| 摘要 |
PROBLEM TO BE SOLVED: To provide an interference type optical fiber sensor capable of relatively reducing a noise, while increasing the number of signals used after photoelectric conversion. ! SOLUTION: The interference type optical fiber sensor includes a light source 12, a detection part 13 including a plurality of sets of sensing interferometers configured so that an inputted pulse and a pulse obtained by delaying the inputted pulse, according to a measurement signal are superimposed and outputted, a photoelectric conversion part 170 photoelectrically converting a plurality of pulses from the detection part 13, and a processing part 17 processing an electrical signal supplied from the photoelectric conversion part 170, to demodulate the measurement signal. The detection part 13 includes a delay circuit configured so that the output pulses of the plurality of sets of sensing interferometers are delayed so as to be continuous and outputted to the photoelectric conversion part 170. The photoelectric conver |
