Fig. 1. Structure diagram of a TFBG

Fig. 2. Calculation transmission and reflection spectrum of TFBG with tilt angle 4°

Fig. 3. Comparison of transmission spectrum with tilt angles 4°, 6° and 8°

Fig. 4. Experimental setup for the filtering of SBS in TFBG

Fig. 5. Measured spectrum of TFBG in SMF-28e. (a) General vision; (b) enlarged vision

Fig. 6. Output power for two systems without and with TFBG. (a) Without TFBG; (b) with TFBG

Fig. 7. Filtering ratio of backward Stokes power after adding TFBG

Fig. 8. Insertion loss generated in TFBG