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Browsing by Author "Mensah, S.Y."

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Polarization instability shift in birefringent single mode optical fibers

Ishiekwene, G.C.; Mensah, S.Y.; Brown, C.S. (University of Cape Coast, 2000)

An intensity-dependent change in ellipticity of an input light beam leads to a characteristic shift in polarization instability. The presence of dichroism gives rise to self-induced ellipticity effect in the polarization ...
Propagation of ultrasonic waves in bulk gallium nitride (gan) semiconductor in the presence of high-frequency electric field

Mensah, S.Y.; Mensah, N.G.; Elloh, V.W.; Banini, G.K.; Sam, Frederick; Allotey, F.K.A. (University of Cape Coast, 2005)

The propagation of ultrasound is studied in bulk GaN semiconductor in the presence of a strong, ac field oscillating at a frequency much higher than that of the ultrasound. Analytical expressions have been obtained for the ...
Soliton excitation in superlattice

Mensah, S.Y.; Allotey, F.K.A.; Mensah, N.G.; Twum, A.K. (University of Cape Coast, 1995-10)

Excitation of soliton in superlattice has been investigated theoretically. It is noted that the soliton velocity u and the length L depend on the amplitude Eo and that an increase in the amplitude causes soliton width L ...
The use of lorentz group formalism in solving polarization effects of a birefringent single mode optical fiber

Ishiekwene, G.C.; Brown, C.S.; Mensah, S.Y.; Bak, A.E. (University of Cape Coast, 2000)

A theoretical analysis on the polarization effects of a light beam propagating in a birefrigent single-mode fiber is presented. We derive a system of differential equations representing the evolution of Stokes parameters ...

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