The Experts below are selected from a list of 39378 Experts worldwide ranked by ideXlab platform
Mariana Vieira Lima Matias Da Rocha - One of the best experts on this subject based on the ideXlab platform.
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improving the parameterization of wave nonlinearities the importance of wave steepness Spectral Bandwidth and beach slope
Coastal Engineering, 2017Co-Authors: Mariana Vieira Lima Matias Da Rocha, Herve Michallet, Paulo A SilvaAbstract:Abstract Wave-velocity nonlinearities are among the main drivers of sediment transport. For practical engineering purposes, they can be described by simple parameterizations that allow their easier inclusion in nearshore morphodynamic models. Most existing parameterizations propose the estimation of velocity nonlinearities only from local wave parameters (such as the Ursell number). Herein, it is demonstrated that this provides inaccurate estimations of the wave nonlinearities. Furthermore, the effect of offshore wave steepness, offshore Spectral Bandwidth and beach slope on the velocity nonlinearities is shown to be sufficiently important to merit its inclusion in the existing parameterizations. Ruessink et al. (2012) [28] parameterization is modified in order to include both offshore Spectral Bandwidth and a new parameter, NP 0 , which takes into account the beach slope and the squared offshore wave steepness. The new parameterization results in a reduction of the wave-nonlinearities estimation error of more than 50%, particularly for the maximum values of nonlinearity (near breaking) that contribute the most for sediment transport.
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Improving the parameterization of wave nonlinearities – The importance of wave steepness, Spectral Bandwidth and beach slope
Coastal Engineering, 2017Co-Authors: Mariana Vieira Lima Matias Da Rocha, Herve Michallet, Paulo A SilvaAbstract:Abstract Wave-velocity nonlinearities are among the main drivers of sediment transport. For practical engineering purposes, they can be described by simple parameterizations that allow their easier inclusion in nearshore morphodynamic models. Most existing parameterizations propose the estimation of velocity nonlinearities only from local wave parameters (such as the Ursell number). Herein, it is demonstrated that this provides inaccurate estimations of the wave nonlinearities. Furthermore, the effect of offshore wave steepness, offshore Spectral Bandwidth and beach slope on the velocity nonlinearities is shown to be sufficiently important to merit its inclusion in the existing parameterizations. Ruessink et al. (2012) [28] parameterization is modified in order to include both offshore Spectral Bandwidth and a new parameter, NP 0 , which takes into account the beach slope and the squared offshore wave steepness. The new parameterization results in a reduction of the wave-nonlinearities estimation error of more than 50%, particularly for the maximum values of nonlinearity (near breaking) that contribute the most for sediment transport.
Paulo A Silva - One of the best experts on this subject based on the ideXlab platform.
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improving the parameterization of wave nonlinearities the importance of wave steepness Spectral Bandwidth and beach slope
Coastal Engineering, 2017Co-Authors: Mariana Vieira Lima Matias Da Rocha, Herve Michallet, Paulo A SilvaAbstract:Abstract Wave-velocity nonlinearities are among the main drivers of sediment transport. For practical engineering purposes, they can be described by simple parameterizations that allow their easier inclusion in nearshore morphodynamic models. Most existing parameterizations propose the estimation of velocity nonlinearities only from local wave parameters (such as the Ursell number). Herein, it is demonstrated that this provides inaccurate estimations of the wave nonlinearities. Furthermore, the effect of offshore wave steepness, offshore Spectral Bandwidth and beach slope on the velocity nonlinearities is shown to be sufficiently important to merit its inclusion in the existing parameterizations. Ruessink et al. (2012) [28] parameterization is modified in order to include both offshore Spectral Bandwidth and a new parameter, NP 0 , which takes into account the beach slope and the squared offshore wave steepness. The new parameterization results in a reduction of the wave-nonlinearities estimation error of more than 50%, particularly for the maximum values of nonlinearity (near breaking) that contribute the most for sediment transport.
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Improving the parameterization of wave nonlinearities – The importance of wave steepness, Spectral Bandwidth and beach slope
Coastal Engineering, 2017Co-Authors: Mariana Vieira Lima Matias Da Rocha, Herve Michallet, Paulo A SilvaAbstract:Abstract Wave-velocity nonlinearities are among the main drivers of sediment transport. For practical engineering purposes, they can be described by simple parameterizations that allow their easier inclusion in nearshore morphodynamic models. Most existing parameterizations propose the estimation of velocity nonlinearities only from local wave parameters (such as the Ursell number). Herein, it is demonstrated that this provides inaccurate estimations of the wave nonlinearities. Furthermore, the effect of offshore wave steepness, offshore Spectral Bandwidth and beach slope on the velocity nonlinearities is shown to be sufficiently important to merit its inclusion in the existing parameterizations. Ruessink et al. (2012) [28] parameterization is modified in order to include both offshore Spectral Bandwidth and a new parameter, NP 0 , which takes into account the beach slope and the squared offshore wave steepness. The new parameterization results in a reduction of the wave-nonlinearities estimation error of more than 50%, particularly for the maximum values of nonlinearity (near breaking) that contribute the most for sediment transport.
Klaus J Boller - One of the best experts on this subject based on the ideXlab platform.
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25 khz narrow Spectral Bandwidth of a wavelength tunable diode laser with a short waveguide based external cavity
Laser Physics Letters, 2013Co-Authors: Ruud M Oldenbeuving, Christopher James Lee, E J Klein, Herman L Offerhaus, Hong Song, Klaus J BollerAbstract:We report on the Spectral properties of a diode laser with a tunable external cavity mirror, realized as an integrated optics waveguide circuit. Even though the external cavity is short compared to that of other narrow Bandwidth external cavity lasers, the Spectral Bandwidth of this tunable laser is as small as 25 kHz (FWHM). The side-mode suppression ratio (SMSR) is 50 dB. The laser is able to access preset wavelengths in 200 μs and can be tuned over the full telecommunications C-band (1530–1565 nm).
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25 khz narrow Spectral Bandwidth of a wavelength tunable diode laser with a short waveguide based external cavity
arXiv: Optics, 2012Co-Authors: Ruud M Oldenbeuving, Christopher James Lee, E J Klein, Herman L Offerhaus, Hong Song, Klaus J BollerAbstract:We report on the Spectral properties of a diode laser with a tunable external cavity in integrated optics. Even though the external cavity is short compared to other small-Bandwidth external cavity lasers, the Spectral Bandwidth of this tunable laser is as small as 25 kHz (FWHM), at a side-mode suppression ratio (SMSR) of 50 dB. Our laser is also able to access preset wavelengths in as little as 200 us and able to tune over the full telecom C-band (1530 nm - 1565 nm).
Hong Song - One of the best experts on this subject based on the ideXlab platform.
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25 khz narrow Spectral Bandwidth of a wavelength tunable diode laser with a short waveguide based external cavity
Laser Physics Letters, 2013Co-Authors: Ruud M Oldenbeuving, Christopher James Lee, E J Klein, Herman L Offerhaus, Hong Song, Klaus J BollerAbstract:We report on the Spectral properties of a diode laser with a tunable external cavity mirror, realized as an integrated optics waveguide circuit. Even though the external cavity is short compared to that of other narrow Bandwidth external cavity lasers, the Spectral Bandwidth of this tunable laser is as small as 25 kHz (FWHM). The side-mode suppression ratio (SMSR) is 50 dB. The laser is able to access preset wavelengths in 200 μs and can be tuned over the full telecommunications C-band (1530–1565 nm).
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25 khz narrow Spectral Bandwidth of a wavelength tunable diode laser with a short waveguide based external cavity
arXiv: Optics, 2012Co-Authors: Ruud M Oldenbeuving, Christopher James Lee, E J Klein, Herman L Offerhaus, Hong Song, Klaus J BollerAbstract:We report on the Spectral properties of a diode laser with a tunable external cavity in integrated optics. Even though the external cavity is short compared to other small-Bandwidth external cavity lasers, the Spectral Bandwidth of this tunable laser is as small as 25 kHz (FWHM), at a side-mode suppression ratio (SMSR) of 50 dB. Our laser is also able to access preset wavelengths in as little as 200 us and able to tune over the full telecom C-band (1530 nm - 1565 nm).
Christopher James Lee - One of the best experts on this subject based on the ideXlab platform.
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On-chip visible-to-infrared supercontinuum generation with more than 495 THz Spectral Bandwidth.
Optics express, 2015Co-Authors: Jörn P. Epping, Tim Hellwig, Marcel Hoekman, Richard Mateman, Arne Leinse, Rene Heideman, Albert Van Rees, Peter J. M. Van Der Slot, Christopher James Lee, Carsten FallnichAbstract:We report ultra-broadband supercontinuum generation in high-confinement Si3N4 integrated optical waveguides. The spectrum extends through the visible (from 470 nm) to the infrared Spectral range (2130 nm) comprising a Spectral Bandwidth wider than 495 THz, which is the widest supercontinuum spectrum generated on a chip.
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25 khz narrow Spectral Bandwidth of a wavelength tunable diode laser with a short waveguide based external cavity
Laser Physics Letters, 2013Co-Authors: Ruud M Oldenbeuving, Christopher James Lee, E J Klein, Herman L Offerhaus, Hong Song, Klaus J BollerAbstract:We report on the Spectral properties of a diode laser with a tunable external cavity mirror, realized as an integrated optics waveguide circuit. Even though the external cavity is short compared to that of other narrow Bandwidth external cavity lasers, the Spectral Bandwidth of this tunable laser is as small as 25 kHz (FWHM). The side-mode suppression ratio (SMSR) is 50 dB. The laser is able to access preset wavelengths in 200 μs and can be tuned over the full telecommunications C-band (1530–1565 nm).
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25 khz narrow Spectral Bandwidth of a wavelength tunable diode laser with a short waveguide based external cavity
arXiv: Optics, 2012Co-Authors: Ruud M Oldenbeuving, Christopher James Lee, E J Klein, Herman L Offerhaus, Hong Song, Klaus J BollerAbstract:We report on the Spectral properties of a diode laser with a tunable external cavity in integrated optics. Even though the external cavity is short compared to other small-Bandwidth external cavity lasers, the Spectral Bandwidth of this tunable laser is as small as 25 kHz (FWHM), at a side-mode suppression ratio (SMSR) of 50 dB. Our laser is also able to access preset wavelengths in as little as 200 us and able to tune over the full telecom C-band (1530 nm - 1565 nm).
