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In this paper, an improved multi-carrier generation scheme based on single-side-band recirculating frequency shifter with optical finite impulse response (FIR) filter for amplified spontaneous emission (ASE) noise suppression is proposed and experimentally demonstrated. The carrier-to-noise-ratio (CNR) instead of tone-to-noise-ratio (TNR) is introduced to more reasonably and exactly evaluate the signal-to-noise-ratio of a multi-carrier source with non-flat noise floor. We have experimentally attain the worst case CNR of 22.5dB and 19.1dB for generated 50 and 69 flat low noise carriers, which has shown significant improvement than the previous cited works based on recirculating frequency shifter.

In this article, nanofluid rheology with slip effects over a convective wall is staggeringly examined. The simultaneous effects of non-linear thermal radiations and internal heat generation/absorption properties are taken into the account. The hydro-magnetic flow in the presence of a porous medium, thermophoresis and Brownian motion effects are analyzed. Mathematical modelling of the fluid dynamic system has been performed in order to obtain the governing relations of the problem. Numerical solutions for the velocity, temperature and mass fraction profiles have been determined using the finite-difference method (FDM) based numerical computing. Various graphical and numerical illustrations for several parameters have been presented in order to investigate physics behind the mathematical equations.

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