Fig. 1. Experimental setup diagram and results. (a) Static output P-I-V curves of 25 ℃ laser; (b) static optical spectrum; (c) schematic of experimental setup of chaotic laser

Fig. 2. Change of output state with bias current when the transmission to reflection ratio is 65/35. (a)-(e) Currents are 1.8 A, 2.2 A, 2.6 A, 3.2 A, and 4.0 A, respectively

Fig. 3. PI curves under different feedback intensities

Fig. 4. Output state of the laser at transmission to reflection ratio is 40/60 and bias current is 3.5 A. (a) Power spectrum; (b) time series; (c) autocorrelation curves

Fig. 5. Device diagram of ranging

Fig. 6. Experimental results of chaotic ranging