The large scale fiber grating array sensing system has found lots of applications in fields distributed in underwater, land, sky and space, which is often configured using TDM/WDM multiplexing schemes. In recent years, the integrated fabrication method without any fiber splicing points plays important roles in providing the largest system high reliability and robust detection performance. However, in such fiber grating array, the synthesis of fiber grating array without bringing any damage becomes a difficult problem. The existing reconstruction algorithms are only used for single fiber bragg grating.This paper will start with the fiber grating array which is formed by two low reflectivity FBGs and regarded as a special chirp fiber grating, then a proposal of synthesis the fiber grating array in time domain is presented, which can also suppress the multi-reflections induced signal crosstalk. The research results will provide a solution to the synthesis of the integrated fiber grating array and a new signal processing method to suppress the array signal crosstalk.
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