Abstract
A FBG wavelength demodulation system based on the continuous dynamic scanning of tunable distributed feedback (DFB) laser is put forward and implemented. First, this paper introduces the basic principle of FBG wavelength demodulation system; second, the demodulation algorithm as the key of whole system is realized and compiled into DLL files by using the C programming language, then the Labview program calls for DLL files through a dynamic link library to establish a data processing program, including a interactive data processing interface. Not only it improves the accuracy of FBG wavelength demodulation system, also it helps the subsequent development on the system even though the hardware equipments keep invariant. The results show that the demodulation system has a fine resolution and stability, which can meet the practical requirements and be suited to produce in business and put into use in the engineering.
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