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Table 1: Spectroscopic parameters of Er3+-doped and Tm3+ doped telluride fiber for numerical calculation.

Parameter Symbol Value Unit Remarks Core diameter 5.0 m Background loss 0.1 dB/m Spontaneous emission rate (Er3+) 172.4 1/s [37] 1804.3 1/s 1000 1/s 51000 1/s 51000 1/s 51000 1/s Spontaneous emission rate (Tm3+) 311 1/s [37] 131 1/s Energy transfer rate 140 1/s [38] 985 1/s Transition rate of ASE 400 1/s [37] 1804.3 1/s Pump absorption cross section 1.0 × 10-25 m2 [38] 1.0 × 10-26 m2 1.0 × 10-25 m2 Stimulated emission cross section (Er3+) 8.6 × 10-25 m2 [38] 8.5 × 10-25 m2 Pump emission cross section (Er3+) 1.0 × 10-26 m2 [38] Stimulated emission cross section (Tm3+) 4.5 × 10-25 m2 [38] 4.5 × 10-25 m2 8.6 × 10-25 m2 8.6 × 10-25 m2