This paper presents the modeling and simulation of an optical fiber Bragg grating for maximum reflectivity, minimum side lobe. Optiwave software can be used in different industries and applications, including Fiber Optic Communication, Sensing, Pharma/Bio, Military & Satcom, Test & Measurement, Fundamental Research, Solar Panels, Components / Devices, etc. The simulated fiber gratings with different lengths. We will show here how FIMMPROP can be used to model fiber Bragg gratings. Design of fiber Bragg grating B (left) XY cross-section (right) YZ. In this topic, we demonstrate how to simulate fiber Bragg grating (FBGs) using MODE'. The FBG is constructed with an effective index of 1. 5, and a periodic variation of 1e-3 in the refractive index of the core of a step-index fiber. The refractive index contrast, as well as the pitch and duty. Sol Photonics has bundled years of experience of Fiber Grating design and manufacturing into an easy to use software package which we named GDS (short for Grating Design Software). GDS is intuitively easy to use with just two separate Graphical User Interface (GUI) windows and a limited amount of. Optimize the performance of your photonic applications with RSoft GratingMOD CMT, a general design tool that rapidly simulates complicated grating profiles in optical fibers and integrated waveguide circuits.