Mode Interference

<p>We present theoretical designs of high performance optical filters in integrated silicon photonic nanowire resonators. We use mode interference in formed by zig-zag waveguide coupled Sagnac loop reflectors (ZWC-SLRs), tailored to achieve diverse filtering functions with good performance. These include compact bandpass filters with improved roll-off, optical analogues of Fano resonances with ultrahigh spectral extinction ratios (ERs) and slope rates, and resonance mode splitting with high ERs and low free spectral ranges. The analysis verifies the feasibility of multi-functional integrated photonic filters based on ZWC-SLR resonators for flexible spectral engineering in diverse applications. </p>

Design and tests of a non-contact Bernoulli gripper for rough-surfaced and fragile objects gripping

2020 ◽  
Vol 40 (5) ◽  
pp. 735-743
Author(s):  
Dong Liu ◽  
Minghao Wang ◽  
Naiyu Fang ◽  
Ming Cong ◽  
Yu Du
Keyword(s):  
Negative Pressure ◽  
Simulation Analysis ◽  
Structural Parameters ◽  
Mathematic Model ◽  
Parameters Optimization ◽  
Dynamics Simulation ◽  
Content Type ◽  
Design And Optimization ◽  
And Performance ◽  
The Impact

Purpose Varied shapes and sizes of different products with irregular rough surface and fragile properties give a challenge to traditional contact gripping. Single Bernoulli grippers are not suited to handle fragile objects as the impact of center negative pressure force could result in large deformation and stress which damage the materials, and they are also have some limitations for gripping objects with different large and small shapes. Thus, this paper aims to design a non-contact gripper for soft, rough-surfaced and fragile objects gripping with multi Bernoulli heads, which have optimal structures and parameters. Design/methodology/approach The compressed air is ejected into four Bernoulli heads through radial and long flow channels, then passes through four strip-shaped narrow gaps after fully developing in the annular cavity to provide negative pressure. Based on the mathematic model and the computational model, the key structural parameters affecting the gripping performance are selected, and parameters optimization of the gripper is performed by computational fluid dynamics simulation analysis and performance evaluation. The orthogonal method is used and L16 orthogonal array is selected for experimental design and optimization. The characteristics of the designed gripper are tested from the aspects of pressure distribution and lifting force. Findings From the applications in gripping different objects, the designed non-contact gripper can grip varied shapes and sizes of soft, rough-surfaced, fragile and sliced objects with little effect of torque. Originality/value In this paper, a non-contact gripper is designed for handling soft, rough-surfaced and fragile objects based on the Bernoulli principle. A systematic approach, which consists of modeling, simulation, optimization and measurement is provided for the non-contact gripper design and tests.

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