1. Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. Higher-order Raman gain generation with pump power of 0.9 W (——), 2 W (....) and 3.5 W (––), separately. Figure Legend: From: Optimization on bandwidth in the third-order pumped distributed fiber Raman amplifier Opt. Eng. 2013;52(7):076112-076112. doi:10.1117/1.OE.52.7.076112

2. Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. The third-order DFRA optical setup. Figure Legend: From: Optimization on bandwidth in the third-order pumped distributed fiber Raman amplifier Opt. Eng. 2013;52(7):076112-076112. doi:10.1117/1.OE.52.7.076112

3. Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. (a) Extended gain profile and noise figure (NF) referring to the parameter in Ref. 6. (b) Pump and signal powers evolution along the fiber span of third-order DFRA. Figure Legend: From: Optimization on bandwidth in the third-order pumped distributed fiber Raman amplifier Opt. Eng. 2013;52(7):076112-076112. doi:10.1117/1.OE.52.7.076112

4. Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. Flow diagram of the MGA applied to the HOP-DFRA optimization. Figure Legend: From: Optimization on bandwidth in the third-order pumped distributed fiber Raman amplifier Opt. Eng. 2013;52(7):076112-076112. doi:10.1117/1.OE.52.7.076112

5. Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. Comparison of gain profiles when the numbers of (a) the second-order pumps and (b) the first-order pumps are increased. Parameters refer to (a) configuration 3 and (b) configuration 4 in Table 1. Figure Legend: From: Optimization on bandwidth in the third-order pumped distributed fiber Raman amplifier Opt. Eng. 2013;52(7):076112-076112. doi:10.1117/1.OE.52.7.076112

6. Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. Gain and goal profiles of third-order DFRA with 5 and 8 pumps. Parameters refer to Table 1: (a) configuration 5 and (b) configuration 8. Figure Legend: From: Optimization on bandwidth in the third-order pumped distributed fiber Raman amplifier Opt. Eng. 2013;52(7):076112-076112. doi:10.1117/1.OE.52.7.076112

7. Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. Gain profiles and NFs of the optimized: (a) third-order DFRA and (b) second-order DFRA with the bandwidth of 50 nm. Figure Legend: From: Optimization on bandwidth in the third-order pumped distributed fiber Raman amplifier Opt. Eng. 2013;52(7):076112-076112. doi:10.1117/1.OE.52.7.076112

8. Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. Gain profile and NF of third-order DFRA with the bandwidth of 80 nm, the parameters of configuration 10 are listed in Table 1. Figure Legend: From: Optimization on bandwidth in the third-order pumped distributed fiber Raman amplifier Opt. Eng. 2013;52(7):076112-076112. doi:10.1117/1.OE.52.7.076112