The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Guibin Jiang - One of the best experts on this subject based on the ideXlab platform.
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direct analysis of eight chlorophenols in urine by large volume injection online turbulent flow solid phase extraction liquid chromatography with Multiple Wavelength ultraviolet detection
Talanta, 2014Co-Authors: Guibin JiangAbstract:A novel method for determining eight chlorophenols (CPs) by large volume injection online turbulent flow solid-phase extraction high performance liquid chromatography in urine samples was developed. An aliquot of 1.0 mL urine sample could be analyzed directly after centrifugation. The analytes were preconcentrated online on a Turboflow C18-P SPE column, eluted in back-flush mode, and then separated on an Acclaim PA2 analytical column. Major parameters such as SPE column type, sample loading flow rate and elution time were optimized in detail. Eight CPs from monochlorophenol to pentacholophenol were measured by Multiple-Wavelength UV detection at four different Wavelengths. The limits of detection (LODs) were between 0.5 and 2 ng/mL. The linearity range was from the limit of quantification to 1000 ng/mL for each compound, with the coefficients of determination (r(2)) ranging from 0.9990 to 0.9996. The reproducibility of intraday and interday relative standard deviations (RSDs) ranged from 0.6% to 4.5% (n=5). The method was successfully applied to analyze eight CPs in urine samples. Good recoveries, ranging from 76.3% to 122.9%, were obtained. This simple, sensitive and accurate method provides an alternative way to rapidly analyze and monitor CPs in urine samples, especially for matters of occupational exposure. (C) 2013 Elsevier B.V. All rights reserved.
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direct analysis of eight chlorophenols in urine by large volume injection online turbulent flow solid phase extraction liquid chromatography with Multiple Wavelength ultraviolet detection
Talanta, 2014Co-Authors: Feng Guo, Qian Liu, Jianbo Shi, Fusheng Wei, Guibin JiangAbstract:A novel method for determining eight chlorophenols (CPs) by large volume injection online turbulent flow solid-phase extraction high performance liquid chromatography in urine samples was developed. An aliquot of 1.0 mL urine sample could be analyzed directly after centrifugation. The analytes were preconcentrated online on a Turboflow C18-P SPE column, eluted in back-flush mode, and then separated on an Acclaim PA2 analytical column. Major parameters such as SPE column type, sample loading flow rate and elution time were optimized in detail. Eight CPs from monochlorophenol to pentacholophenol were measured by Multiple-Wavelength UV detection at four different Wavelengths. The limits of detection (LODs) were between 0.5 and 2 ng/mL. The linearity range was from the limit of quantification to 1000 ng/mL for each compound, with the coefficients of determination (r(2)) ranging from 0.9990 to 0.9996. The reproducibility of intraday and interday relative standard deviations (RSDs) ranged from 0.6% to 4.5% (n=5). The method was successfully applied to analyze eight CPs in urine samples. Good recoveries, ranging from 76.3% to 122.9%, were obtained. This simple, sensitive and accurate method provides an alternative way to rapidly analyze and monitor CPs in urine samples, especially for matters of occupational exposure.
Michal Lipson - One of the best experts on this subject based on the ideXlab platform.
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high performance silicon nitride based Multiple Wavelength source
IEEE Photonics Technology Letters, 2012Co-Authors: Jacob S Levy, Mark A Foster, Kasturi Saha, Yoshitomo Okawachi, Alexander L Gaeta, Michal LipsonAbstract:We demonstrate a stable complementary metal-oxide-semiconductor-compatible on-chip Multiple-Wavelength source by filtering and modulating individual comb lines from a parametric optical frequency comb generated in a silicon nitride microring resonator. We show comb operation in a stable low-noise state. Bit-error rate measurements demonstrate negligible power penalty from six independent frequency comb lines when compared with a tunable diode laser baseline. Open eye diagrams confirm the fidelity of the 10 Gb/s data transmitted at the comb frequencies and the suitability of this device for use as a fully integrated silicon-based Wavelength-division-Multiplexing source.
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high performance silicon based Multiple Wavelength source
arXiv: Optics, 2011Co-Authors: Jacob S Levy, Mark A Foster, Kasturi Saha, Yoshitomo Okawachi, Alexander L Gaeta, Michal LipsonAbstract:We demonstrate a stable CMOS-compatible on-chip Multiple-Wavelength source by filtering and modulating individual lines from a frequency comb generated by a microring resonator optical parametric oscillator.. We show comb operation in a low-noise state that is stable and usable for many hours. Bit-error rate measurements demonstrate negligible power penalty from six independent frequencies when compared to a tunable diode laser baseline. Open eye diagrams confirm the fidelity of the 10 Gb/s data transmitted at the comb frequencies and the suitability of this device for use as a fully integrated silicon-based WDM source.
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cmos compatible Multiple Wavelength oscillator for on chip optical interconnects
Nature Photonics, 2010Co-Authors: Jacob S Levy, Mark A Foster, Alexander L Gaeta, Alexander Gondarenko, Amy C Turnerfoster, Michal LipsonAbstract:Silicon photonics enables the fabrication of on-chip, ultrahigh-bandwidth optical networks that are critical for the future of microelectronics1,2,3. Several optical components necessary for implementing a Wavelength division Multiplexing network have been demonstrated in silicon. However, a fully integrated Multiple-Wavelength source capable of driving such a network has not yet been realized. Optical amplification, a necessary component for lasing, has been achieved on-chip through stimulated Raman scattering4,5, parametric mixing6 and by silicon nanocrystals7 or nanopatterned silicon8. Losses in most of these structures have prevented oscillation. Raman oscillators have been demonstrated9,10,11, but with a narrow gain bandwidth that is insufficient for Wavelength division Multiplexing. Here, we demonstrate the first monolithically integrated CMOS-compatible source by creating an optical parametric oscillator formed by a silicon nitride ring resonator on silicon. The device can generate more than 100 new Wavelengths with operating powers below 50 mW. This source can form the backbone of a high-bandwidth optical network on a microelectronic chip. A monolithically integrated CMOS-compatible source is demonstrated using an optical parametric oscillator based on a silicon nitride ring resonator on silicon. Generating more than 100 Wavelengths simultaneously and operating at powers below 50 mW, scientists say that it may form the basis of an on-chip high-bandwidth optical network.
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cmos compatible Multiple Wavelength oscillator for on chip optical interconnects
Nature Photonics, 2010Co-Authors: Jacob S Levy, Mark A Foster, Alexander L Gaeta, Alexander Gondarenko, Amy C Turnerfoster, Michal LipsonAbstract:A monolithically integrated CMOS-compatible source is demonstrated using an optical parametric oscillator based on a silicon nitride ring resonator on silicon. Generating more than 100 Wavelengths simultaneously and operating at powers below 50 mW, scientists say that it may form the basis of an on-chip high-bandwidth optical network.
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Multiple Wavelength integrated photonic networks based on microring resonator devices
Journal of Optical Networking, 2007Co-Authors: B A Small, Keren Bergman, Benjamin G Lee, Michal LipsonAbstract:Feature Issue on Nanoscale Integrated Photonics for Optical Networks Microring resonator devices implemented on silicon and silicon-on-insulator substrates have a unique potential to be used in high-bandwidth Multiple-Wavelength integrated photonic networks. A scheme for the Wavelength allocation is proposed, and its feasibility is verified experimentally. The important system-level trade-offs that result from the proposed scheme, including those among bandwidth, device footprint, and electrical power consumption, are discussed as well.
Feng Guo - One of the best experts on this subject based on the ideXlab platform.
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direct analysis of eight chlorophenols in urine by large volume injection online turbulent flow solid phase extraction liquid chromatography with Multiple Wavelength ultraviolet detection
Talanta, 2014Co-Authors: Feng Guo, Qian Liu, Jianbo Shi, Fusheng Wei, Guibin JiangAbstract:A novel method for determining eight chlorophenols (CPs) by large volume injection online turbulent flow solid-phase extraction high performance liquid chromatography in urine samples was developed. An aliquot of 1.0 mL urine sample could be analyzed directly after centrifugation. The analytes were preconcentrated online on a Turboflow C18-P SPE column, eluted in back-flush mode, and then separated on an Acclaim PA2 analytical column. Major parameters such as SPE column type, sample loading flow rate and elution time were optimized in detail. Eight CPs from monochlorophenol to pentacholophenol were measured by Multiple-Wavelength UV detection at four different Wavelengths. The limits of detection (LODs) were between 0.5 and 2 ng/mL. The linearity range was from the limit of quantification to 1000 ng/mL for each compound, with the coefficients of determination (r(2)) ranging from 0.9990 to 0.9996. The reproducibility of intraday and interday relative standard deviations (RSDs) ranged from 0.6% to 4.5% (n=5). The method was successfully applied to analyze eight CPs in urine samples. Good recoveries, ranging from 76.3% to 122.9%, were obtained. This simple, sensitive and accurate method provides an alternative way to rapidly analyze and monitor CPs in urine samples, especially for matters of occupational exposure.
Fumio Koyama - One of the best experts on this subject based on the ideXlab platform.
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Multiple Wavelength vertical cavity surface emitting lasers by grading a spacer layer for short reach Wavelength division Multiplexing applications
Applied Physics Express, 2009Co-Authors: Padullaparthi Babu Dayal, Takahiro Sakaguchi, Akihiro Matsutani, Fumio KoyamaAbstract:We propose and demonstrate a simple and unique method to fabricate the Multiple-Wavelength vertical-cavity surface-emitting lasers (VCSELs) emitting at 980 nm by grading only the first low-index spacer layer of SiO2/Ta2O5 dielectric mirror. A multi step exposure to UV lithography followed by selective wet chemical etching has been applied to create spacer layer gradients. We have successfully realized equally spaced four-channel VCSELs with Wavelength span exceeding 30.0 nm by grading a 230.0 nm spacer layer and achieved single mode lasing with a side mode suppression ratio in excess of 30.0 dB.
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1 2 µm band gainas gaas high density Multiple Wavelength vertical cavity surface emitting laser array
Japanese Journal of Applied Physics, 2005Co-Authors: Yasuhiro Uchiyama, Akihiro Matsutani, Takashi Kondo, Kazutaka Takeda, Takeshi Uchida, Tomoyuki Miyamoto, Fumio KoyamaAbstract:We demonstrate a densely packed multi-Wavelength GaInAs/GaAs vertical cavity surface emitting laser array emitting in 1200 nm Wavelength band. 110-channel emitters could be integrated in a 2.2 mm long bar with spatial spacing of 20 µm and Wavelength spacing of 0.1 nm. All the emitters exhibit single mode operation with output power of over 1 mW. The Wavelength separation is precisely controlled by adjusting the bias current of each element.
Jacob S Levy - One of the best experts on this subject based on the ideXlab platform.
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high performance silicon nitride based Multiple Wavelength source
IEEE Photonics Technology Letters, 2012Co-Authors: Jacob S Levy, Mark A Foster, Kasturi Saha, Yoshitomo Okawachi, Alexander L Gaeta, Michal LipsonAbstract:We demonstrate a stable complementary metal-oxide-semiconductor-compatible on-chip Multiple-Wavelength source by filtering and modulating individual comb lines from a parametric optical frequency comb generated in a silicon nitride microring resonator. We show comb operation in a stable low-noise state. Bit-error rate measurements demonstrate negligible power penalty from six independent frequency comb lines when compared with a tunable diode laser baseline. Open eye diagrams confirm the fidelity of the 10 Gb/s data transmitted at the comb frequencies and the suitability of this device for use as a fully integrated silicon-based Wavelength-division-Multiplexing source.
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high performance silicon based Multiple Wavelength source
arXiv: Optics, 2011Co-Authors: Jacob S Levy, Mark A Foster, Kasturi Saha, Yoshitomo Okawachi, Alexander L Gaeta, Michal LipsonAbstract:We demonstrate a stable CMOS-compatible on-chip Multiple-Wavelength source by filtering and modulating individual lines from a frequency comb generated by a microring resonator optical parametric oscillator.. We show comb operation in a low-noise state that is stable and usable for many hours. Bit-error rate measurements demonstrate negligible power penalty from six independent frequencies when compared to a tunable diode laser baseline. Open eye diagrams confirm the fidelity of the 10 Gb/s data transmitted at the comb frequencies and the suitability of this device for use as a fully integrated silicon-based WDM source.
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cmos compatible Multiple Wavelength oscillator for on chip optical interconnects
Nature Photonics, 2010Co-Authors: Jacob S Levy, Mark A Foster, Alexander L Gaeta, Alexander Gondarenko, Amy C Turnerfoster, Michal LipsonAbstract:Silicon photonics enables the fabrication of on-chip, ultrahigh-bandwidth optical networks that are critical for the future of microelectronics1,2,3. Several optical components necessary for implementing a Wavelength division Multiplexing network have been demonstrated in silicon. However, a fully integrated Multiple-Wavelength source capable of driving such a network has not yet been realized. Optical amplification, a necessary component for lasing, has been achieved on-chip through stimulated Raman scattering4,5, parametric mixing6 and by silicon nanocrystals7 or nanopatterned silicon8. Losses in most of these structures have prevented oscillation. Raman oscillators have been demonstrated9,10,11, but with a narrow gain bandwidth that is insufficient for Wavelength division Multiplexing. Here, we demonstrate the first monolithically integrated CMOS-compatible source by creating an optical parametric oscillator formed by a silicon nitride ring resonator on silicon. The device can generate more than 100 new Wavelengths with operating powers below 50 mW. This source can form the backbone of a high-bandwidth optical network on a microelectronic chip. A monolithically integrated CMOS-compatible source is demonstrated using an optical parametric oscillator based on a silicon nitride ring resonator on silicon. Generating more than 100 Wavelengths simultaneously and operating at powers below 50 mW, scientists say that it may form the basis of an on-chip high-bandwidth optical network.
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cmos compatible Multiple Wavelength oscillator for on chip optical interconnects
Nature Photonics, 2010Co-Authors: Jacob S Levy, Mark A Foster, Alexander L Gaeta, Alexander Gondarenko, Amy C Turnerfoster, Michal LipsonAbstract:A monolithically integrated CMOS-compatible source is demonstrated using an optical parametric oscillator based on a silicon nitride ring resonator on silicon. Generating more than 100 Wavelengths simultaneously and operating at powers below 50 mW, scientists say that it may form the basis of an on-chip high-bandwidth optical network.
