Fig. 1. Experimental setup of chaos OTDR based on FR

Fig. 2. Properties of chaotic light before and after passing FR. (a) Radio-frequency spectra; (b) time series

Fig. 3. Dynamic ranges of chaos OTDR under 200-MHz bandwidth. (a) Without FR; (b) with FR

Fig. 4. Detection results of fiber faults. (a) Detection result of 23.5-km fiber fault without FR; (b) detection result of 23.5-km fiber fault with FR; (c) detection result of 49.4-km fiber fault without FR; (d) detection result of 49.4-km fiber fault with FR

Fig. 5. Properties of simulated chaotic signal before and after passing FR. (a) Radio-frequency spectra; (b) time series