The Experts below are selected from a list of 8790 Experts worldwide ranked by ideXlab platform
Herbert Haunstein - One of the best experts on this subject based on the ideXlab platform.
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optical polarization mode Dispersion Compensators for high speed optical communication systems
Bell Labs Technical Journal, 2010Co-Authors: Chongjin Xie, Dieter Werner, Herbert Haunstein, R M Jopson, S Chandrasekhar, Xiang Liu, Yan Shi, Siegfried Gronbach, Thomas Fred Link, Konrad CzotscherAbstract:This paper details and describes optical polarization mode Dispersion Compensators (PMDCs) for high-speed optical communication systems. We begin with a general discussion of the PMDC, including its operating principle, practical implementation considerations, and its performance evaluation methods. We then describe an optical PMDC with fast tracking speed for a 40 Gb/s non-return-to-zero differential phase shift keying (NRZ-DPSK) system. The performance of the PMDC is tested in both back-to-back operation and a 1,100 km transmission system. Back-to-back measurements show that the PMDC can increase the polarization mode Dispersion tolerance of a 40 Gb/s NRZ-DPSK system to about an 8 ps mean differential group delay at an optical signal-to-noise ratio (OSNR) margin of less than 1.5 dB. It is able to track principal state of polarization changes as fast as 45°/ms. Fiber nonlinear effects on the PMDC are investigated in the 1,100 km transmission system with neighboring 10 Gb/s on-off keying (OOK) channels with 50 GHz channel spacing. Applications of the optical PMDC to other modulation formats such as differential quadrature phase shift keying (DQPSK) are also discussed. e 2010 Alcatel-Lucent.
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dynamic performance and speed requirement of polarization mode Dispersion Compensators
Journal of Lightwave Technology, 2006Co-Authors: Chongjin Xie, Dieter Werner, Herbert HaunsteinAbstract:To study the dynamic performance of a polarizationmode-Dispersion compensator (PMDC), a continuous PMD model and a dynamic PMDC model are presented. The continuous PMD model generates continuous PMD and state of polarization (SOP) variations. The statistics of the SOP variation generated by the continuous PMD model follows the Rayleigh distribution, and the SOP variation amplitude scales with the square root of sampling-time interval. The results are compared with those of a numerical and a commercial polarization scrambler, and the difference of the SOP variation characteristics between the PMD model and the polarization scramblers is explained. The continuous PMD model and the dynamic PMDC model are used to study the dynamic performance and speed requirement of a two-stage PMDC. The speed requirement of the PMDC is quantified in the SOP variation in one PMDC loop cycle. The authors found that when the SOP variation is within 3deg in one PMDC loop cycle, the dynamic PMD and SOP changes virtually does not cause any degradation in the PMDC performance
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optimum length of one stage polarization mode Dispersion Compensators with a fixed delay line
IEEE Photonics Technology Letters, 2003Co-Authors: Chongjin Xie, Herbert HaunsteinAbstract:We investigate the performance of the one-stage polarization-mode Dispersion (PMD) compensator with a fixed delay line. We find that there exists an optimum delay line length for the PMD compensator and the optimum delay line length decreases with the increase of signal bandwidths. We show that such PMD Compensators, when optimized, can achieve almost the same performance as that achieved by those with a variable delay line.
Xuewen Shu - One of the best experts on this subject based on the ideXlab platform.
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optically controlled tunable Dispersion Compensators based on pumped fiber gratings
Optics Letters, 2011Co-Authors: Xuewen Shu, Kate Sugden, Ian BennionAbstract:We demonstrate optically tunable Dispersion Compensators based on pumping fiber Bragg gratings made in Er/Yb codoped fiber. The tunable Dispersion for a chirped grating and also a uniform-period grating was successfully demonstrated in the experiment. The Dispersion of the chirped grating was tuned from 900 to 1990 ps/nm and also from -600 to -950 ps/nm in the experiment.
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optically tuning of chromatic Dispersion Compensators
International Conference on Computer Communications, 2011Co-Authors: Xuewen ShuAbstract:We present a new tuning method for chromatic Dispersion Compensators, which can be optically tunable. The Dispersion Compensators were made in Er/Yb co-doped fiber and were pumped with 980nm laser diodes. The tunable Dispersion for a chirped grating and also a uniform-period grating was successfully demonstrated in the experiment.
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ICAIT - Optically tuning of chromatic Dispersion Compensators
International Conference on Advanced Infocomm Technology 2011 (ICAIT 2011), 2011Co-Authors: Xuewen ShuAbstract:We present a new tuning method for chromatic Dispersion Compensators, which can be optically tunable. The Dispersion Compensators were made in Er/Yb co-doped fiber and were pumped with 980nm laser diodes. The tunable Dispersion for a chirped grating and also a uniform-period grating was successfully demonstrated in the experiment.
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transmissive in fiber fabry perot etalons as tunable Dispersion Compensators and Dispersion slope Compensators
Optics Letters, 2003Co-Authors: Xuewen Shu, Kate SugdenAbstract:We report for what is believed to be the first time the use of transmissive fiber Bragg grating-based Fabry-Perot etalons for tunable Dispersion compensation and Dispersion-slope compensation. The resulting device has a number of advantages, such as low cost, ease of fabrication, full optical fiber compatibility, and simplicity.
Chongjin Xie - One of the best experts on this subject based on the ideXlab platform.
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optical polarization mode Dispersion Compensators for high speed optical communication systems
Bell Labs Technical Journal, 2010Co-Authors: Chongjin Xie, Dieter Werner, Herbert Haunstein, R M Jopson, S Chandrasekhar, Xiang Liu, Yan Shi, Siegfried Gronbach, Thomas Fred Link, Konrad CzotscherAbstract:This paper details and describes optical polarization mode Dispersion Compensators (PMDCs) for high-speed optical communication systems. We begin with a general discussion of the PMDC, including its operating principle, practical implementation considerations, and its performance evaluation methods. We then describe an optical PMDC with fast tracking speed for a 40 Gb/s non-return-to-zero differential phase shift keying (NRZ-DPSK) system. The performance of the PMDC is tested in both back-to-back operation and a 1,100 km transmission system. Back-to-back measurements show that the PMDC can increase the polarization mode Dispersion tolerance of a 40 Gb/s NRZ-DPSK system to about an 8 ps mean differential group delay at an optical signal-to-noise ratio (OSNR) margin of less than 1.5 dB. It is able to track principal state of polarization changes as fast as 45°/ms. Fiber nonlinear effects on the PMDC are investigated in the 1,100 km transmission system with neighboring 10 Gb/s on-off keying (OOK) channels with 50 GHz channel spacing. Applications of the optical PMDC to other modulation formats such as differential quadrature phase shift keying (DQPSK) are also discussed. e 2010 Alcatel-Lucent.
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suppression of inter channel nonlinearities in wdm coherent pdmqpsk systems using periodic group delay Dispersion Compensators
European Conference on Optical Communication, 2009Co-Authors: Chongjin XieAbstract:We show that periodic-group-delay Dispersion Compensators can significantly suppress inter-channel nonlinearities in a WDM coherent polarization-division-multiplexed quardrature-phase-shift-keying system and make systems with Dispersion management have higher nonlinear tolerance than those with only electronic Dispersion compensation.
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dynamic performance and speed requirement of polarization mode Dispersion Compensators
Journal of Lightwave Technology, 2006Co-Authors: Chongjin Xie, Dieter Werner, Herbert HaunsteinAbstract:To study the dynamic performance of a polarizationmode-Dispersion compensator (PMDC), a continuous PMD model and a dynamic PMDC model are presented. The continuous PMD model generates continuous PMD and state of polarization (SOP) variations. The statistics of the SOP variation generated by the continuous PMD model follows the Rayleigh distribution, and the SOP variation amplitude scales with the square root of sampling-time interval. The results are compared with those of a numerical and a commercial polarization scrambler, and the difference of the SOP variation characteristics between the PMD model and the polarization scramblers is explained. The continuous PMD model and the dynamic PMDC model are used to study the dynamic performance and speed requirement of a two-stage PMDC. The speed requirement of the PMDC is quantified in the SOP variation in one PMDC loop cycle. The authors found that when the SOP variation is within 3deg in one PMDC loop cycle, the dynamic PMD and SOP changes virtually does not cause any degradation in the PMDC performance
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efficiency of different feedback signals for polarization mode Dispersion Compensators
Optical Fiber Communication Conference, 2004Co-Authors: Chongjin Xie, R M Jopson, L Moller, A H GnauckAbstract:The efficiency of different feedback signals for PMD Compensators in systems with different modulation formats is studied and compared. We show that the efficiency of some feedback signals has a strong dependence on modulation formats.
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optimum length of one stage polarization mode Dispersion Compensators with a fixed delay line
IEEE Photonics Technology Letters, 2003Co-Authors: Chongjin Xie, Herbert HaunsteinAbstract:We investigate the performance of the one-stage polarization-mode Dispersion (PMD) compensator with a fixed delay line. We find that there exists an optimum delay line length for the PMD compensator and the optimum delay line length decreases with the increase of signal bandwidths. We show that such PMD Compensators, when optimized, can achieve almost the same performance as that achieved by those with a variable delay line.
William L Kath - One of the best experts on this subject based on the ideXlab platform.
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A Comparative Study of Single-Section Polarization-Mode Dispersion Compensators
2015Co-Authors: Curtis R. Menyuk, William L KathAbstract:Abstract—This paper shows how to use multiple importance sampling to study the performance of polarization-mode disper-sion (PMD) Compensators with a single differential group delay (DGD) element. We compute the eye opening penalty margin for compensated and uncompensated systems with outage probabili-ties of 10 5 or less with a fraction of the computational cost re-quired by standard Monte Carlo methods. This paper shows that the performance of an optimized compensator with a fixed DGD el-ement is comparable to that of a compensator with a variable DGD element. It also shows that the optimal value of the DGD compen-sator is two to three times larger than the mean DGD of the trans-mission line averaged over fiber realizations. This technique can be applied to the optimization of any PMD compensator whose dom-inant sources of residual penalty are both the DGD and the length of the frequency derivative of the polarization-Dispersion vector. Index Terms—Birefringence, compensation, optical communi-cations, optical fiber polarization, polarization-mode Dispersion (PMD). I
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a comparative study of single section polarization mode Dispersion Compensators
Journal of Lightwave Technology, 2004Co-Authors: I T Lima, Curtis R. Menyuk, Gino Biondini, A O Lima, William L KathAbstract:This paper shows how to use multiple importance sampling to study the performance of polarization-mode Dispersion (PMD) Compensators with a single differential group delay (DGD) element. We compute the eye opening penalty margin for compensated and uncompensated systems with outage probabilities of 10/sup -5/ or less with a fraction of the computational cost required by standard Monte Carlo methods. This paper shows that the performance of an optimized compensator with a fixed DGD element is comparable to that of a compensator with a variable DGD element. It also shows that the optimal value of the DGD compensator is two to three times larger than the mean DGD of the transmission line averaged over fiber realizations. This technique can be applied to the optimization of any PMD compensator whose dominant sources of residual penalty are both the DGD and the length of the frequency derivative of the polarization-Dispersion vector.
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analysis of polarization mode Dispersion Compensators using importance sampling
Optical Fiber Communication Conference, 2001Co-Authors: I T Lima, Gino Biondini, B S Marks, William L Kath, Curtis R. MenyukAbstract:We use importance sampling to analyze polarization-mode Dispersion (PMD) Compensators that consist of a single differential-group delay (DGD) element. Using this technique we show that while these Compensators improve the average penalty due to PMD, they may degrade the outage probability.
Dan M Marom - One of the best experts on this subject based on the ideXlab platform.
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generation of wdm adaptive rate pulse bursts by cascading narrow wideband tunable optical Dispersion Compensators
Optics Letters, 2012Co-Authors: David Sinefeld, Yiska Fattal, Dan M MaromAbstract:We demonstrate passive generation of optical pulse trains with each pulse having distinct center carrier and spectra using tunable group delay (GD) staircase transfer functions. The GD steps result from opposite and equal magnitude GD slopes from narrowband and wideband tunable optical Dispersion Compensators. We use this technique to split the spectrum of a femtosecond pulse to a pulse burst with precise control of pulse time separation.