The Experts below are selected from a list of 16869 Experts worldwide ranked by ideXlab platform

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

  • versatile multi wavelength ultrafast fiber laser mode locked by carbon nanotubes
    Scientific Reports, 2013
    Co-Authors: Xueming Liu, Chao Zeng, Dong Mao, Yudong Cui, Fengqiu Wang
    Abstract:

    Multi-wavelength lasers have widespread applications (e.g. fiber telecommunications, pump-probe measurements, terahertz generation). Here, we report a nanotube-mode-locked all-fiber ultrafast oscillator emitting three wavelengths at the central wavelengths of about 1540, 1550, and 1560 nm, which are tunable by stretching fiber Bragg gratings. The output pulse duration is around 6 ps with a spectral width of ~0.5 nm, agreeing well with the numerical simulations. The triple-laser system is controlled precisely and insensitive to environmental perturbations with <0.04% Amplitude Fluctuation. Our method provides a simple, stable, low-cost, multi-wavelength ultrafast-pulsed source for spectroscopy, biomedical research and telecommunications.

  • tm doped fiber laser mode locked by graphene polymer composite
    Optics Express, 2012
    Co-Authors: Meng Zhang, Edmund J. R. Kelleher, S V Popov, D Popa, Tawfique Hasan, Felice Torrisi, Fengqiu Wang, Andrea Ferrari, J.r. Taylor
    Abstract:

    We demonstrate mode-locking of a thulium-doped fiber laser operating at 1.94 μm, using a graphene-polymer based saturable absorber. The laser outputs 3.6 ps pulses, with ∼0.4 nJ energy and an Amplitude Fluctuation ∼0.5%, at 6.46 MHz. This is a simple, low-cost, stable and convenient laser oscillator for applications where eye-safe and low-photon-energy light sources are required, such as sensing and biomedical diagnostics.

  • tm doped fiber laser mode locked by graphene polymer composite
    arXiv: Mesoscale and Nanoscale Physics, 2012
    Co-Authors: Meng Zhang, Edmund J. R. Kelleher, S V Popov, D Popa, Tawfique Hasan, Felice Torrisi, Fengqiu Wang, Andrea Ferrari, Zhipei Sun, J.r. Taylor
    Abstract:

    We demonstrate mode-locking of a thulium-doped fiber laser operating at 1.94\mu m, using a graphene-based saturable absorber. The laser outputs 3.6ps pulses, with~0.4nJ energy and an Amplitude Fluctuation~0.5%, at 6.46MHz. This is a simple, low-cost, stable and convenient laser oscillator for applications where eye-safe and low-photon-energy light sources are required, such as sensing and biomedical diagnostics

J.r. Taylor - One of the best experts on this subject based on the ideXlab platform.

  • tm doped fiber laser mode locked by graphene polymer composite
    Optics Express, 2012
    Co-Authors: Meng Zhang, Edmund J. R. Kelleher, S V Popov, D Popa, Tawfique Hasan, Felice Torrisi, Fengqiu Wang, Andrea Ferrari, J.r. Taylor
    Abstract:

    We demonstrate mode-locking of a thulium-doped fiber laser operating at 1.94 μm, using a graphene-polymer based saturable absorber. The laser outputs 3.6 ps pulses, with ∼0.4 nJ energy and an Amplitude Fluctuation ∼0.5%, at 6.46 MHz. This is a simple, low-cost, stable and convenient laser oscillator for applications where eye-safe and low-photon-energy light sources are required, such as sensing and biomedical diagnostics.

  • tm doped fiber laser mode locked by graphene polymer composite
    arXiv: Mesoscale and Nanoscale Physics, 2012
    Co-Authors: Meng Zhang, Edmund J. R. Kelleher, S V Popov, D Popa, Tawfique Hasan, Felice Torrisi, Fengqiu Wang, Andrea Ferrari, Zhipei Sun, J.r. Taylor
    Abstract:

    We demonstrate mode-locking of a thulium-doped fiber laser operating at 1.94\mu m, using a graphene-based saturable absorber. The laser outputs 3.6ps pulses, with~0.4nJ energy and an Amplitude Fluctuation~0.5%, at 6.46MHz. This is a simple, low-cost, stable and convenient laser oscillator for applications where eye-safe and low-photon-energy light sources are required, such as sensing and biomedical diagnostics

Meng Zhang - One of the best experts on this subject based on the ideXlab platform.

  • tm doped fiber laser mode locked by graphene polymer composite
    Optics Express, 2012
    Co-Authors: Meng Zhang, Edmund J. R. Kelleher, S V Popov, D Popa, Tawfique Hasan, Felice Torrisi, Fengqiu Wang, Andrea Ferrari, J.r. Taylor
    Abstract:

    We demonstrate mode-locking of a thulium-doped fiber laser operating at 1.94 μm, using a graphene-polymer based saturable absorber. The laser outputs 3.6 ps pulses, with ∼0.4 nJ energy and an Amplitude Fluctuation ∼0.5%, at 6.46 MHz. This is a simple, low-cost, stable and convenient laser oscillator for applications where eye-safe and low-photon-energy light sources are required, such as sensing and biomedical diagnostics.

  • tm doped fiber laser mode locked by graphene polymer composite
    arXiv: Mesoscale and Nanoscale Physics, 2012
    Co-Authors: Meng Zhang, Edmund J. R. Kelleher, S V Popov, D Popa, Tawfique Hasan, Felice Torrisi, Fengqiu Wang, Andrea Ferrari, Zhipei Sun, J.r. Taylor
    Abstract:

    We demonstrate mode-locking of a thulium-doped fiber laser operating at 1.94\mu m, using a graphene-based saturable absorber. The laser outputs 3.6ps pulses, with~0.4nJ energy and an Amplitude Fluctuation~0.5%, at 6.46MHz. This is a simple, low-cost, stable and convenient laser oscillator for applications where eye-safe and low-photon-energy light sources are required, such as sensing and biomedical diagnostics

P Fortier - One of the best experts on this subject based on the ideXlab platform.

  • a new transmitter receiver architecture for noncoherent multirate offh cdma system with fixed optimal detection threshold
    Journal of Lightwave Technology, 2002
    Co-Authors: Elie Inaty, Hossam M H Shalaby, P Fortier
    Abstract:

    Analyzes a new transmitter-receiver architecture based on a modified version of unipolar-bipolar correlation proposed for a noncoherent multirate optical fast frequency hopping code-division multiple-access (OFFH-CDMA) system. The system assigns a frequency-shifted version (FSV) of the code used to transmit data bit "1" in order to transmit data bit "0." For the original system, we show that due to the nature of the multimedia network, the Fluctuation in the multiple-access interference (MAI) average causes a threshold drift and thus an increase in the probability of error. This paper also provides a stochastic description of the MAI average Amplitude Fluctuation using a predefined multimedia probability density function. A system model is presented; in addition, the signal-to-interference ratio is derived. From the theoretical analysis and numerical results, it is shown that the proposed system has good performance without dynamic estimation of the detection threshold, and thus is independent of both the number of users and the distribution of those users in the offered multimedia classes.

  • a new transmitter receiver architecture for noncoherent multirate offh cdma system with fixed optimal detection threshold
    Global Communications Conference, 2001
    Co-Authors: Elie Inaty, Hossam M H Shalaby, P Fortier
    Abstract:

    This paper analyses a new transmitter-receiver architecture based on a modified version of unipolar-bipolar correlation proposed for noncoherent multirate optical fast frequency hopping CDMA (OFFH-CDMA) system. The system assigns a frequency-shifted version (FSV) of the code used to transmit data bit "1" in order to transmit data bit "0". For the original system, we show that due to the nature of multimedia network, the Fluctuation in the MAI average causes a threshold drift and thus an increase in the probability of error. This paper also provides a stochastic description of the MAI average Amplitude Fluctuation using a predefined multimedia probability density function. A system model is presented. From the theoretical analysis and numerical results, it is shown that the proposed system has good performance without dynamic estimation of the detection threshold, thus is independent of both the number of users and the distribution of those users in the offered multimedia classes.

D Popa - One of the best experts on this subject based on the ideXlab platform.

  • tm doped fiber laser mode locked by graphene polymer composite
    Optics Express, 2012
    Co-Authors: Meng Zhang, Edmund J. R. Kelleher, S V Popov, D Popa, Tawfique Hasan, Felice Torrisi, Fengqiu Wang, Andrea Ferrari, J.r. Taylor
    Abstract:

    We demonstrate mode-locking of a thulium-doped fiber laser operating at 1.94 μm, using a graphene-polymer based saturable absorber. The laser outputs 3.6 ps pulses, with ∼0.4 nJ energy and an Amplitude Fluctuation ∼0.5%, at 6.46 MHz. This is a simple, low-cost, stable and convenient laser oscillator for applications where eye-safe and low-photon-energy light sources are required, such as sensing and biomedical diagnostics.

  • tm doped fiber laser mode locked by graphene polymer composite
    arXiv: Mesoscale and Nanoscale Physics, 2012
    Co-Authors: Meng Zhang, Edmund J. R. Kelleher, S V Popov, D Popa, Tawfique Hasan, Felice Torrisi, Fengqiu Wang, Andrea Ferrari, Zhipei Sun, J.r. Taylor
    Abstract:

    We demonstrate mode-locking of a thulium-doped fiber laser operating at 1.94\mu m, using a graphene-based saturable absorber. The laser outputs 3.6ps pulses, with~0.4nJ energy and an Amplitude Fluctuation~0.5%, at 6.46MHz. This is a simple, low-cost, stable and convenient laser oscillator for applications where eye-safe and low-photon-energy light sources are required, such as sensing and biomedical diagnostics