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T. F. Krauss - One of the best experts on this subject based on the ideXlab platform.

  • four wave mixing in photonic crystal waveguides slow Light Enhancement and limitations
    Optics Express, 2011
    Co-Authors: Juntao Li, Liam Ofaolain, T. F. Krauss
    Abstract:

    We demonstrate continuous wave four-wave mixing in silicon photonic crystal waveguides of 396 μm length with a group index of ng = 30. The highest observed conversion efficiency is −24 dB for 90 mW coupled input pump power. The key question we address is whether the predicted fourth power dependence of the conversion efficiency on the slowdown factor (η ≈S4) can indeed be observed in this system, and how the conversion efficiency depends on device length in the presence of propagation losses. We find that the expected dependencies hold as long as both realistic losses and the variation of mode shape with slowdown factor are taken into account. Having achieved a good agreement between a simple analytical model and the experiment, we also predict structures that can achieve the same conversion efficiency as already observed in nanowires for the same input power, yet for a device length that is 50 times shorter.

  • Green Light emission in silicon through slow Light enhanced third-harmonic generation in photonic crystal waveguides
    2009 Conference on Lasers and Electro-Optics and 2009 Conference on Quantum electronics and Laser Science Conference, 2009
    Co-Authors: C. Monat, T P White, Liam O'faolain, Brian Corcoran, Benjamin J. Eggleton, Christian Grillet, D. J. Moss, T. F. Krauss
    Abstract:

    We report visible (green) third-harmonic generation in silicon by launching near-infrared picosecond pulses into highly confined photonic crystal waveguides. We demonstrate slow Light Enhancement of this nonlinear process.

  • green Light emission in silicon through slow Light enhanced third harmonic generation in photonic crystal waveguides
    Nature Photonics, 2009
    Co-Authors: Bill Corcoran, Benjamin J. Eggleton, Christian Grillet, C. Monat, David J. Moss, Thomas P. White, Liam Ofaolain, T. F. Krauss
    Abstract:

    Slow Light has attracted significant interest recently as a potential solution for optical delay lines and time-domain optical signal processing1,2. Perhaps even more significant is the possibility of dramatically enhancing nonlinear optical effects3,4 due to the spatial compression of optical energy5,6,7. Two-dimensional silicon photonic-crystal waveguides have proven to be a powerful platform for realizing slow Light, being compatible with on-chip integration and offering wide-bandwidth and dispersion-free propagation2. Here, we report the slow-Light Enhancement of a nonlinear optical process in a two-dimensional silicon photonic-crystal waveguide. We observe visible third-harmonic-generation at a wavelength of 520 nm with only a few watts of peak power, and demonstrate strong third-harmonic-generation Enhancement due to the reduced group velocity of the near-infrared pump signal. This demonstrates yet another unexpected nonlinear function realized in a CMOS-compatible silicon waveguide. The use of slow Light for enhancing a nonlinear optical process in a two-dimensional silicon photonic-crystal waveguide is demonstrated. More specifically, green emission by third-harmonic generation is obtained, highLighting yet another functionality of silicon photonics chips.

  • slow Light Enhancement of nonlinear effects in silicon engineered photonic crystal waveguides
    Optics Express, 2009
    Co-Authors: C. Monat, Benjamin J. Eggleton, Christian Grillet, Bill Corcoran, Thomas P. White, Majid Ebnaliheidari, Liam Ofaolain, T. F. Krauss
    Abstract:

    The support of the Australian Research Council through its Federation Fellow, Centre of Excellence and Discovery Grant programs is gratefully acknowledged. Additional acknowledgement is given to the support of the School of Physics, University of Sydney, through its Denison Foundation and the International Science Linkages program of the Department of Education, Science and Technology.

  • Slow Light enhanced third-harmonic generation in silicon photonic crystal waveguides
    2008 34th European Conference on Optical Communication, 2008
    Co-Authors: C. Monat, T P White, Liam O'faolain, Benjamin J. Eggleton, Christian Grillet, D. J. Moss, B. Corcorran, T. F. Krauss
    Abstract:

    We report visible (green) third-harmonic generation in silicon by launching near-infrared picosecond pulses into highly confined photonic crystal waveguides. We demonstrate slow Light Enhancement of this nonlinear process.

Benjamin J. Eggleton - One of the best experts on this subject based on the ideXlab platform.

  • Slow-Light enhanced Brillouin frequency comb generation on a chip
    2014 Conference on Lasers and Electro-Optics (CLEO) - Laser Science to Photonic Applications, 2014
    Co-Authors: Moritz Merklein, Irina V. Kabakova, Thomas F. S. Buettner, Steven J. Madden, Barry Luther-davies, Duk-yong Choi, Benjamin J. Eggleton
    Abstract:

    We present the experimental observation of the slow-Light Enhancement effect on the generation of a frequency comb formed by stimulated Brillouin scattering (SBS) in a chip scale As2S3 rib waveguide.

  • Ultra-compact, slow Light enhanced, 160Gbaud demultiplexing in a silicon photonic crystal waveguide
    CLEO: 2011 - Laser Science to Photonic Applications, 2011
    Co-Authors: Bill Corcoran, Liam O'faolain, Thomas F. Krauss, C. Monat, Mark D. Pelusi, Juntao Li, Benjamin J. Eggleton
    Abstract:

    We demonstrate error-free de-multiplexing of 160Gbit/s optical data to a 10Gbit/s data stream, exploiting slow Light Enhancement of four-wave mixing in an ultra-compact 96μm long, dispersion engineered silicon photonic crystal waveguide.

  • Slow Light enhanced nonlinear effects in silicon photonic crystal waveguides
    Advances in Optical Sciences Congress, 2009
    Co-Authors: C. Monat, Liam O'faolain, Benjamin J. Eggleton, Christian Grillet, Bill Corcoran, Majid Ebnali-heidari, David J. Moss, Thomas P. White, Thomas F. Krauss
    Abstract:

    We experimentally investigate the slow Light Enhancement of nonlinear effects such as self-phase modulation, two-photon absorption and free carriers, through dispersion-engineered silicon photonic crystal waveguides. We also observe emission of visible Light through third-harmonic generation.

  • Green Light emission in silicon through slow Light enhanced third-harmonic generation in photonic crystal waveguides
    2009 Conference on Lasers and Electro-Optics and 2009 Conference on Quantum electronics and Laser Science Conference, 2009
    Co-Authors: C. Monat, T P White, Liam O'faolain, Brian Corcoran, Benjamin J. Eggleton, Christian Grillet, D. J. Moss, T. F. Krauss
    Abstract:

    We report visible (green) third-harmonic generation in silicon by launching near-infrared picosecond pulses into highly confined photonic crystal waveguides. We demonstrate slow Light Enhancement of this nonlinear process.

  • green Light emission in silicon through slow Light enhanced third harmonic generation in photonic crystal waveguides
    Nature Photonics, 2009
    Co-Authors: Bill Corcoran, Benjamin J. Eggleton, Christian Grillet, C. Monat, David J. Moss, Thomas P. White, Liam Ofaolain, T. F. Krauss
    Abstract:

    Slow Light has attracted significant interest recently as a potential solution for optical delay lines and time-domain optical signal processing1,2. Perhaps even more significant is the possibility of dramatically enhancing nonlinear optical effects3,4 due to the spatial compression of optical energy5,6,7. Two-dimensional silicon photonic-crystal waveguides have proven to be a powerful platform for realizing slow Light, being compatible with on-chip integration and offering wide-bandwidth and dispersion-free propagation2. Here, we report the slow-Light Enhancement of a nonlinear optical process in a two-dimensional silicon photonic-crystal waveguide. We observe visible third-harmonic-generation at a wavelength of 520 nm with only a few watts of peak power, and demonstrate strong third-harmonic-generation Enhancement due to the reduced group velocity of the near-infrared pump signal. This demonstrates yet another unexpected nonlinear function realized in a CMOS-compatible silicon waveguide. The use of slow Light for enhancing a nonlinear optical process in a two-dimensional silicon photonic-crystal waveguide is demonstrated. More specifically, green emission by third-harmonic generation is obtained, highLighting yet another functionality of silicon photonics chips.

Thomas F. Krauss - One of the best experts on this subject based on the ideXlab platform.

  • Ultra-compact, slow Light enhanced, 160Gbaud demultiplexing in a silicon photonic crystal waveguide
    CLEO: 2011 - Laser Science to Photonic Applications, 2011
    Co-Authors: Bill Corcoran, Liam O'faolain, Thomas F. Krauss, C. Monat, Mark D. Pelusi, Juntao Li, Benjamin J. Eggleton
    Abstract:

    We demonstrate error-free de-multiplexing of 160Gbit/s optical data to a 10Gbit/s data stream, exploiting slow Light Enhancement of four-wave mixing in an ultra-compact 96μm long, dispersion engineered silicon photonic crystal waveguide.

  • Slow Light enhanced nonlinear effects in silicon photonic crystal waveguides
    Advances in Optical Sciences Congress, 2009
    Co-Authors: C. Monat, Liam O'faolain, Benjamin J. Eggleton, Christian Grillet, Bill Corcoran, Majid Ebnali-heidari, David J. Moss, Thomas P. White, Thomas F. Krauss
    Abstract:

    We experimentally investigate the slow Light Enhancement of nonlinear effects such as self-phase modulation, two-photon absorption and free carriers, through dispersion-engineered silicon photonic crystal waveguides. We also observe emission of visible Light through third-harmonic generation.

  • Ultra-compact optical switch based on photonic crystal waveguides
    Optical Fibre Communications Conference, 2009
    Co-Authors: Thomas F. Krauss
    Abstract:

    We outline the prospects for ultrafast modulators based on dispersion-engineered photonic crystal waveguides. Due to the slow Light Enhancement, devices of 100-200 micrometers length can be realised that operate over a >10 nm bandwidth.

  • Ultracompact, low-power and ultrafast optical switching based on silicon photonic crystals
    2009 6th IEEE International Conference on Group IV Photonics, 2009
    Co-Authors: Daryl M. Beggs, D. Van Oosten, Matteo Burresi, T P White, Liam O'faolain, Thomas Kampfrath, Thomas F. Krauss, Laurens Kuipers
    Abstract:

    We demonstrate a silicon optical switch that can reroute optical signals within a switching time of just 3 ps. The switch is based on photonic crystal waveguides in a directional coupler geometry. The dispersion of the device has been engineered to provide slow-Light Enhancement, which allows the switching length of the device to be just 5 mum. The 3 ps switching time is demonstrated using free-carriers in the silicon generated by the absorption of a femtosecond laser pulse.

  • Green Light emission in silicon through slow-Light enhanced third-harmonic generation in photonic-crystal waveguides
    Nature Photonics, 2009
    Co-Authors: Brian Corcoran, T P White, Liam O'faolain, Benjamin J. Eggleton, Christian Grillet, C. Monat, D. J. Moss, Thomas F. Krauss
    Abstract:

    Slow Light has attracted significant interest recently as a potential solution for optical delay lines and time-domain optical signal processing1, 2. Perhaps even more significant is the possibility of dramatically enhancing nonlinear optical effects3, 4 due to the spatial compression of optical energy5, 6, 7. Two-dimensional silicon photonic-crystal waveguides have proven to be a powerful platform for realizing slow Light, being compatible with on-chip integration and offering wide-bandwidth and dispersion-free propagation2. Here, we report the slow-Light Enhancement of a nonlinear optical process in a two-dimensional silicon photonic-crystal waveguide. We observe visible third-harmonic-generation at a wavelength of 520 nm with only a few watts of peak power, and demonstrate strong third-harmonic-generation Enhancement due to the reduced group velocity of the near-infrared pump signal. This demonstrates yet another unexpected nonlinear function realized in a CMOS-compatible silicon waveguide.

Junyi Wang - One of the best experts on this subject based on the ideXlab platform.

  • RDGAN: Retinex Decomposition Based Adversarial Learning for Low-Light Enhancement
    2019 IEEE International Conference on Multimedia and Expo (ICME), 2019
    Co-Authors: Junyi Wang
    Abstract:

    Pictures taken under the low-Light condition often suffer from low contrast and loss of image details, thus an approach that can effectively improve low-Light images is demanded. Traditional Retinex-based methods assume that the reflectance components of low-Light images keep unchanged, which neglect the color distortion and lost details. In this paper, we propose an end-to-end learning-based framework that first decomposes the low-Light image and then learns to fuse the decomposed results to obtain the high quality enhanced result. Our framework can be divided into a RDNet (Retinex Decomposition Network) for decomposition and a FENet (Fusion Enhancement Network) for fusion. Specific multi-term losses are respectively designed for the two networks. We also present a new RDGAN (Retinex Decomposition based Generative Adversarial Network) loss, which is computed on the decomposed reflectance components of the enhanced and the reference images. Experiments demonstrate that our approach is good at color and detail restoration, which outperforms other state-of-the-art methods.

  • ICME - RDGAN: Retinex Decomposition Based Adversarial Learning for Low-Light Enhancement
    2019 IEEE International Conference on Multimedia and Expo (ICME), 2019
    Co-Authors: Junyi Wang
    Abstract:

    Pictures taken under the low-Light condition often suffer from low contrast and loss of image details, thus an approach that can effectively improve low-Light images is demanded. Traditional Retinex-based methods assume that the reflectance components of low-Light images keep unchanged, which neglect the color distortion and lost details. In this paper, we propose an end-to-end learning-based framework that first decomposes the low-Light image and then learns to fuse the decomposed results to obtain the high quality enhanced result. Our framework can be divided into a RDNet (Retinex Decomposition Network) for decomposition and a FENet (Fusion Enhancement Network) for fusion. Specific multi-term losses are respectively designed for the two networks. We also present a new RDGAN (Retinex Decomposition based Generative Adversarial Network) loss, which is computed on the decomposed reflectance components of the enhanced and the reference images. Experiments demonstrate that our approach is good at color and detail restoration, which outperforms other state-of-the-art methods.

C. Monat - One of the best experts on this subject based on the ideXlab platform.

  • Ultra-compact, slow Light enhanced, 160Gbaud demultiplexing in a silicon photonic crystal waveguide
    CLEO: 2011 - Laser Science to Photonic Applications, 2011
    Co-Authors: Bill Corcoran, Liam O'faolain, Thomas F. Krauss, C. Monat, Mark D. Pelusi, Juntao Li, Benjamin J. Eggleton
    Abstract:

    We demonstrate error-free de-multiplexing of 160Gbit/s optical data to a 10Gbit/s data stream, exploiting slow Light Enhancement of four-wave mixing in an ultra-compact 96μm long, dispersion engineered silicon photonic crystal waveguide.

  • Slow Light enhanced nonlinear effects in silicon photonic crystal waveguides
    Advances in Optical Sciences Congress, 2009
    Co-Authors: C. Monat, Liam O'faolain, Benjamin J. Eggleton, Christian Grillet, Bill Corcoran, Majid Ebnali-heidari, David J. Moss, Thomas P. White, Thomas F. Krauss
    Abstract:

    We experimentally investigate the slow Light Enhancement of nonlinear effects such as self-phase modulation, two-photon absorption and free carriers, through dispersion-engineered silicon photonic crystal waveguides. We also observe emission of visible Light through third-harmonic generation.

  • Green Light emission in silicon through slow Light enhanced third-harmonic generation in photonic crystal waveguides
    2009 Conference on Lasers and Electro-Optics and 2009 Conference on Quantum electronics and Laser Science Conference, 2009
    Co-Authors: C. Monat, T P White, Liam O'faolain, Brian Corcoran, Benjamin J. Eggleton, Christian Grillet, D. J. Moss, T. F. Krauss
    Abstract:

    We report visible (green) third-harmonic generation in silicon by launching near-infrared picosecond pulses into highly confined photonic crystal waveguides. We demonstrate slow Light Enhancement of this nonlinear process.

  • green Light emission in silicon through slow Light enhanced third harmonic generation in photonic crystal waveguides
    Nature Photonics, 2009
    Co-Authors: Bill Corcoran, Benjamin J. Eggleton, Christian Grillet, C. Monat, David J. Moss, Thomas P. White, Liam Ofaolain, T. F. Krauss
    Abstract:

    Slow Light has attracted significant interest recently as a potential solution for optical delay lines and time-domain optical signal processing1,2. Perhaps even more significant is the possibility of dramatically enhancing nonlinear optical effects3,4 due to the spatial compression of optical energy5,6,7. Two-dimensional silicon photonic-crystal waveguides have proven to be a powerful platform for realizing slow Light, being compatible with on-chip integration and offering wide-bandwidth and dispersion-free propagation2. Here, we report the slow-Light Enhancement of a nonlinear optical process in a two-dimensional silicon photonic-crystal waveguide. We observe visible third-harmonic-generation at a wavelength of 520 nm with only a few watts of peak power, and demonstrate strong third-harmonic-generation Enhancement due to the reduced group velocity of the near-infrared pump signal. This demonstrates yet another unexpected nonlinear function realized in a CMOS-compatible silicon waveguide. The use of slow Light for enhancing a nonlinear optical process in a two-dimensional silicon photonic-crystal waveguide is demonstrated. More specifically, green emission by third-harmonic generation is obtained, highLighting yet another functionality of silicon photonics chips.

  • slow Light Enhancement of nonlinear effects in silicon engineered photonic crystal waveguides
    Optics Express, 2009
    Co-Authors: C. Monat, Benjamin J. Eggleton, Christian Grillet, Bill Corcoran, Thomas P. White, Majid Ebnaliheidari, Liam Ofaolain, T. F. Krauss
    Abstract:

    The support of the Australian Research Council through its Federation Fellow, Centre of Excellence and Discovery Grant programs is gratefully acknowledged. Additional acknowledgement is given to the support of the School of Physics, University of Sydney, through its Denison Foundation and the International Science Linkages program of the Department of Education, Science and Technology.