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    Exact gain of Brillouin fiber amplifiers in the regime of pump depletion
    (Optica Publishing Group, 2025) Gokhan, Fikri Serdar
    Thanks to the LambertW function, the gain of a Brillouin fiber amplifier operating in the depleted pump regime is solved numerically using the Newton-Raphson method. Unlike traditional boundary value problem solvers, which rely on shooting or relaxation techniques and often pose challenges such as high computational complexity and convergence issues, the Newton-Raphson method offers a simpler and more efficient numerical approach. The result obtained can be used to optimize the performance of Brillouin fiber amplifiers. (c) 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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    Öğe
    Extracting hidden stress components of gain spectrum in distributed Brillouin sensing
    (Elsevier Science Inc, 2021) Gokhan, Fikri Serdar
    A simple approach is proposed for determining peak frequencies, stress heights, stress lengths, full-width at halfmaximum (FWHM), broadening and symmetry properties, of a composite Brillouin Gain Spectrum (BGS) which is obtained for the pulse lengths longer than the embedded stress lengths. The composite BGS is thus reconstructed in terms of extracted components. It is validated that the method is successful in determining every level of stress peaks and heights embedded in composite BGS.