Pub Date : 2017-10-01DOI: 10.1109/IPCON.2017.8116136
S. K. Sahoo, D. Tang, Cuong Dang
We demonstrated a single-shot high-resolution color-imaging technique through scattering media using a monochromatic camera. This novel approach is enabled by the spectral-decorrelation property and the optical memory-effect of the scattering media. We used deconvolution for imaging, which bypasses cumbersome iterative refocusing, scanning or phase-retrieval procedures.
{"title":"Single shot color imaging through scattering media using a monochromatic camera","authors":"S. K. Sahoo, D. Tang, Cuong Dang","doi":"10.1109/IPCON.2017.8116136","DOIUrl":"https://doi.org/10.1109/IPCON.2017.8116136","url":null,"abstract":"We demonstrated a single-shot high-resolution color-imaging technique through scattering media using a monochromatic camera. This novel approach is enabled by the spectral-decorrelation property and the optical memory-effect of the scattering media. We used deconvolution for imaging, which bypasses cumbersome iterative refocusing, scanning or phase-retrieval procedures.","PeriodicalId":6657,"journal":{"name":"2017 IEEE Photonics Conference (IPC) Part II","volume":"2 1","pages":"353-354"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74597431","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 : 2017-10-01DOI: 10.1109/IPCON.2017.8116160
Honghyuk Kim, Wei Wei, T. Kuech, P. Gopalan, L. Mawst
Semiconductor Laser diodes (LD) employing quantum dot (QD) active regions have attracted attention due to the theoretical predictions: low threshold current density and low temperature sensitivity originated from the delta-function-like density of states and small active volume [1]. However, while high performance devices have been demonstrated, the realization of all the predicted advantages has remained challenging. Self-assembled QDs grown by Stranski-Krastanov (SK) growth mode can suffer from an inhomogeneity in the QD size distribution, as well as an inherent wetting layer [2]. Nanopatterning and selective metalorganic chemical vapor deposition (MOCVD) growth offer a more controllable pathway for QD formation, allowing the QD size to be decoupled from the strain state of the material. This process results in the formation of dense arrays of wetting-layer-free QDs, although the challenges stemming from surface state formation and efficient carrier injection into the QDs remain problematic issues [3]. As such, previously reported LDs employing these In0.3Ga0.7As QD active regions only operate at low temperatures [3]. It has been contended that embedding the SK QDs within an InGaAs quantum well (QW) improves carrier capture into the quantum dots [4]. Here, we demonstrate an In0.1Ga0.9As QW placed adjacent to a wetting layer-free InAs QD active region leads to improved active region carrier collection, allowing for room temperature (RT) lasing. The LDs employ an active region consisting of a dense single-layer array of compressively-strained InAs QDs (Density ∼ 4×1010cm−2), selectively grown by MOCVD on top of a 4nm thick In0.1Ga0.9As QW.
{"title":"Room temperature operation of InAs quantum dot lasers formed by diblock-copolymer lithography and selective area MOCVD growth","authors":"Honghyuk Kim, Wei Wei, T. Kuech, P. Gopalan, L. Mawst","doi":"10.1109/IPCON.2017.8116160","DOIUrl":"https://doi.org/10.1109/IPCON.2017.8116160","url":null,"abstract":"Semiconductor Laser diodes (LD) employing quantum dot (QD) active regions have attracted attention due to the theoretical predictions: low threshold current density and low temperature sensitivity originated from the delta-function-like density of states and small active volume [1]. However, while high performance devices have been demonstrated, the realization of all the predicted advantages has remained challenging. Self-assembled QDs grown by Stranski-Krastanov (SK) growth mode can suffer from an inhomogeneity in the QD size distribution, as well as an inherent wetting layer [2]. Nanopatterning and selective metalorganic chemical vapor deposition (MOCVD) growth offer a more controllable pathway for QD formation, allowing the QD size to be decoupled from the strain state of the material. This process results in the formation of dense arrays of wetting-layer-free QDs, although the challenges stemming from surface state formation and efficient carrier injection into the QDs remain problematic issues [3]. As such, previously reported LDs employing these In0.3Ga0.7As QD active regions only operate at low temperatures [3]. It has been contended that embedding the SK QDs within an InGaAs quantum well (QW) improves carrier capture into the quantum dots [4]. Here, we demonstrate an In0.1Ga0.9As QW placed adjacent to a wetting layer-free InAs QD active region leads to improved active region carrier collection, allowing for room temperature (RT) lasing. The LDs employ an active region consisting of a dense single-layer array of compressively-strained InAs QDs (Density ∼ 4×1010cm−2), selectively grown by MOCVD on top of a 4nm thick In0.1Ga0.9As QW.","PeriodicalId":6657,"journal":{"name":"2017 IEEE Photonics Conference (IPC) Part II","volume":"33 1","pages":"405-406"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76494600","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 : 2017-10-01DOI: 10.1109/IPCON.2017.8116215
J. Kjellman, R. Stabile, K. Williams
Dual layer, dual width waveguides exhibiting enhanced chromatic dispersion can enable photonic circuits for ultrafast optical pulses. With common tools and processes we here demonstrate the creation of the necessary waveguide geometry. 2.6 dB cm−1 shallow waveguide losses validate our process strategy.
具有增强色散的双层双宽波导可以实现超快光脉冲的光子电路。使用常见的工具和过程，我们在这里演示必要的波导几何形状的创建。2.6 dB cm−1的浅波导损耗验证了我们的工艺策略。
{"title":"Fabrication of dual layer, dual width waveguides for dispersion engineered InP photonic circuits","authors":"J. Kjellman, R. Stabile, K. Williams","doi":"10.1109/IPCON.2017.8116215","DOIUrl":"https://doi.org/10.1109/IPCON.2017.8116215","url":null,"abstract":"Dual layer, dual width waveguides exhibiting enhanced chromatic dispersion can enable photonic circuits for ultrafast optical pulses. With common tools and processes we here demonstrate the creation of the necessary waveguide geometry. 2.6 dB cm−1 shallow waveguide losses validate our process strategy.","PeriodicalId":6657,"journal":{"name":"2017 IEEE Photonics Conference (IPC) Part II","volume":"49 1","pages":"543-544"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79771937","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 : 2017-10-01DOI: 10.1109/IPCON.2017.8116108
H. Melkonyan, K. Sloyan, Paulo Moreira, M. Dahlem
We fabricate a gradient-index lens on the end facet of an optical fiber by focused ion beam. At 1550 nm, the lens generates a 2.2 μm spot at a working distance of 4.2 μm. This lens can be used for efficient edge-coupling into optical chip.
{"title":"Fabrication of a gradient-index optical fiber lens by focused ion beam","authors":"H. Melkonyan, K. Sloyan, Paulo Moreira, M. Dahlem","doi":"10.1109/IPCON.2017.8116108","DOIUrl":"https://doi.org/10.1109/IPCON.2017.8116108","url":null,"abstract":"We fabricate a gradient-index lens on the end facet of an optical fiber by focused ion beam. At 1550 nm, the lens generates a 2.2 μm spot at a working distance of 4.2 μm. This lens can be used for efficient edge-coupling into optical chip.","PeriodicalId":6657,"journal":{"name":"2017 IEEE Photonics Conference (IPC) Part II","volume":"43 1","pages":"285-286"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77739132","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 : 2017-10-01DOI: 10.1109/IPCON.2017.8116284
Maheshwar Ghimire, Chuji Wang
In this work, we used two fiber loop ringdown strain sensors for in situ monitoring of the axial stress on a post tension rod and a concrete beam simultaneously during the stressing of the post tension rod embedded into the concrete beam.
{"title":"Simultaneous in situ monitoring of axial stress in post tensioned concrete and rod using fiber loop ringdown sensors","authors":"Maheshwar Ghimire, Chuji Wang","doi":"10.1109/IPCON.2017.8116284","DOIUrl":"https://doi.org/10.1109/IPCON.2017.8116284","url":null,"abstract":"In this work, we used two fiber loop ringdown strain sensors for in situ monitoring of the axial stress on a post tension rod and a concrete beam simultaneously during the stressing of the post tension rod embedded into the concrete beam.","PeriodicalId":6657,"journal":{"name":"2017 IEEE Photonics Conference (IPC) Part II","volume":"43 1","pages":"697-698"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90593140","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 : 2017-10-01DOI: 10.1109/IPCON.2017.8116075
J. Kalkavage, K. Petrillo, E. Adles, T. Clark
We report on a photonic downsampling receiver architecture for millimeter-wave communication systems. Conversion loss advantage of >16 dB is shown compared to modulator-based photonic downconversion. 3 Gb/s millimeter-wave communication system performance is demonstrated.
{"title":"Photonic downsampling receiver for millimeter-wave communications","authors":"J. Kalkavage, K. Petrillo, E. Adles, T. Clark","doi":"10.1109/IPCON.2017.8116075","DOIUrl":"https://doi.org/10.1109/IPCON.2017.8116075","url":null,"abstract":"We report on a photonic downsampling receiver architecture for millimeter-wave communication systems. Conversion loss advantage of >16 dB is shown compared to modulator-based photonic downconversion. 3 Gb/s millimeter-wave communication system performance is demonstrated.","PeriodicalId":6657,"journal":{"name":"2017 IEEE Photonics Conference (IPC) Part II","volume":"1 1","pages":"213-214"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90630557","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 : 2017-10-01DOI: 10.1109/IPCON.2017.8116163
I. Roudas
The mode-dependent signal delay method can be used for the characterization of modal dispersion of multimode flbers. We revise the formalism used by this method and quantify measurement errors due to receiver thermal noise.
{"title":"Modal dispersion characterization of multimode fibers","authors":"I. Roudas","doi":"10.1109/IPCON.2017.8116163","DOIUrl":"https://doi.org/10.1109/IPCON.2017.8116163","url":null,"abstract":"The mode-dependent signal delay method can be used for the characterization of modal dispersion of multimode flbers. We revise the formalism used by this method and quantify measurement errors due to receiver thermal noise.","PeriodicalId":6657,"journal":{"name":"2017 IEEE Photonics Conference (IPC) Part II","volume":"62 1","pages":"411-412"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78685799","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 : 2017-10-01DOI: 10.1109/IPCON.2017.8116018
Georg Böcherer, P. Schulte, Fabian Steiner
Probabilistic shaping schemes and their benefits are reviewed. Probabilistic Amplitude Shaping (PAS) is presented, a layered architecture currently considered for industrial applications. Implementation challenges and proposed solutions are discussed, including distribution matching algorithms for shaping, integration with forward error correction, and digital signal processing.
{"title":"Probabilistic shaping benefits and practicality for higher-order QAM","authors":"Georg Böcherer, P. Schulte, Fabian Steiner","doi":"10.1109/IPCON.2017.8116018","DOIUrl":"https://doi.org/10.1109/IPCON.2017.8116018","url":null,"abstract":"Probabilistic shaping schemes and their benefits are reviewed. Probabilistic Amplitude Shaping (PAS) is presented, a layered architecture currently considered for industrial applications. Implementation challenges and proposed solutions are discussed, including distribution matching algorithms for shaping, integration with forward error correction, and digital signal processing.","PeriodicalId":6657,"journal":{"name":"2017 IEEE Photonics Conference (IPC) Part II","volume":"67 1","pages":"93-93"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78814208","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 : 2017-10-01DOI: 10.1109/IPCON.2017.8116161
A. Pejkic
We review recent advances in longitudinal fiber dispersion engineering that have enabled construction of efficient parametric devices operating at a few photon level. We outline principal physical processes and present operational demonstration of parametric devices for high speed signal processing and sensing.
{"title":"Few photon signal processing and detection in paramteric devices","authors":"A. Pejkic","doi":"10.1109/IPCON.2017.8116161","DOIUrl":"https://doi.org/10.1109/IPCON.2017.8116161","url":null,"abstract":"We review recent advances in longitudinal fiber dispersion engineering that have enabled construction of efficient parametric devices operating at a few photon level. We outline principal physical processes and present operational demonstration of parametric devices for high speed signal processing and sensing.","PeriodicalId":6657,"journal":{"name":"2017 IEEE Photonics Conference (IPC) Part II","volume":"11 1","pages":"407-407"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88731176","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 : 2017-10-01DOI: 10.1109/IPCON.2017.8116104
G. Vartanian, Kwoon Y. Wong, Pei-Cheng Ku
An LED light suitable for general illumination is proposed to enhance subconscious visual responses, which are essential to our well-being. Using the silent substitution technique, a melanopsin-selective flicker was added into white light. A linear optimization algorithm suppresses perceivable fluctuations of colors of illuminated objects.
{"title":"LED lights with hidden intensity-modulated blue channels for enhanced subconscious visual responses","authors":"G. Vartanian, Kwoon Y. Wong, Pei-Cheng Ku","doi":"10.1109/IPCON.2017.8116104","DOIUrl":"https://doi.org/10.1109/IPCON.2017.8116104","url":null,"abstract":"An LED light suitable for general illumination is proposed to enhance subconscious visual responses, which are essential to our well-being. Using the silent substitution technique, a melanopsin-selective flicker was added into white light. A linear optimization algorithm suppresses perceivable fluctuations of colors of illuminated objects.","PeriodicalId":6657,"journal":{"name":"2017 IEEE Photonics Conference (IPC) Part II","volume":"24 1","pages":"277-278"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87365283","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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