Results 231 to 240 of about 178,711 (264)

Measurement of low differential group delay and fiber birefringence

Optical Engineering, 2003
We describe the measurement of low differential group delay and fiber birefringence using a commercial polarization analyzer based on a free-space rotating quarter waveplate polarimeter. Stress-induced birefringence is isolated from the 60-cm fiber under test by placing it in a suitably designed fiber chuck.
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Limit on Differential Group Delay Achievable by Space-Time Wave Packets

Conference on Lasers and Electro-Optics, 2020
We investigate the effects of the spectral uncertainty on the maximum differential group delay (DGD) for a finite-energy space-time wave-packet, showing the maximum DGD that can be obtained with respect to a reference pulse at c.
Murat Yessenov, Lam Mach, Basanta Bhaduri, Davood Mardani, H. Esat Kondakci, George K. Atia, Miguel A. Alonso, Ayman F. Abouraddy   +7 more
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Comparison of optical PMD compensation using a variable and fixed differential group delays

Optical Fiber Communication Conference and International Conference on Quantum Information, 2001
Polarization mode dispersion compensation with dynamic tracking is investigated by modeling. An optical compensator using a variable differential group delay can alleviate the local minimum problem and provide superior performance compared to a fixed-delay compensator.
Q. Yu, A.E. Willner
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Study of the frequency autocorrelation of the differential group delay in fibers with polarization mode dispersion

Optics Letters, 2000
We study the frequency autocorrelation of the differential group delay (DGD) in fibers with polarization mode dispersion (PMD). We show that the correlation bandwidth of the DGD is comparable with that of the orientation of the PMD vector. Furthermore, we show that all the most general statistical properties of polarization mode dispersion in long ...
SHTAIF M., MECOZZI, ANTONIO
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Calculation of the mean differential group delay of periodically spun, randomly birefringent fibers

Optics Letters, 2002
Spinning is one of the most effective and well-known ways to reduce polarization mode dispersion of optical fibers. In spite of the popularity of spinning, a detailed theory of spin effects is still lacking. We report an analytical expression for the mean differential group delay of a randomly birefringent spun fiber.
GALTAROSSA, ANDREA, GRIGGIO, PAOLA, PIZZINAT, ANNA, PALMIERI, LUCA   +3 more
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Effect of GPS System Biases on Differential Group Delay Measurements

1988
Abstract : GPS satellite and receiver differential L1/L2 biases induce errors into the GPS derived ionospheric measurements of the total electron content. If these measurements are to be used for ionospheric calibration of other systems or for deriving ionospheric measurements for these and other similar applications.
Clayton Coker, Scott R. Dahike, David S. Coco   +2 more
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Differential Group Delay Measurement in Spun Birefringent Uncoupled Multicore Fibers

2025 European Conference on Optical Communications (ECOC)
Experimental measurements of the local birefringence of spun multi-core fibers are presented and related to differential group delay measurements. Results, supported also by numerical simulations, show how spin can effectively reduce the differential group delay also in multi-core fibers, if properly designed.
Romero Ponce, L. V., Aitkulov, A., Stegmaier, M., Geisler, T., Santagiustina, M., Galtarossa, A., Palmieri, L.   +6 more
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On differential group-delay statistics for polarization-mode dispersion emulators

Journal of Lightwave Technology, 2001
We present a theoretical study on differential group-delay (DGD) statistics for common models of polarization-mode dispersion (PMD) emulators. Our study will show, for the first time to our knowledge, that the statistics for the length of the PMD vector will not necessarily behave as a system with three degrees of freedom when the number of sections in
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Variable differential-group-delay module without second-order PMD

Journal of Lightwave Technology, 2002
We propose a design for a variable differential-group-delay (DGD), formed by concatenation of four identical fixed DGD segments. Due to the symmetry involved, it produces zero second-order polarization mode dispersion (PMD). The generated third-order PMD is half the value of the conventional two-segment concatenation for variable DGD.
P.B. Phua, H.A. Haus
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Timing group delay and differential code bias corrections for BeiDou positioning

Journal of Geodesy, 2015
This article first clearly figures out the relationship between parameters of timing group delay (TGD) and differential code bias (DCB) for BDS, and demonstrates the equivalence of TGD and DCB correction models combining theory with practice. The TGD/DCB correction models have been extended to various occasions for BDS positioning, and such models have
Fei Guo, Xiaohong Zhang, Jinling Wang
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