The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform

Gary M. Carter - One of the best experts on this subject based on the ideXlab platform.

  • Suppression of Rayleigh-scattering-Induced Noise in OEOs.
    Optics express, 2013
    Co-Authors: Olaoluwa Okusaga, Andrew Docherty, Curtis R. Menyuk, James P. Cahill, Weimin Zhou, Gary M. Carter
    Abstract:

    Optoelectronic oscillators (OEOs) are hybrid RF-photonic devices that promise to be environmentally robust high-frequency RF sources with very low phase Noise. Previously, we showed that Rayleigh-scattering-Induced Noise in optical fibers coupled with amplitude-to-phase Noise conversion in photodetectors and amplifiers leads to fiber-length-dependent Noise in OEOs. In this work, we report on two methods for the suppression of this fiber-length-dependent Noise: altering the amplitude-dependent phase delay of the OEO loops and suppressing the Rayleigh-scattering-Induced Noise in optical fibers. We report a 20 dB reduction in the flicker phase Noise of a 6 km OEO via these suppression techniques.

Olaoluwa Okusaga - One of the best experts on this subject based on the ideXlab platform.

  • Suppression of Rayleigh-scattering-Induced Noise in OEOs.
    Optics express, 2013
    Co-Authors: Olaoluwa Okusaga, Andrew Docherty, Curtis R. Menyuk, James P. Cahill, Weimin Zhou, Gary M. Carter
    Abstract:

    Optoelectronic oscillators (OEOs) are hybrid RF-photonic devices that promise to be environmentally robust high-frequency RF sources with very low phase Noise. Previously, we showed that Rayleigh-scattering-Induced Noise in optical fibers coupled with amplitude-to-phase Noise conversion in photodetectors and amplifiers leads to fiber-length-dependent Noise in OEOs. In this work, we report on two methods for the suppression of this fiber-length-dependent Noise: altering the amplitude-dependent phase delay of the OEO loops and suppressing the Rayleigh-scattering-Induced Noise in optical fibers. We report a 20 dB reduction in the flicker phase Noise of a 6 km OEO via these suppression techniques.

  • Optical scattering Induced Noise in RF-photonic systems
    Proceedings of the IEEE International Frequency Control Symposium and Exposition, 2011
    Co-Authors: Olaoluwa Okusaga, Andrew Docherty, G. M. Carter, W Zhou, Joan Cahill, Curtis R. Menyuk
    Abstract:

    Scattering mechanisms in optical fiber induce Noise in the spectra of optical signals travelling through the fiber. This fiber-Induced Noise limits the quality factor of optical fiber resonators and degrades low-Noise signals transmitted via optical fiber. In this work, we present preliminary data from our systematic study of optical scattering in fiber. We present Noise spectra for Rayleigh and Brillouin scattering. We also demonstrate suppression of these scattering mechanisms via laser frequency modulation.

Curtis R. Menyuk - One of the best experts on this subject based on the ideXlab platform.

  • Suppression of Rayleigh-scattering-Induced Noise in OEOs.
    Optics express, 2013
    Co-Authors: Olaoluwa Okusaga, Andrew Docherty, Curtis R. Menyuk, James P. Cahill, Weimin Zhou, Gary M. Carter
    Abstract:

    Optoelectronic oscillators (OEOs) are hybrid RF-photonic devices that promise to be environmentally robust high-frequency RF sources with very low phase Noise. Previously, we showed that Rayleigh-scattering-Induced Noise in optical fibers coupled with amplitude-to-phase Noise conversion in photodetectors and amplifiers leads to fiber-length-dependent Noise in OEOs. In this work, we report on two methods for the suppression of this fiber-length-dependent Noise: altering the amplitude-dependent phase delay of the OEO loops and suppressing the Rayleigh-scattering-Induced Noise in optical fibers. We report a 20 dB reduction in the flicker phase Noise of a 6 km OEO via these suppression techniques.

  • Optical scattering Induced Noise in RF-photonic systems
    Proceedings of the IEEE International Frequency Control Symposium and Exposition, 2011
    Co-Authors: Olaoluwa Okusaga, Andrew Docherty, G. M. Carter, W Zhou, Joan Cahill, Curtis R. Menyuk
    Abstract:

    Scattering mechanisms in optical fiber induce Noise in the spectra of optical signals travelling through the fiber. This fiber-Induced Noise limits the quality factor of optical fiber resonators and degrades low-Noise signals transmitted via optical fiber. In this work, we present preliminary data from our systematic study of optical scattering in fiber. We present Noise spectra for Rayleigh and Brillouin scattering. We also demonstrate suppression of these scattering mechanisms via laser frequency modulation.

Andrew Docherty - One of the best experts on this subject based on the ideXlab platform.

  • Suppression of Rayleigh-scattering-Induced Noise in OEOs.
    Optics express, 2013
    Co-Authors: Olaoluwa Okusaga, Andrew Docherty, Curtis R. Menyuk, James P. Cahill, Weimin Zhou, Gary M. Carter
    Abstract:

    Optoelectronic oscillators (OEOs) are hybrid RF-photonic devices that promise to be environmentally robust high-frequency RF sources with very low phase Noise. Previously, we showed that Rayleigh-scattering-Induced Noise in optical fibers coupled with amplitude-to-phase Noise conversion in photodetectors and amplifiers leads to fiber-length-dependent Noise in OEOs. In this work, we report on two methods for the suppression of this fiber-length-dependent Noise: altering the amplitude-dependent phase delay of the OEO loops and suppressing the Rayleigh-scattering-Induced Noise in optical fibers. We report a 20 dB reduction in the flicker phase Noise of a 6 km OEO via these suppression techniques.

  • Optical scattering Induced Noise in RF-photonic systems
    Proceedings of the IEEE International Frequency Control Symposium and Exposition, 2011
    Co-Authors: Olaoluwa Okusaga, Andrew Docherty, G. M. Carter, W Zhou, Joan Cahill, Curtis R. Menyuk
    Abstract:

    Scattering mechanisms in optical fiber induce Noise in the spectra of optical signals travelling through the fiber. This fiber-Induced Noise limits the quality factor of optical fiber resonators and degrades low-Noise signals transmitted via optical fiber. In this work, we present preliminary data from our systematic study of optical scattering in fiber. We present Noise spectra for Rayleigh and Brillouin scattering. We also demonstrate suppression of these scattering mechanisms via laser frequency modulation.

Gaojun Mao - One of the best experts on this subject based on the ideXlab platform.

  • flow Induced Noise characterization of pump turbine in continuous and intermittent load rejection processes
    Renewable Energy, 2019
    Co-Authors: Xiuli Mao, Giorgio Pavesi, Diyi Chen, Gaojun Mao
    Abstract:

    Abstract In order to study pump turbine stability in view of flow Induced Noise, this paper focuses on two-part operation of one high head reversible turbine: transient load rejection process and intermittent vane closing conditions. Both above simulations are solved by DES turbulent model, additionally, the flow field results are regarded as sound source and analyzed comparatively by LMS software. Except for flow field interpretation, some developing rules of flow Induced Noise during the period of pump turbine load rejection are found. The result indicates that flow Induced Noise radiation is consistent with internal fluid characteristics, and the developing trends are similar which acquired from these two part calculations, whereas the values are distinct. This work provides a reference for the study of pump turbine operating stability from the acoustic aspect, and for pump turbine design work as well.