Results 301 to 310 of about 764,271 (345)

Describing spatiotemporal couplings in ultrashort pulses using coupling coefficients

Chinese Physics B, 2011
Three coupling coefficients are defined to describe spatiotemporal coupling in ultrashort pulses. With these coupling coefficients, the first-order spatiotemporal couplings of Gaussian pulse and beam are described analytically. Also, the first-order and the second-order spatiotemporal couplings caused by angular dispersion elements are studied using ...
Shu-Guang Zeng, You-Quan Dan, Bin Zhang, Nian-Chun Sun, Zhan Sui   +4 more
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Coupling coefficients for trapezoidal gratings

IEEE Journal of Quantum Electronics, 1988
Using coupled-mode theory, the coupling coefficient was calculated for a trapezoid grating, and it was shown that it is possible to adjust its shape to obtain a high coupling coefficient. This is one of the advantages offered by the ion beam etching technique. >
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The impact of laterally coupled grating microstructure on effective coupling coefficients

Nanotechnology, 2010
Lithographic fabrication may be used to define laterally coupled gratings of high refractive index contrast on waveguide ridges, eliminating the need for regrowth steps in such distributed feedback lasers. These may be made more amenable to fabrication by employing higher-order gratings.
R, Millett, K, Hinzer, A, Benhsaien, T J, Hall, H, Schriemer   +4 more
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Coupling coefficients for space groups

Journal of Mathematical Physics, 1979
Unitary matrices connecting coupling with their corresponding Clebsch–Gordan coefficients are determined quite generally for nonsymmorphic space groups which contain the inversion as point group operation. The matrix elements of these unitary matrices factorize into two independent parts where a special choice for the sets of the left coset ...
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Coupling coefficients for the marcasite structure

Journal of Physics C: Solid State Physics, 1981
Clebsch-Gordan coefficients are calculated for the irreducible representations in the marcasite structure.
H Kunert, M Zimpel
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Reflection coefficients of oversized coupling holes

International Journal of Infrared and Millimeter Waves, 1985
Very simple analytical expressions are proposed for the reflection coefficients of coupling holes used in FIR waveguide lasers. The relations are carried out for dielectric and metallic circular waveguides.
D. Pasquet, J. L. Gautier, P. Pouvil
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Invariants of electromechanical coupling coefficients in piezoceramics

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2003
The relationships between coefficients of electromechanical coupling (CEMC) of various types of piezoceramic resonator (PR) vibrations are considered. Being constant for a given piezoceramic state, the range of variation of piezoceramics dielectric permittivity from a mechanically "free" condition at relatively low frequencies up to an "overall clamped"
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Coupling Coefficient of Irregular Microstrip Resonators

Radiophysics and Quantum Electronics, 2000
We prove the equivalence of the resonance and energetic definitions of the coupling coefficient in the case of irregular microstrip resonators. Formulas for calculation of the coupling coefficient of microstrip resonators with stepped width of the strip conductor are derived.
B. A. Belyaev, M. M. Titov, V. V. Tyurnev   +2 more
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Computing coupling coefficients in transmission systems

SPIE Proceedings, 1998
A numerical method for simulating realistic problems of mode coupling in optical transmission systems is described. The conclusion concerning waveguided propagation of the electromagnetic field in complex structures, selective mode excitation and the power transfer may become an important factor in designing and connecting devices used in optical ...
Violeta Calian, Marcela Ursache, Cristian Sarpe-Tudoran, Margareta Socaciu   +3 more
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Choosing Coefficient of Coupling for Coupled SIDO Converters

IEEE Journal of Emerging and Selected Topics in Industrial Electronics, 2022
Gayatri Nayak, Shabari Nath
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