Fig. 1. Simulation results for the combustion of hydrogen-oxygen mixture. (a) Simulation model; (b) temperature distribution of flame; (c) temperature distribution at Y=4 mm; (d) temperature distribution at X=0 mm

Fig. 2. Simulation results of intra-stress distribution of optical fiber. (a) Simulation model; (b) temperature distribution used during simulation process; (c) cooling curve of the fiber; (d) intra-stress distribution when the cooling time is 5 s; (e) intra-stress distribution varying with the cooling time; (f) tendency of intra-stress at X=0 mm with cooling time and tendency of intra-stress difference between X=2 mm and X=0 mm

Fig. 3. Experimental setup. (a) Heating setup; (b) bending setup

Fig. 4. Results of the bending test when the cooling time is 10 s. (a) Distribution of the bending diameter when the fiber is fractured; (b) distribution of the distance between the fiber fracture point and the flame center

Fig. 5. Results of the bending test when the cooling time is 600, 1200, 1500 s. (a) Distribution of the bending diameter when the fiber is fractured with the cooling time of 600 s; (b) distribution of the distance between the fiber fracture point and the flame center with the cooling time of 600 s; (c) distribution of the bending diameter when the fiber is fractured with the cooling time of 1200 s; (d) distribution of the bending diameter when the fiber is fractured with the cooling time of 1500 s