Pub Date : 2021-09-13DOI: 10.1109/NUSOD52207.2021.9541436
Lorenzo Lombardi, V. Annovazzi-Lodi, G. Aromataris, A. Scirè
We numerically study the behavior of a ring laser subject to bidirectional delayed optical feedback, when the isolated laser is in the quasi-unidirectional regime. We find different regimes, two of which are of special interest, because the laser switching period, between the clockwise and the counter-clockwise mode, is linearly related to the time of flight from the laser to one or both remote reflectors. These regimes are thus suitable to implement a telemeter.
{"title":"Optical Feedback Regimes Suitable for Distance Measurement with a Ring Laser","authors":"Lorenzo Lombardi, V. Annovazzi-Lodi, G. Aromataris, A. Scirè","doi":"10.1109/NUSOD52207.2021.9541436","DOIUrl":"https://doi.org/10.1109/NUSOD52207.2021.9541436","url":null,"abstract":"We numerically study the behavior of a ring laser subject to bidirectional delayed optical feedback, when the isolated laser is in the quasi-unidirectional regime. We find different regimes, two of which are of special interest, because the laser switching period, between the clockwise and the counter-clockwise mode, is linearly related to the time of flight from the laser to one or both remote reflectors. These regimes are thus suitable to implement a telemeter.","PeriodicalId":6780,"journal":{"name":"2021 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD)","volume":"13 1","pages":"89-90"},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73448883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-13DOI: 10.1109/NUSOD52207.2021.9541433
Ruikang Luo, K. Takahata
A product-sum photonic integrated circuit consisting of SOI-based cascaded microring modulators and a 4×1 multimode interference coupler is proposed for CNN computing. A basic product-sum operation is numerically demonstrated for 2×2 matrix.
{"title":"Product-sum photonic integrated circuit based on microring resonators and MMI coupler on SOI","authors":"Ruikang Luo, K. Takahata","doi":"10.1109/NUSOD52207.2021.9541433","DOIUrl":"https://doi.org/10.1109/NUSOD52207.2021.9541433","url":null,"abstract":"A product-sum photonic integrated circuit consisting of SOI-based cascaded microring modulators and a 4×1 multimode interference coupler is proposed for CNN computing. A basic product-sum operation is numerically demonstrated for 2×2 matrix.","PeriodicalId":6780,"journal":{"name":"2021 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD)","volume":"12 1","pages":"127-128"},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73820649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-13DOI: 10.1109/NUSOD52207.2021.9541417
Andreas Pusch, N. Ekins‐Daukes
The efficiency of terrestrial solar energy conversion is fundamentally limited by the Landsberg limit of 93%. Single junction solar cells can, however, reach only about a third of this efficiency, a limitation first formulated by Shockley and Queisser [1] . Many concepts have been proposed to overcome this Shockley-Queisser (SQ) limit for single junction solar cells. In this contribution, we are going to explore the classification of these concepts according to the processes that occur in them and explain how this affects model-building for these devices and the requirements they have to fulfil.
{"title":"Classifiying advanced concepts to assess device requirements for high efficiency solar cells","authors":"Andreas Pusch, N. Ekins‐Daukes","doi":"10.1109/NUSOD52207.2021.9541417","DOIUrl":"https://doi.org/10.1109/NUSOD52207.2021.9541417","url":null,"abstract":"The efficiency of terrestrial solar energy conversion is fundamentally limited by the Landsberg limit of 93%. Single junction solar cells can, however, reach only about a third of this efficiency, a limitation first formulated by Shockley and Queisser [1] . Many concepts have been proposed to overcome this Shockley-Queisser (SQ) limit for single junction solar cells. In this contribution, we are going to explore the classification of these concepts according to the processes that occur in them and explain how this affects model-building for these devices and the requirements they have to fulfil.","PeriodicalId":6780,"journal":{"name":"2021 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD)","volume":"12 1","pages":"49-50"},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75197886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-13DOI: 10.1109/NUSOD52207.2021.9541503
Cheng-Han Ho, Yuh‐Renn Wu
µ-LED’s efficiency is enormously dependent on the chip size, which is believed to be the influence of sidewall traps. However, the decrease of IQE in AlInGaP based red LED is much stronger than nitride based LEDs. This paper examines the role of random alloy fluctuation with our 2D simulation software for the whole LED chip size to extract the major factors leading to the large IQE discrepancy between nitride-based and AlGaInP based LEDs. The design rule of the vertical LEDs to avoid the sidewall influences of µ-LED will be proposed in the presentation.
{"title":"Influences of Random Alloy Fluctuation to the Efficiency of µLED and Optimization of Efficiency with Vertical Type Contact","authors":"Cheng-Han Ho, Yuh‐Renn Wu","doi":"10.1109/NUSOD52207.2021.9541503","DOIUrl":"https://doi.org/10.1109/NUSOD52207.2021.9541503","url":null,"abstract":"µ-LED’s efficiency is enormously dependent on the chip size, which is believed to be the influence of sidewall traps. However, the decrease of IQE in AlInGaP based red LED is much stronger than nitride based LEDs. This paper examines the role of random alloy fluctuation with our 2D simulation software for the whole LED chip size to extract the major factors leading to the large IQE discrepancy between nitride-based and AlGaInP based LEDs. The design rule of the vertical LEDs to avoid the sidewall influences of µ-LED will be proposed in the presentation.","PeriodicalId":6780,"journal":{"name":"2021 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD)","volume":"18 2","pages":"65-66"},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72554404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-13DOI: 10.1109/NUSOD52207.2021.9541457
Hannes Wagner-Mohnsen, P. Altermatt
We present a methodology where we combine numerical TCAD device modeling, machine learning and advanced statistics for getting a deeper understanding of how process variations influence device performance in mass produced crystalline silicon solar cells. For this, we use seven model input parameters that affect the mainstream solar cell design (PERC) and its performance the most and perform about a couple of hundred numerical TCAD device simulations in an expected range of these parameters. As such detailed numerical simulations take long time, we train and validate machine learning models on these simulations, which serve to describe ten thousands of fabricated PERC cells. The method gives concrete information for improving PERC cells with a modest amount of numerical modeling and hence in a very short time. This approach is not limited to a specific solar cell design or product.
{"title":"Machine Learning for Optimization of Mass-Produced Industrial Silicon Solar Cells","authors":"Hannes Wagner-Mohnsen, P. Altermatt","doi":"10.1109/NUSOD52207.2021.9541457","DOIUrl":"https://doi.org/10.1109/NUSOD52207.2021.9541457","url":null,"abstract":"We present a methodology where we combine numerical TCAD device modeling, machine learning and advanced statistics for getting a deeper understanding of how process variations influence device performance in mass produced crystalline silicon solar cells. For this, we use seven model input parameters that affect the mainstream solar cell design (PERC) and its performance the most and perform about a couple of hundred numerical TCAD device simulations in an expected range of these parameters. As such detailed numerical simulations take long time, we train and validate machine learning models on these simulations, which serve to describe ten thousands of fabricated PERC cells. The method gives concrete information for improving PERC cells with a modest amount of numerical modeling and hence in a very short time. This approach is not limited to a specific solar cell design or product.","PeriodicalId":6780,"journal":{"name":"2021 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD)","volume":"27 1","pages":"51-52"},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75052733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-13DOI: 10.1109/NUSOD52207.2021.9541500
Benjamin C. Maglio, Lydia Jarvis, M. Tang, Huiyun Liu, P. Smowton
a modeling routine has been developed to quantify the effects of p-modulation doping in the waveguide core region of InAs quantum dot (QD) devices. Utilizing one dimensional approximations, simulated outputs of reverse and forward devices are simulated providing insight into absorption and gain properties.
{"title":"Modeling the effects of p-modulation doping in InAs quantum dot devices","authors":"Benjamin C. Maglio, Lydia Jarvis, M. Tang, Huiyun Liu, P. Smowton","doi":"10.1109/NUSOD52207.2021.9541500","DOIUrl":"https://doi.org/10.1109/NUSOD52207.2021.9541500","url":null,"abstract":"a modeling routine has been developed to quantify the effects of p-modulation doping in the waveguide core region of InAs quantum dot (QD) devices. Utilizing one dimensional approximations, simulated outputs of reverse and forward devices are simulated providing insight into absorption and gain properties.","PeriodicalId":6780,"journal":{"name":"2021 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD)","volume":"9 1","pages":"21-22"},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81835090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-13DOI: 10.1109/NUSOD52207.2021.9541429
M. Mukit, M. Mamun, R. Stabile, N. Calabretta
We present an efficient fiber-to-chip coupling method for polarization independent single mode titanium dioxide-TiO2 waveguide. The proposed inverse adiabatic taper coupler between a lensed fiber and waveguide consists of a spot size converter and allows coupling efficiency of around 85%.
{"title":"Titanium Dioxide Waveguide Based Inverse Adiabatic Taper Coupler for Fiber-to-Chip Coupling","authors":"M. Mukit, M. Mamun, R. Stabile, N. Calabretta","doi":"10.1109/NUSOD52207.2021.9541429","DOIUrl":"https://doi.org/10.1109/NUSOD52207.2021.9541429","url":null,"abstract":"We present an efficient fiber-to-chip coupling method for polarization independent single mode titanium dioxide-TiO2 waveguide. The proposed inverse adiabatic taper coupler between a lensed fiber and waveguide consists of a spot size converter and allows coupling efficiency of around 85%.","PeriodicalId":6780,"journal":{"name":"2021 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD)","volume":"1 1","pages":"101-102"},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77206018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-13DOI: 10.1109/NUSOD52207.2021.9541466
M. Shekarpour, Mohammad Hasan Yavari
We have proposed harmonically hybrid silicon mode-locked ring laser using intracavity reflectors (ICR’s) to suppress supermode noise. The dynamic and noise properties of ring laser for without-reflector structures (WOICRS) and proposed structure (PS) are investigated using a delay differential equation model (DDE).
{"title":"Noise Suppression of Hybrid Silicon Mode-Locked Ring Laser Using Intracavity Reflectors","authors":"M. Shekarpour, Mohammad Hasan Yavari","doi":"10.1109/NUSOD52207.2021.9541466","DOIUrl":"https://doi.org/10.1109/NUSOD52207.2021.9541466","url":null,"abstract":"We have proposed harmonically hybrid silicon mode-locked ring laser using intracavity reflectors (ICR’s) to suppress supermode noise. The dynamic and noise properties of ring laser for without-reflector structures (WOICRS) and proposed structure (PS) are investigated using a delay differential equation model (DDE).","PeriodicalId":6780,"journal":{"name":"2021 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD)","volume":"112 1","pages":"93-94"},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76544003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-13DOI: 10.1109/NUSOD52207.2021.9541442
N. Dogru, S. H. Duranoglu Tunc, A. M. Al-Dabbagh
For the first time gain-switched short pulse generation with a width of 25-40 ps from excited state is demonstrated applying an external optical Gaussian beam to the excited state of InAs-InP-(113)B quantum dot laser.
{"title":"Short Pulses from QD Laser Excited State","authors":"N. Dogru, S. H. Duranoglu Tunc, A. M. Al-Dabbagh","doi":"10.1109/NUSOD52207.2021.9541442","DOIUrl":"https://doi.org/10.1109/NUSOD52207.2021.9541442","url":null,"abstract":"For the first time gain-switched short pulse generation with a width of 25-40 ps from excited state is demonstrated applying an external optical Gaussian beam to the excited state of InAs-InP-(113)B quantum dot laser.","PeriodicalId":6780,"journal":{"name":"2021 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD)","volume":"38 1","pages":"25-26"},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87089506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-13DOI: 10.1109/NUSOD52207.2021.9541428
Saman Zahiri Rad, A. Weiss, F. Wenzl, E. Leitgeb
Wrist worn mobile sensors have proven to be applicable for various applications, including fitness tracking or gesture recognition. In time- and security-critical application scenarios, the commonly used Radio frequency based communication technologies may pose a bottleneck for further advancements. In this work, we present a simulation environment implemented in Matlab/Simulink that enables the precise simulation of wristbands that are equipped with light emitting diodes, which take over the task of data transfer by means of visible light communication in a fast and secure way.
{"title":"Simulation aided design of a human wrist rotation recognition system combining IMU sensor data with Visible Light Communication","authors":"Saman Zahiri Rad, A. Weiss, F. Wenzl, E. Leitgeb","doi":"10.1109/NUSOD52207.2021.9541428","DOIUrl":"https://doi.org/10.1109/NUSOD52207.2021.9541428","url":null,"abstract":"Wrist worn mobile sensors have proven to be applicable for various applications, including fitness tracking or gesture recognition. In time- and security-critical application scenarios, the commonly used Radio frequency based communication technologies may pose a bottleneck for further advancements. In this work, we present a simulation environment implemented in Matlab/Simulink that enables the precise simulation of wristbands that are equipped with light emitting diodes, which take over the task of data transfer by means of visible light communication in a fast and secure way.","PeriodicalId":6780,"journal":{"name":"2021 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD)","volume":"298 2","pages":"9-10"},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91460441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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