Highly efficient cascaded amplification using Pr³⁺-doped mid-infrared chalcogenide fiber amplifiers
Files
Links to Files
Author/Creator ORCID
Date
Type of Work
Department
Program
Citation of Original Publication
Hu, Jonathan, Curtis R. Menyuk, Chengli Wei, L. Brandon Shaw, Jasbinder S. Sanghera, and Ishwar D. Aggarwal. “Highly efficient cascaded amplification using Pr³⁺-doped mid-infrared chalcogenide fiber amplifiers.” Optics Letters 40, no. 16 (August 15, 2015): 3687–90. https://doi.org/10.1364/OL.40.003687.
Rights
This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
Public Domain
Public Domain
Abstract
We computationally investigate cascaded amplification in a three-level mid-infrared (IR) Pr³⁺-doped chalcogenide fiber amplifier. The overlap of the cross-sections in the transitions ³H₆ -> ³H₅ and ³H₅ -> ³H₄ enable both transitions to simultaneously amplify a single wavelength in the range between 4.25 μm and 4.55 μm. High gain and low noise are achieved simultaneously if the signal is at 4.5 μm. We show that 45% of pump power that is injected at 2 μm can be shifted to 4.5 μm. The efficiency of using a mid-IR fiber amplifier is higher than what can be achieved by using mid-IR supercontinuum generation, which has been estimated at 25%. This mid-IR fiber amplifier can be used in conjunction with quantum cascade lasers to obtain a tunable, high-power mid-IR source.