Results 221 to 230 of about 178,711 (264)
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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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Low-Differential-Mode-Group-Delay 9-LP-Mode Fiber
Journal of Lightwave Technology, 2015We report the optimization of a few-mode fiber, adapted to multiple-input multiple-output mode division multiplexing, that supports 9 LP modes (15 spatial modes). The fiber is fabricated using standard multimode processes, which allows for tight process tolerances, yielding low differential mode group delays (2) and low bend losses.
Sillard, P. +7 more
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About the Differential Group Delay of Spooled Spun Fibers
National Fiber Optic Engineers Conference, 2012We numerically and experimentally analyze spooled spun fibers showing that spin and bending birefringence interact, originating peculiar PMD behavior. Actually, DGD of spooled spun fibers may be larger than that of the equivalent unspun fibers.
PALMIERI, LUCA +2 more
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Variability of GPS satellite differential group delay biases
IEEE Transactions on Aerospace and Electronic Systems, 1991An important issue in determining the accuracy of global positioning system (GPS) satellite ionospheric measurements is the instrumental delay biases between the L-band frequencies in both the satellites and the receivers. These differential L1-L2 biases must be measured and removed from the GPS measurements before an accurate estimate of the total ...
D.S. Coco +3 more
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The long-term distribution of differential group delay in a recirculating loop
Technical Digest: Symposium on Optical Fiber Measurements, 2004., 2004It is well known that the distribution of differential group delay (DGD) in a straight-line optical fiber transmission system is a Maxwellian when the fiber realization drifts ergodically and the fiber is statistically homogeneous [I].
null Hai Xu +5 more
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Group classification of second-order delay ordinary differential equations
Communications in Nonlinear Science and Numerical Simulation, 2010zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Pue-On, P., Meleshko, S. V.
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Optical solitons with differential group delay by trial equation method
Optik, 2018Abstract This paper secures bright, dark and singualr soliton solutions in birefringent fibers. Both Kerr law and parabolic law nonlinearity are studied. The trial equation method successfully retrieves these solitons with constraint relations that assure their existence.
Anjan Biswas +5 more
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Closely Packed Multicore Fibers with Zero Differential Group Delay
2013 18th OptoElectronics and Communications Conference held jointly with 2013 International Conference on Photonics in Switching, 2013There exists a simple approximate condition for general homogeneous multicore fibers to achieve zero differential group delay (DGD). The zero-DGD wavelength can be controlled effectively by introducing a refractive-index dip in the cores.
Kin Seng Chiang, Min Liu, Yan Qian
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Atmospheric oxygen concentration determination by the differential group delay method
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 1996Abstract The atmospheric component concentration is usually determinated by the differential absorption (DA) method using spectral absorption lines of the components. It is known that the relationship between absorption and the phase refractive index (PRI) of medium is given by the Kramers-Kronig ratio. The maximal difference of PRI near the spectral
Yuri Galkin, Victor Kharchenko
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