In photonic integrated circuits (PICs), one of the most crucial building blocks is optical waveguide couplers, which are usually utilized in Mach-Zehnder interferometer-based devices, for instance, power monitors, filters, and N-by-N optical switches.Such devices’ responses are needed to be wavelength insensitively for increment the operating bandwidths, particularly more than the C+L band for real-time applications (the wavelength’s spectral range = 1530 - 1630 nm). Hence, an optical waveguide coupler including a precise and broadband is necessary. In the platform of silicon-on-insulator (SOI), the typical directional couplers have containedtwo parallel waveguides and are broadly utilized in PICs due to their compactness and integrability. To achieve effectiveness in broadband optical waveguide coupler, a new design has been proposed in this work. For optimally designing broadband optical waveguide coupler, Social Spider Optimization algorithm is utilized. The proposed approach is implemented in the platform of MATLAB. And the simulated results have shown that the proposed approach has provided a better Optimal Design of Broadband Optical Waveguide Coupler than the existing approach.