LUO Xiao, HUANG Yong-lin. Simulation research on distributed FBG demodulation system based on CLPG[J]. 2017, 36(1): 45-47. DOI: 10.13873/J.1000-9787(2017)01-0045-03.
transfer-matrix method is used to simulate and analyze the transmission spectra of cascaded long-period fiber gratings( CLPG)
a kind of distributed demodulation system based on CLPG is proposed. The demodulation system uses CLPG as edge filter. Simulation results show that the optical power and the sensing FBG of system are linear in linear range of CLPG. The system can detect 5. 813 × 10-9axial strain sensing signal. The strain sensitivity of the system are-42. 75