field (FMF) around the center. The design can be used to obtain FMF both for planar waveguides as well as for fibers. The design can be useful in reducing non-linear effects in fibers.
We present here a refractive index profile design which can enable us to obtain a flat modal field (FMF) around the center. The design can be used to obtain FMF both for planar waveguides as well as for fibers. The design can be useful in reducing non-linear effects in fibers.