The Super Wide Band Light Source provides high spectral density and stable broadband light covering E+S+C+L+U-band or O+E -band. It outputs more than -28 dBm/nm and the power drift over 8 hours is less than ±0.02 dB at room temperature. This super wideband source is excellent for Optical Coherence Tomography (OCT), fiber optic sensing application and components characterization.