Pub Date : 2018-08-06DOI: 10.1364/CLEO_AT.2018.JTH2A.171
T. Yeh, Chun-Yang Chou, Chun-Ying Huang, Y. Yao, Yi-Kai Haung, M. Tsai, Ya-Ju Lee
The coefficient of thermal expansion (CTE) is a physical quantity that indicates the thermal expansion value of a material upon heating. For advanced thermal management, the accurate and immediate determination of the CTE of packaging materials is gaining importance because the demand for high-power lighting-emitting diodes (LEDs) is currently increasing. In this study, we used optical coherence tomography (OCT) to measure the CTE of an InGaN-based (λ = 450 nm) high-power LED encapsulated in polystyrene resin. The distances between individual interfaces of the OCT images were observed and recorded to derive the instantaneous CTE of the packaged LED under different injected currents. The LED junction temperature at different injected currents was established with the forward voltage method. Most importantly, this work validates the hypothesis that OCT can provide an alternative way to directly and nondestructively determine the spatially resolved CTE of the packaged LED device, which offers significant advantages over traditional CTE measurement techniques.
{"title":"Directly Determining the Coefficient of Thermal Expansion of High-power Light-emitting Diodes by Optical Coherence Tomography","authors":"T. Yeh, Chun-Yang Chou, Chun-Ying Huang, Y. Yao, Yi-Kai Haung, M. Tsai, Ya-Ju Lee","doi":"10.1364/CLEO_AT.2018.JTH2A.171","DOIUrl":"https://doi.org/10.1364/CLEO_AT.2018.JTH2A.171","url":null,"abstract":"The coefficient of thermal expansion (CTE) is a physical quantity that indicates the thermal expansion value of a material upon heating. For advanced thermal management, the accurate and immediate determination of the CTE of packaging materials is gaining importance because the demand for high-power lighting-emitting diodes (LEDs) is currently increasing. In this study, we used optical coherence tomography (OCT) to measure the CTE of an InGaN-based (λ = 450 nm) high-power LED encapsulated in polystyrene resin. The distances between individual interfaces of the OCT images were observed and recorded to derive the instantaneous CTE of the packaged LED under different injected currents. The LED junction temperature at different injected currents was established with the forward voltage method. Most importantly, this work validates the hypothesis that OCT can provide an alternative way to directly and nondestructively determine the spatially resolved CTE of the packaged LED device, which offers significant advantages over traditional CTE measurement techniques.","PeriodicalId":6498,"journal":{"name":"2018 Conference on Lasers and Electro-Optics (CLEO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88439363","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 : 2018-08-06DOI: 10.1364/CLEO_SI.2018.SW3M.7
Yuan Li, Wenzhe Li, J. K. Miller, E. Johnson, S. Bera, C. Nie, J. Harrington
The simultaneous excitation and amplification of two higher order modes (HOMs) are demonstrated in a Ho:YAG single crystal fiber (SCF) amplifier for both incoherent and coherent mode combing.
{"title":"Amplification of incoherent and coherently coupled higher order modes in a HO:YAG single crystal fiber","authors":"Yuan Li, Wenzhe Li, J. K. Miller, E. Johnson, S. Bera, C. Nie, J. Harrington","doi":"10.1364/CLEO_SI.2018.SW3M.7","DOIUrl":"https://doi.org/10.1364/CLEO_SI.2018.SW3M.7","url":null,"abstract":"The simultaneous excitation and amplification of two higher order modes (HOMs) are demonstrated in a Ho:YAG single crystal fiber (SCF) amplifier for both incoherent and coherent mode combing.","PeriodicalId":6498,"journal":{"name":"2018 Conference on Lasers and Electro-Optics (CLEO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78269431","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 : 2018-08-06DOI: 10.1364/CLEO_QELS.2018.FTH4G.2
J. Adcock, C. Vigliar, R. Santagati, J. Silverstone, M. Thompson
We present a four-photon, four-qubit graph state generator in Silicon quantum photonics, achieving, for the two and four qubit cases respectively, fidelities of 0.931 ± 0.004 and 0.62 ± 0.04, and a visibility of 0.85 ± 0.03
{"title":"A four-photon graph state generator in silicon","authors":"J. Adcock, C. Vigliar, R. Santagati, J. Silverstone, M. Thompson","doi":"10.1364/CLEO_QELS.2018.FTH4G.2","DOIUrl":"https://doi.org/10.1364/CLEO_QELS.2018.FTH4G.2","url":null,"abstract":"We present a four-photon, four-qubit graph state generator in Silicon quantum photonics, achieving, for the two and four qubit cases respectively, fidelities of 0.931 ± 0.004 and 0.62 ± 0.04, and a visibility of 0.85 ± 0.03","PeriodicalId":6498,"journal":{"name":"2018 Conference on Lasers and Electro-Optics (CLEO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75385500","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 : 2018-08-06DOI: 10.1364/CLEO_SI.2018.STH3A.6
C. Patil, Xiaoyan Zhou, Morten Herskind, Kasper Ejdal Lund, S. Stobbe
Slow-light photonic-crystal waveguides suffer from Anderson localization and propagation losses due to fabrication imperfections. Here we investigate a novel photonic system exhibiting a symmetry-protected two-dimensional Dirac-point feature and observe a >50-fold group-velocity slowdown.
{"title":"Transmission Experiments on Photonic-Crystal Waveguides With a Symmetry-Protected Dirac Point","authors":"C. Patil, Xiaoyan Zhou, Morten Herskind, Kasper Ejdal Lund, S. Stobbe","doi":"10.1364/CLEO_SI.2018.STH3A.6","DOIUrl":"https://doi.org/10.1364/CLEO_SI.2018.STH3A.6","url":null,"abstract":"Slow-light photonic-crystal waveguides suffer from Anderson localization and propagation losses due to fabrication imperfections. Here we investigate a novel photonic system exhibiting a symmetry-protected two-dimensional Dirac-point feature and observe a >50-fold group-velocity slowdown.","PeriodicalId":6498,"journal":{"name":"2018 Conference on Lasers and Electro-Optics (CLEO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80384802","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 : 2018-08-06DOI: 10.1364/CLEO_AT.2018.JTH2A.22
Rupesh Kumar, A. Wonfor, R. Penty, I. White
We demonstrate, for the first time, simultaneous generation, transmission and reception of quantum signals and classical signals on a single wavelength. 61.6kbps quantum key and 590kbps classical data rates are estimated.
{"title":"Quantum-Classical Transmission on Single Wavelength","authors":"Rupesh Kumar, A. Wonfor, R. Penty, I. White","doi":"10.1364/CLEO_AT.2018.JTH2A.22","DOIUrl":"https://doi.org/10.1364/CLEO_AT.2018.JTH2A.22","url":null,"abstract":"We demonstrate, for the first time, simultaneous generation, transmission and reception of quantum signals and classical signals on a single wavelength. 61.6kbps quantum key and 590kbps classical data rates are estimated.","PeriodicalId":6498,"journal":{"name":"2018 Conference on Lasers and Electro-Optics (CLEO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83004599","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 : 2018-08-06DOI: 10.1364/CLEO_SI.2018.STU3B.2
Shimao Li, Zhichao Nong, Xiong Wu, Wen Yu, Mingbo He, Yuntao Zhu, Shengqian Gao, Jie Liu, Z. Li, Liu Liu, Siyuan Yu, Xinlun Cai
In this work we demonstrate chip-to-chip orbital angular momentum (OAM) multiplexing transmission using a pair of ultra-compact silicon integrated (de)multiplexer. Four OAM beams were multiplexed and then were demultiplexed by the devices.
{"title":"Demonstration of Chip-to-Chip Communication Based on Ultra-Compact Orbital Angular Momentum (de)Multiplexers","authors":"Shimao Li, Zhichao Nong, Xiong Wu, Wen Yu, Mingbo He, Yuntao Zhu, Shengqian Gao, Jie Liu, Z. Li, Liu Liu, Siyuan Yu, Xinlun Cai","doi":"10.1364/CLEO_SI.2018.STU3B.2","DOIUrl":"https://doi.org/10.1364/CLEO_SI.2018.STU3B.2","url":null,"abstract":"In this work we demonstrate chip-to-chip orbital angular momentum (OAM) multiplexing transmission using a pair of ultra-compact silicon integrated (de)multiplexer. Four OAM beams were multiplexed and then were demultiplexed by the devices.","PeriodicalId":6498,"journal":{"name":"2018 Conference on Lasers and Electro-Optics (CLEO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81200107","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 : 2018-08-06DOI: 10.1364/CLEO_AT.2018.JTH3C.4
A. Fiore, D. Pellegrino, M. Cotrufo, E. Verhagen, R. Johne, M. Petruzzella, F. Pagliano, F. V. van Otten
An approach to the real-time control of the exciton-photon interaction rate in solid-state systems will be discussed. It enables the temporal shaping of single photons and the coherent coupling of excitons and phonons.
{"title":"Tailoring radiative emission in integrated quantum light sources","authors":"A. Fiore, D. Pellegrino, M. Cotrufo, E. Verhagen, R. Johne, M. Petruzzella, F. Pagliano, F. V. van Otten","doi":"10.1364/CLEO_AT.2018.JTH3C.4","DOIUrl":"https://doi.org/10.1364/CLEO_AT.2018.JTH3C.4","url":null,"abstract":"An approach to the real-time control of the exciton-photon interaction rate in solid-state systems will be discussed. It enables the temporal shaping of single photons and the coherent coupling of excitons and phonons.","PeriodicalId":6498,"journal":{"name":"2018 Conference on Lasers and Electro-Optics (CLEO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77879455","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}
We put forward a more generalized spiral transformation for vortex mode sorting with better separation between adjacent modes. We confirm this theoretical prediction with a compact vortex mode sorter fabricated on a thin quartz plate.
{"title":"High-resolution and compact vortex mode sorters based on a spiral transformation","authors":"Yuanhui Wen, I. Chremmos, Yujie Chen, Jiangbo Zhu, Yanfeng Zhang, Siyuan Yu","doi":"10.1364/CLEO_SI.2018.SW3M.4","DOIUrl":"https://doi.org/10.1364/CLEO_SI.2018.SW3M.4","url":null,"abstract":"We put forward a more generalized spiral transformation for vortex mode sorting with better separation between adjacent modes. We confirm this theoretical prediction with a compact vortex mode sorter fabricated on a thin quartz plate.","PeriodicalId":6498,"journal":{"name":"2018 Conference on Lasers and Electro-Optics (CLEO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79856958","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 : 2018-08-06DOI: 10.1364/CLEO_AT.2018.JTH2A.52
T. Yeh, Chun-Yang Chou, Zu-Po Yang, Nguyen Thi Bich Hanh, Y. Yao, M. Tsai, H. Kuo, Ya-Ju Lee
A random laser is a unique system in which an assembly of disordered scatters is distributed all over the gain medium to sustain the required optical feedbacks by multiple scatterings for the stimulation of lasing action. Due to the absence of well-defined resonance cavity or rigid alignment of optical elements, it is hence difficult to control the random lasing emissions. In this study, we experimentally demonstrated a flexible random laser fabricated on the polyethylene terephthalate (PET) substrate with a high degree of tunability in lasing emissions. Random lasing wavelength is blue-shifted monolithically with the increasing of bending strains exerted on the PET substrate, and the maximum shift of lasing wavelength of ∼15 nm was achieved as a 50% bending strain is exerted on the PET substrate. Such observation is highly repeatable and reversible, and it validates that we are able to control the lasing wavelengths by simply bending the flexible substrate. The result herein shows a great advance for the applications of flexible optoelectronic devices, including wearable devices, ultrathin display, and health sensors.
{"title":"Tunable random lasing emissions by manipulating plasmonic coupling strengths on flexible substrates","authors":"T. Yeh, Chun-Yang Chou, Zu-Po Yang, Nguyen Thi Bich Hanh, Y. Yao, M. Tsai, H. Kuo, Ya-Ju Lee","doi":"10.1364/CLEO_AT.2018.JTH2A.52","DOIUrl":"https://doi.org/10.1364/CLEO_AT.2018.JTH2A.52","url":null,"abstract":"A random laser is a unique system in which an assembly of disordered scatters is distributed all over the gain medium to sustain the required optical feedbacks by multiple scatterings for the stimulation of lasing action. Due to the absence of well-defined resonance cavity or rigid alignment of optical elements, it is hence difficult to control the random lasing emissions. In this study, we experimentally demonstrated a flexible random laser fabricated on the polyethylene terephthalate (PET) substrate with a high degree of tunability in lasing emissions. Random lasing wavelength is blue-shifted monolithically with the increasing of bending strains exerted on the PET substrate, and the maximum shift of lasing wavelength of ∼15 nm was achieved as a 50% bending strain is exerted on the PET substrate. Such observation is highly repeatable and reversible, and it validates that we are able to control the lasing wavelengths by simply bending the flexible substrate. The result herein shows a great advance for the applications of flexible optoelectronic devices, including wearable devices, ultrathin display, and health sensors.","PeriodicalId":6498,"journal":{"name":"2018 Conference on Lasers and Electro-Optics (CLEO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79708014","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 : 2018-08-06DOI: 10.1364/CLEO_SI.2018.STU4P.1
A. Dogariu, R. Miles
We demonstrate time delayed imaging with slow light using high positive dispersion of a passive atomic gas. This filter allows for imaging of Raman, Rayleigh, and Thomson scattering without the need of a spectrometer.
{"title":"Slow Light Imaging Spectroscopy with a Passive Atomic Filter","authors":"A. Dogariu, R. Miles","doi":"10.1364/CLEO_SI.2018.STU4P.1","DOIUrl":"https://doi.org/10.1364/CLEO_SI.2018.STU4P.1","url":null,"abstract":"We demonstrate time delayed imaging with slow light using high positive dispersion of a passive atomic gas. This filter allows for imaging of Raman, Rayleigh, and Thomson scattering without the need of a spectrometer.","PeriodicalId":6498,"journal":{"name":"2018 Conference on Lasers and Electro-Optics (CLEO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86649171","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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