Utafutaji Journals articles kwa Mwandishi "1f799f42-57a4-4d8d-b1a5-c11332ea026a"
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20 G bps Pulse Amplitude Modulation (PAM) Format for Capacity Upgrade in Optical Communications
Kipkoech, Yegon; et. al... (American Journal of Optics and Photonics., 2019)In the fast growing society, communication is broadening so rapidly such that internet users need to access information rapidly and amount of data flowing through internet is very huge. Various ... -
Ab initio insights into Graphene-Zirconium disulfide/diselenide heterostructure as electrode material for alkali-ion batteries
King’ori, Gladys W.; et. al... (Surfaces and interfaces, 2021)In the search for an energy storage medium with higher electronic conductivity, rate performance and moderate volume expansion, van der Waals heterostructures are a promising alternative. Herein, the potential of graphene ... -
Computation of the Expectation Value of the Electron – Phonon and Coulomb Interaction Hamiltonian using Second Quantization and Many Body Techniques
Ingosi, A.; et al. (International Journal of Research and Analytical Reviews (IJRAR), 2020-12)The problem of the strong electron coupling in the theory of superconductivity has been discussed in many studies on the basis of electron and phonon spectral functions. For the rationale of investigating the effect of ... -
Design of simultaneous multicolor coherent light generation in a single MgO:PPLN bulk crystal
Choge, Dismas K.; et al. (Journal of the Optical Society of America B, 2020-11)We report on simultaneous sum-frequency mixing and doubling of C-band and 980 nm laser sources using a single segmented periodically poled lithium niobate (PPLN) crystal in a single-pass configuration. Our theoretical analysis ... -
Frequency stability characterization: DFB laser and Raman pump performance on a distributed clock signal over 24.69 km fiber
Osiemo, D. M.; et al. (Journal of the Optical Society of America, 2020-07)Distribution of timing and frequency signals in a fast-changing world requires unprecedented levels of stability for characterization.Transfer of frequency references over long distance without introducing any additional ... -
Hardness characterization parameters of Niobium Carbide and Niobium Nitride: A first principles study
Muchiri, P. W.; et.al. (Elsevier, 2019)Niobium carbides and nitrides have been proposed as potential candidates for hardness and related applications, however, comprehensive studies are still needed for better understanding that may pave way for their ... -
INCOMMENSURATE CRYSTALLIZATION OF NEUTRON MATTER IN NEUTRON STARS
Khanna, Kapil M.; et. al... (EAST EUROPEAN JOURNAL OF PHYSICS, 2020)The composition of the neutron stars from its surface region, outer-core, inner-core, and to its center is still being investigated. One can only surmise on the properties of neutron stars from the spectroscopic data ... -
Integrated extended reach VCSEL interconnect with 8.5 Gbps data modulated forward Raman pump signals
Isoe, G. M.; et. al... (JOURNAL OF MODERN OPTICS, 2019)We experimentally present thefirst reported integrated cross-modulatedforward Raman pump, with low-cost, power-efficient VCSELs. A single-mode VCSEL is directly modulated with 8.5 Gbps data and transmitted over a 50.7 ... -
Landau Criteria of Superfluidity of Two Component Mixture of Bosons
Namwetako, Jophine S.; et. al... (International Journal of Recent Research Aspects, 2020)Using the quasi-particle energy of a mixture of two-component gas of bosons which is assumed to be in a superfluid state, the Landau criterion for superfluidity has been applied to obtain the magnitude of the Landau’s ... -
Mechanical and Elastic Properties of Selected 211 MAX Phases: A Density Functional Theory Study
ARUSEI, Geoffrey; et al. (Kabarak Journal of Research & Innovatio, 2023-10)MAX Phases are a class of ternary materials that have continued to play a greater role in the field of materials science due to their unique properties that bridge the gap between metals and ceramics which have uses in ... -
Modulated Raman pump for integrated VCSEL-based reach enhancement and clock tone dissemination in optical communication
Osiemo, D.M.; et. al... (Elsevier, 2019)The fast growth of data traffic in access networks calls for high speed and low-cost optical links. To extend reach for users in metro areas requires optical amplification of the signal carrying data. In this paper ...