Jing Chai, Mingjiang Zhang, Yi Liu, Lan Li, Weipeng Xu, Yuncai Wang. Distributed fiber temperature sensor using a laser diode modulated by a pseudo-random bit sequence[J]. Chinese Optics Letters, 2015, 13(8): 080604
- Chinese Optics Letters
- Vol. 13, Issue 8, 080604 (2015)
Fig. 1. Experimental setup of BOCDR using a PRBS-modulated LD.
Fig. 2. Electrical PRBS: (a) time series; (b) power spectrum.
Fig. 3. Structure of the FUT in our experimental work.
Fig. 4. (a) Measured Brillouin spectra at different temperatures; (b) temperature-dependence of the BFS.
Fig. 5. Distribution of the Brillouin spectrum along the FUT with a 1-m-long heated section.
Fig. 6. Fitted BFS as a function of position along the FUT with a 1-m-long section heated to 50°C. Inset, 54 cm resolution can be achieved by this method.
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