@article { , title = {Modeling of resonantly pumped mid-infrared Pr3+-doped chalcogenide fiber amplifier with different pumping schemes}, abstract = {We propose a model for resonantly pumped Pr3+-doped chalcogenide fiber amplifiers which includes excited state absorption and the full spectral amplified spontaneous emission spanning from 2 μm to 6 μm. Based on this model, the observed near- and mid-infrared photoluminescence generated from Pr3+-doped chalcogenide fiber is explained. Then the output properties of a 4.1 μm resonantly pumped Pr3+-doped chalcogenide fiber amplifier are simulated in both co- and counter-pumping schemes. Results show that the 4.1 μm counter-pumped fiber amplifier can achieve a power conversion efficiency (PCE) of over 62.8 \% for signal wavelengths ranging from 4.5 μm to 5.3 μm. This is, to our best knowledge, the highest simulated PCE for a Pr3+-doped chalcogenide fiber amplifier.}, doi = {10.1364/OE.26.023641}, eissn = {1094-4087}, issue = {18}, journal = {Optics Express}, note = { No embargo. KJB 14.06.2018}, pages = {23641-23660}, publicationstatus = {Published}, publisher = {Optical Society of America}, url = {https://nottingham-repository.worktribe.com/output/935994}, volume = {26}, year = {2018}, author = {Shen, M. and Furniss, David and Tang, Z. and Barney, Emma R. and Sójka, L. and Sujecki, S. and Benson, Trevor M. and Seddon, Angela B.} }