Xie Yang, Liu Jianfu, Yao Guozhen, et al. Effects of transmission delay on fiber grating demodulation accuracy[J]. 2010,(4):19-22. DOI: 10.13756/j.gtxyj.2010.04.003.
With regard to fiber grating temperature sensor systems that are based on the tunable Fabry-Peort(F-P) filter method
effects of the transmission delay caused by cable length on the wavelength demodulation accuracy is theoretically studied.Numerical simulation results show that when the scan frequency of the demodulation system is 4 Hz
the error of the wavelength measurement for a certain length of optical cable caused by transmission delay is 7.911 pm/km
the corresponding temperature error is about 0.8 ℃/km
which is multiplied with the increase of the scan frequency.
关键词
传输时延精度光纤光栅解调系统
Keywords
transmission delayaccuracyfiber gratingdemodulation system