We have investigated the possibility to use a step-chirped fiber Bragg grating array for a time-delay-spectrometer. This concept allows a simultaneous spectral and temporal characterization of pulsed light in the nanosecond regime which can also be applied for the investigation of single pulses. A spectral resolution in the 100 picometer range has been achieved and used for the characterization of laser pulses in the nanosecond range.