The Experts below are selected from a list of 94614 Experts worldwide ranked by ideXlab platform
Toshiaki Suhara - One of the best experts on this subject based on the ideXlab platform.
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LiNbO3 Waveguide Quasi-Phase-Matched Highly Nondegenerate Twin Photon Generation Device for Heralded Single Photon Source
Japanese Journal of Applied Physics, 2010Co-Authors: Shozo Kajita, Masatoshi Fujimura, Toshiaki SuharaAbstract:We designed, fabricated, and characterized a LiNbO3 waveguide quasi-phase-matched highly nondegenerate twin photon Generation Device for a heralded single photon source. The power of the generated photon was nearly proportional to the pump power, as theoretically predicted. The temporal correlation of the generated twin photon was demonstrated by a photon coincidence counting experiment.
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Cross-polarized twin photon Generation Device using quasi-phase matched LiNbO/sub 3/ waveguide
IEEE Photonics Technology Letters, 2006Co-Authors: T. Nosaka, B.k. Das, Masatoshi Fujimura, Toshiaki SuharaAbstract:We demonstrate a cross-polarized twin photon Generation Device using a LiNbO/sub 3/ waveguide for the first time. The twin photons can easily be split into each photon, and the Device has applications to polarization-entangled photon Generation. Type II quasi-phase matching (TE/spl rarr/TE+TM) and nonlinear tensor element d/sub 24/ were used for twin photon Generation in the 1.55-/spl mu/m band by the parametric fluorescence.
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Fabrication and Characterization of Cross-Polarized Twin Photon Generation Device Using Quasi-Phase Matched LiNbO 3 Waveguide
2005 Pacific Rim Conference on Lasers & Electro-Optics, 1Co-Authors: T. Nosaka, B.k. Das, Masatoshi Fujimura, Toshiaki SuharaAbstract:We demonstrate a cross-polarized twin photon Generation Device using a LiNbO 3 waveguide for the first time. Type II quasi-phase matching (TE→TE+TM) and nonlinear tensor element d 24 were used for twin photon Generation in the 1.55μm band.
Chaoji Chen - One of the best experts on this subject based on the ideXlab platform.
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highly flexible and efficient solar steam Generation Device
Advanced Materials, 2017Co-Authors: Amy Gong, Chaoji Chen, Yiju Li, Jianwei Song, Feng Jiang, Yudi Kuang, Zhi Yang, Emily Hitz, Bao YangAbstract:Solar steam Generation with subsequent steam recondensation has been regarded as one of the most promising techniques to utilize the abundant solar energy and sea water or other unpurified water through water purification, desalination, and distillation. Although tremendous efforts have been dedicated to developing high-efficiency solar steam Generation Devices, challenges remain in terms of the relatively low efficiency, complicated fabrications, high cost, and inability to scale up. Here, inspired by the water transpiration behavior of trees, the use of carbon nanotube (CNT)-modified flexible wood membrane (F-Wood/CNTs) is demonstrated as a flexible, portable, recyclable, and efficient solar steam Generation Device for low-cost and scalable solar steam Generation applications. Benefitting from the unique structural merits of the F-Wood/CNTs membrane—a black CNT-coated hair-like surface with excellent light absorbability, wood matrix with low thermal conductivity, hierarchical micro- and nanochannels for water pumping and escaping, solar steam Generation Device based on the F-Wood/CNTs membrane demonstrates a high efficiency of 81% at 10 kW cm−2, representing one of the highest values ever-reported. The nature-inspired design concept in this study is straightforward and easily scalable, representing one of the most promising solutions for renewable and portable solar energy Generation and other related phase-change applications.
Eberhard Grube - One of the best experts on this subject based on the ideXlab platform.
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first in man use of a novel embolic protection Device for patients undergoing transcatheter aortic valve implantation
Eurointervention, 2012Co-Authors: Christoph Naber, Alexander Ghanem, Alexander Abizaid, Alexander Wolf, Janmalte Sinning, Nikos Werner, Georg Nickenig, Thomas Schmitz, Eberhard GrubeAbstract:AIMS: We describe the first-in-human experience with a novel cerebral embolic protection Device used during transcatheter aortic valve implantation (TAVI). One current challenge of TAVI is the reduction of procedural stroke. Procedural mobilisation of debris is a known source of cerebral embolisation. Mechanical protection by transient filtration of cerebral blood flow might reduce the embolic burden during TAVI. We aimed to evaluate the feasibility and safety of the Claret CE Pro™ cerebral protection Device in patients undergoing TAVI. METHODS AND RESULTS: Patients scheduled for TAVI were prospectively enrolled at three centres. The Claret CE Pro™ (Claret Medical, Inc. Santa Rosa, CA, USA) cerebral protection Device was placed via the right radial/brachial artery prior to TAVI and was removed after the procedure. The primary endpoint was technical success rate. Secondary endpoints encompassed procedural and 30-day stroke rates, as well as Device-related complications. Deployment of the Claret CE Pro™ cerebral protection Device was intended for use in 40 patients, 35 Devices were implanted into the aortic arch. Technical success rate with delivery of the proximal and distal filter was 60% for the first Generation Device and 87% for the second-Generation Device. Delivery times for the first-Generation Device were 12.4±12.1 minutes and 4.4 ± 2.5 minutes for the second-Generation Device (p<0.05). The quantity of contrast used related to the Claret CE Pro System was 19.6 ± 3.8 ml. Captured debris was documented in at least 19 of 35 implanted Devices (54.3%). No procedural transient ischaemic attacks, minor strokes or major strokes occurred. Thirty-day follow-up showed one minor stroke occurring 30 days after the procedure, and two major strokes both occurring well after the patient had completed TAVI. CONCLUSIONS: The use of the Claret CE Pro™ system is feasible and safe. Capture of debris in more than half of the patients provides evidence for the potential to reduce the procedural cerebral embolic burden utilising this dedicated filter system during TAVI.
Yasuyuki Okamura - One of the best experts on this subject based on the ideXlab platform.
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DFG-based microwave /millimeter-wave signal Generation Device by using LiTaO3 rectangular waveguide
IEICE Electronics Express, 2011Co-Authors: Quang Hong Ngo, Hiroshi Murata, Yasuyuki OkamuraAbstract:We propose a microwave/millimeter-wave signal Generation Device using difference frequency Generation in a rectangular waveguide embedded with a nonlinear LiTaO3 crystal. The rectangular waveguide is designed as a single-guided mode structure for the generated microwave/millimeter-wave signal. Dispersion of the rectangular waveguide is also utilized to obtain a phase matching condition between the input lightwaves and the generated microwave/millimeter-wave. In the experiment, a 25GHz signal was successfully generated. Microwave characteristics of the proposed Device were also investigated by using a 3-D electromagnetic wave analysis software. We expect the proposed Device is applicable for higher-frequency microwave/millimeter-wave signal Generation.
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Millimeter-wave signal Generation Device based on difference frequency Generation in a LiTaO 3 rectangular waveguide
2010 IEEE International Topical Meeting on Microwave Photonics, 2010Co-Authors: Quang Hong Ngo, Hiroshi Murata, Yasuyuki OkamuraAbstract:We have proposed a new DFG-based signal Generation Device in a LiTaO 3 rectangular waveguide. 15 GHz signal was successfully generated from the fabricated Device. In this paper, its application for higher-frequency signal Generation is discussed.
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Microwave Signal Generation Device Using Difference Frequency Generation in a LiTaO $_{3}$ Rectangular Waveguide
Journal of Lightwave Technology, 2010Co-Authors: Quang Hong Ngo, Hiroshi Murata, Yasuyuki OkamuraAbstract:We propose a microwave signal Generation Device using difference frequency Generation in a periodically-poled LiTaO3 rectangular waveguide. In the experiment, a microwave signal was successfully generated at the designed frequency of 15 GHz from the intensity modulated optical signal. The measured frequency response of the fabricated proto-type Device was in good agreement with the theoretically expected ones. We expect the proposed Device can be useful for high-frequency signal Generation, detections of the vector modulation optical signal, and the optical clock signal.
Bao Yang - One of the best experts on this subject based on the ideXlab platform.
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highly flexible and efficient solar steam Generation Device
Advanced Materials, 2017Co-Authors: Amy Gong, Chaoji Chen, Yiju Li, Jianwei Song, Feng Jiang, Yudi Kuang, Zhi Yang, Emily Hitz, Bao YangAbstract:Solar steam Generation with subsequent steam recondensation has been regarded as one of the most promising techniques to utilize the abundant solar energy and sea water or other unpurified water through water purification, desalination, and distillation. Although tremendous efforts have been dedicated to developing high-efficiency solar steam Generation Devices, challenges remain in terms of the relatively low efficiency, complicated fabrications, high cost, and inability to scale up. Here, inspired by the water transpiration behavior of trees, the use of carbon nanotube (CNT)-modified flexible wood membrane (F-Wood/CNTs) is demonstrated as a flexible, portable, recyclable, and efficient solar steam Generation Device for low-cost and scalable solar steam Generation applications. Benefitting from the unique structural merits of the F-Wood/CNTs membrane—a black CNT-coated hair-like surface with excellent light absorbability, wood matrix with low thermal conductivity, hierarchical micro- and nanochannels for water pumping and escaping, solar steam Generation Device based on the F-Wood/CNTs membrane demonstrates a high efficiency of 81% at 10 kW cm−2, representing one of the highest values ever-reported. The nature-inspired design concept in this study is straightforward and easily scalable, representing one of the most promising solutions for renewable and portable solar energy Generation and other related phase-change applications.