%0 Journal Article %T Theoretical and empirical comparison of coupling coefficient and refractive index estimation for coupled waveguide fiber %A Toto Sakioto %A Jalil Ali %A R osly Abdul Rahman %A Mohamed Fadhali %J Journal of Applied Science and Engineering Technology %D 2008 %I %X Power transmission and coupling of coupled waveguidefibers are affected on the coupling coefficient. The coupling coefficients obtained in experimental results vary in widely. The coupling coefficients have a function of separation of fiber axis and refractive index of core and cladding. For the empirical formula,coupling coefficient is calculated from experimentalresult of coupling ratio distribution from 1% until 75%. Theoretically, the coupling coefficient has a dependence of some parameters resulting in a sinusoidal curve. Both empirical and theoretical formulae are compared to obtain new phenomena of the refractive index of fibers after fusion. %K Coupling coefficient %K Coupling ratio %K Refractive index %K Single mode fiber %U http://library.rit.edu/oajournals/index.php/jaset/article/viewFile/127/133