Results 161 to 170 of about 361 (216)
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Reduction Technique of Differential Propagation Delay with Negative Group Delay Function
2020 14th European Conference on Antennas and Propagation (EuCAP), 2020This paper deals with an innovative technique of propagation delay reduction. The technique is based on the use of bandpass negative group delay (NGD) function. The principle of the propagation delay reduction is introduced by considering a simple scenario of Tx multi-wireless sensors communicating with a single Rx sensor.
Fayu Wan +3 more
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Spectral polarimetry with a differential group delay bias
Optics Letters, 2004We show that the addition of a polarization controller and bias differential group delay to a spectral polarimeter increases the amount of polarization information that can be extracted from a Stokes spectrum measurement. We use this biased spectral polarimetry on 40-Gbit/s signals to measure the polarization mode dispersion of the optical fiber ...
Paul S, Westbrook +3 more
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Renormalization group approach to a class of singularly perturbed delay differential equations
Communications in Nonlinear Science and Numerical Simulation, 2021zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Lin Xu +3 more
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Design of recursive differentiators with constant group-delay characteristics
Signal Processing, 1994zbMATH Open Web Interface contents unavailable due to conflicting licenses.
S. Sunder, V. Ramachandran 0001
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Differential group delay prediction in optical fiber links
Journal of the Optical Society of America A, 2011We simulate the time evolution of differential group delay (DGD) in a fiber link in the hinge model with time series forecasting procedures, in particular, autoregressive (AR) models with Kalman filter, pattern imitation, and a Taylor expansion. In these studies, the furthest prediction horizon was attained with the AR accompanied by the Kalman filter ...
George, Soliman, David, Yevick
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About the Differential Group Delay of Spun Fibers
Journal of Lightwave Technology, 2008It is widely accepted that spinning a fiber while it is drawn is one of the most effective way to reduce its polarization mode dispersion. In this paper, the mean square differential group delay of rapidly, periodically spun fibers is analyzed by means of a theoretical model with a wide range of validity.
GALTAROSSA, ANDREA +2 more
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Optics Communications, 2011
Abstract We propose a novel group delay and differential group delay calibration method for polarization-dependent optical spectral characterization measurements. The calibration method is based on the dispersive nature of stimulated Brillouin scattering and its polarization dependent spectral response. The main advantage of the calibration method is
Mikel Sagues, Alayn Loayssa
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Abstract We propose a novel group delay and differential group delay calibration method for polarization-dependent optical spectral characterization measurements. The calibration method is based on the dispersive nature of stimulated Brillouin scattering and its polarization dependent spectral response. The main advantage of the calibration method is
Mikel Sagues, Alayn Loayssa
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Improved degree of polarization-based differential group delay measurements
Journal of the Optical Society of America A, 2014The time-averaged Stokes vectors obtained after polarization-scrambled light containing multiple, independently polarized frequency components traverses an optical fiber collectively form a surface in Stokes space. The geometry of this surface can be directly related to the polarization mode dispersion of the fiber. This paper examines both numerically
Jason, Pye, David, Yevick
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Dispersion of birefringence and differential group delay in polarization-maintaining fiber
Optics Letters, 2002We present an interferometric technique for measurement of the dispersion of birefringence in polarization-maintaining fibers. The approach yields measurements over a broad spectral range from analysis of single interferograms obtained in a tandem inteferometer. The technique is demonstrated to measure first-, second-, and third-order dispersion of the
Dãânal A, Flavin +2 more
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Optical time-domain differentiation based on intensive differential group delay
Chinese Physics B, 2011An optical time-domain differentiation scheme is proposed and demonstrated based on the intensive differential group delay in a high birefringence fibre waveguide. Results show that the differentiation waveforms agree well with the mathematically calculated derivatives. Both error and efficiency will increase when the birefringence fibre becomes longer,
Zheng-Yong Li +2 more
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