The Experts below are selected from a list of 47325 Experts worldwide ranked by ideXlab platform
Weisheng Hu - One of the best experts on this subject based on the ideXlab platform.
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Brillouin Rectangular Optical Filter With Improved Selectivity and Noise Performance
IEEE Photonics Technology Letters, 2015Co-Authors: Wei Wei, Yves Jaouen, Michel Morvan, Lilin Yi, Weisheng HuAbstract:We demonstrate a high selectivity rectangular Optical Filter based on stimulated Brillouin scattering (SBS) effect in fiber with bandwidth from 1 to 3 GHz. By using pump-splitting dual-stage configuration, the Filter selectivity has been improved by more than 16 dB and exceeded 40 dB within 2-GHz bandwidth. The Filter shape is well controlled by using precise digital feedback compensation and nonlinearity management. We also analyze the noise performance of both the single-stage and dual-stage Filters by evaluating the signal-to-noise ratio of the amplified signal using coherent detection. The results show that the dual-stage approach performs better than the single-stage architecture in achieving higher selectivity and improving noise performance. The inherent tuning flexibility with improved performance makes the proposed SBS Filter one of the best candidates for microwave photonic applications.
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bandwidth tunable narrowband rectangular Optical Filter based on stimulated brillouin scattering in Optical fiber
Optics Express, 2014Co-Authors: Lilin Yi, Yves Jaouen, Weisheng HuAbstract:We propose a rectangular Optical Filter based on stimulated Brillouin scattering (SBS) in Optical fiber with bandwidth tuning from 50 MHz to 4 GHz at less than 15-MHz resolution. The rectangular shape of the Filter is precisely achieved utilizing digital feedback control of the comb-like pump spectral lines. The passband ripple is suppressed to ~1 dB by mitigating the nonlinearity influences of the comb-like pump lines generated in electrical and Optical components and fibers. Moreover a fiber with a single Brillouin peak is employed to further reduce the in-band ripple and the out-of-band SBS gain at the same time. Finally, we analyze the noise performance of the Filter at different bandwidth cases and demonstrate the system performance of the proposed Filter with 2.1-GHz bandwidth and 19-dB gain by amplifying a 2-GHz orthogonal frequency-division-multiplexing (OFDM) signal with quadrature-phase-shift-keying (QPSK) and 16-quadrature-amplitude-modulation (16-QAM) on each subscriber.
Michel Morvan - One of the best experts on this subject based on the ideXlab platform.
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Brillouin Rectangular Optical Filter With Improved Selectivity and Noise Performance
IEEE Photonics Technology Letters, 2015Co-Authors: Wei Wei, Yves Jaouen, Michel Morvan, Lilin Yi, Weisheng HuAbstract:We demonstrate a high selectivity rectangular Optical Filter based on stimulated Brillouin scattering (SBS) effect in fiber with bandwidth from 1 to 3 GHz. By using pump-splitting dual-stage configuration, the Filter selectivity has been improved by more than 16 dB and exceeded 40 dB within 2-GHz bandwidth. The Filter shape is well controlled by using precise digital feedback compensation and nonlinearity management. We also analyze the noise performance of both the single-stage and dual-stage Filters by evaluating the signal-to-noise ratio of the amplified signal using coherent detection. The results show that the dual-stage approach performs better than the single-stage architecture in achieving higher selectivity and improving noise performance. The inherent tuning flexibility with improved performance makes the proposed SBS Filter one of the best candidates for microwave photonic applications.
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Brillouin Rectangular Optical Filter with Improved Selectivity and Noise Performance
IEEE Photonics Technology Letters, 2015Co-Authors: Wei Wei, Yves Jaouen, Michel MorvanAbstract:We demonstrate a high selectivity rectangular Optical Filter based on stimulated Brillouin scattering (SBS) effect in fiber with bandwidth from 1 GHz to 3 GHz. By using pump-splitting dual-stage configuration, the Filter selectivity has been improved by ~15 dB without any distortion of the shape, which is well controlled by using precise digital feedback compensation and nonlinearity management. We also analyze the noise performance of both the single-stage and dual-stage Filter by evaluating the signal-to-noise ratio of the amplified signal using coherent detection. The results show that for achieving higher selectivity and improved noise performance, the dual-stage approach performs better than the single-stage architecture. The inherent tuning flexibility with improved performance makes the proposed SBS Filter one of the best candidates for microwave photonic applications.
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System Performance Evaluation of Stimulated Brillouin Scattering Based Narrowband Rectangular Optical Filter
2014Co-Authors: Wei Wei, Yves Jaouen, Elie Awwad, Michel MorvanAbstract:We propose a narrow band rectangular Optical Filter based on stimulated Brillouin scattering with flexible bandwidth and ~1-dB passband ripple. Only small performance penalty is observed when employing the Filter into the OFDM system.
Yves Jaouen - One of the best experts on this subject based on the ideXlab platform.
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Brillouin Rectangular Optical Filter With Improved Selectivity and Noise Performance
IEEE Photonics Technology Letters, 2015Co-Authors: Wei Wei, Yves Jaouen, Michel Morvan, Lilin Yi, Weisheng HuAbstract:We demonstrate a high selectivity rectangular Optical Filter based on stimulated Brillouin scattering (SBS) effect in fiber with bandwidth from 1 to 3 GHz. By using pump-splitting dual-stage configuration, the Filter selectivity has been improved by more than 16 dB and exceeded 40 dB within 2-GHz bandwidth. The Filter shape is well controlled by using precise digital feedback compensation and nonlinearity management. We also analyze the noise performance of both the single-stage and dual-stage Filters by evaluating the signal-to-noise ratio of the amplified signal using coherent detection. The results show that the dual-stage approach performs better than the single-stage architecture in achieving higher selectivity and improving noise performance. The inherent tuning flexibility with improved performance makes the proposed SBS Filter one of the best candidates for microwave photonic applications.
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Brillouin Rectangular Optical Filter with Improved Selectivity and Noise Performance
IEEE Photonics Technology Letters, 2015Co-Authors: Wei Wei, Yves Jaouen, Michel MorvanAbstract:We demonstrate a high selectivity rectangular Optical Filter based on stimulated Brillouin scattering (SBS) effect in fiber with bandwidth from 1 GHz to 3 GHz. By using pump-splitting dual-stage configuration, the Filter selectivity has been improved by ~15 dB without any distortion of the shape, which is well controlled by using precise digital feedback compensation and nonlinearity management. We also analyze the noise performance of both the single-stage and dual-stage Filter by evaluating the signal-to-noise ratio of the amplified signal using coherent detection. The results show that for achieving higher selectivity and improved noise performance, the dual-stage approach performs better than the single-stage architecture. The inherent tuning flexibility with improved performance makes the proposed SBS Filter one of the best candidates for microwave photonic applications.
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System Performance Evaluation of Stimulated Brillouin Scattering Based Narrowband Rectangular Optical Filter
2014Co-Authors: Wei Wei, Yves Jaouen, Elie Awwad, Michel MorvanAbstract:We propose a narrow band rectangular Optical Filter based on stimulated Brillouin scattering with flexible bandwidth and ~1-dB passband ripple. Only small performance penalty is observed when employing the Filter into the OFDM system.
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bandwidth tunable narrowband rectangular Optical Filter based on stimulated brillouin scattering in Optical fiber
Optics Express, 2014Co-Authors: Lilin Yi, Yves Jaouen, Weisheng HuAbstract:We propose a rectangular Optical Filter based on stimulated Brillouin scattering (SBS) in Optical fiber with bandwidth tuning from 50 MHz to 4 GHz at less than 15-MHz resolution. The rectangular shape of the Filter is precisely achieved utilizing digital feedback control of the comb-like pump spectral lines. The passband ripple is suppressed to ~1 dB by mitigating the nonlinearity influences of the comb-like pump lines generated in electrical and Optical components and fibers. Moreover a fiber with a single Brillouin peak is employed to further reduce the in-band ripple and the out-of-band SBS gain at the same time. Finally, we analyze the noise performance of the Filter at different bandwidth cases and demonstrate the system performance of the proposed Filter with 2.1-GHz bandwidth and 19-dB gain by amplifying a 2-GHz orthogonal frequency-division-multiplexing (OFDM) signal with quadrature-phase-shift-keying (QPSK) and 16-quadrature-amplitude-modulation (16-QAM) on each subscriber.
Hans Zappe - One of the best experts on this subject based on the ideXlab platform.
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Tunable Optical Filter
Lecture Notes in Computational Science and Engineering, 2005Co-Authors: Dennis Hohlfeld, T. Bechtold, Hans ZappeAbstract:A benchmark for the heat transfer problem, related to modeling of a tunable Optical Filter, is presented. It can be used to apply model reduction algorithms to a linear first-order problem.
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an all dielectric tunable Optical Filter based on the thermo optic effect
Journal of Optics, 2004Co-Authors: Dennis Hohlfeld, Hans ZappeAbstract:A MEMS based, thermally tunable Optical Filter, hybridly assembled with a fibre based input/output, is presented. The Filter is based on a Fabry?Perot interferometer employing a silicon cavity and silicon based dielectric Bragg reflectors and is fabricated as a free-standing membrane. The Filter membrane is fixed to the substrate through micromachined suspension arms, which act as a thermal isolation. Wavelength tuning is achieved through thermal modulation of the cavity's Optical thickness using thin film resistors. The Filter characteristics measured were a full width at half-maximum value (FWHM) of 1.19?nm at a wavelength of 1530?nm and a finesse exceeding?1000. The tuning efficiency of a single-cavity Filter with Bragg mirrors based on silicon nitride and silicon dioxide was measured to be 51.9?pm?K?1. Measurements of static and transient electrothermal behaviour were performed on Filter membranes, resulting in maximum temperatures of 700??C and thermal time constants of 5.14?ms. The assembly technique relied on the alignment of Optical fibres with the Filter array using a novel silicon Optical bench approach.
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A thermally tunable, silicon-based Optical Filter
2003Co-Authors: Dennis Hohlfeld, M. Epmeier, Hans ZappeAbstract:A novel silicon MEMS-based concept for tunable Optical Filters used in wavelength-division multiplexing (WDM) systems is presented. Such a Filter is essential for monitoring and reconfiguring Optical networks. The device is based on a Fabry-Perot interferometer employing a silicon cavity and silicon-based dielectric Bragg mirrors and is fabricated as a free-standing membrane. Wavelength tuning is achieved through thermal modulation of the resonator's Optical thickness. Measurement of Optical Filter performance and tunability as well as numerical simulation results of its steady-state and transient thermal behavior are presented.
K Kikuchi - One of the best experts on this subject based on the ideXlab platform.
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narrowband Optical Filter with a variable transmission spectrum using stimulated brillouin scattering in Optical fiber
Optics Letters, 2002Co-Authors: Takuo Tanemura, Yuichi Takushima, K KikuchiAbstract:A novel shape-adjustable narrowband Optical Filter utilizing stimulated Brillouin scattering in an Optical fiber is proposed and demonstrated. In this scheme, binary-phase-shift-keying modulation is applied to the pump wave to broaden and shape the Brillouin gain spectrum. By choosing an appropriate modulation data pattern, we realized a flat-top steep-cutoff Optical bandpass Filter with a 3-dB bandwidth of 1.5 GHz and a 10-dB bandwidth of 2 GHz is realized. In addition, a tunable Optical notch Filter is also realized by deamplification of the anti-Stokes wave.
