Optimizing the pumping configuration for the power scaling of in-band pumped erbium doped fiber amplifiers
Lim, Ee-Leong, Alam, Shaif-ul and Richardson, David J. (2012) Optimizing the pumping configuration for the power scaling of in-band pumped erbium doped fiber amplifiers. Optics Express, 20, (13), 13886-13895. (doi:10.1364/OE.20.013886).
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A highly efficient (~80%), high power (18.45 W) in-band, core pumped erbium/ytterbium co-doped fiber laser is demonstrated. To the best of our knowledge, this is the highest reported efficiency from an in-band pumped 1.5 µm fiber laser operating in the tens of watts regime. Using a fitted simulation model, we show that the significantly sub-quantum limit conversion efficiency of in-band pumped erbium doped fiber amplifiers observed experimentally can be explained by concentration quenching. We then numerically study and experimentally validate the optimum pumping configuration for power scaling of in-band, cladding pumped erbium doped fiber amplifiers. Our simulation results indicate that a ~77% power conversion efficiency with high output power should be possible through cladding pumping of current commercially available pure Erbium doped active fibers providing the loss experienced by the cladding guided 1535 nm pump due to the coating absorption can be reduced to an acceptable level by better coating material choice. The power conversion efficiency has the potential to exceed 90% if concentration quenching of erbium ions can be reduced via improvements in fiber design and fabrication.
|Digital Object Identifier (DOI):||doi:10.1364/OE.20.013886|
|Subjects:||Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
|Divisions:||Faculty of Physical Sciences and Engineering > Optoelectronics Research Centre
|Date Deposited:||06 Jul 2012 13:22|
|Last Modified:||27 Mar 2014 20:23|
Table-Top Lasers for Resonant Infrared Deposition of Polymer Films
Funded by: EPSRC (EP/I02798X/1)
Led by: David Patrick Shepherd
1 January 2012 to 31 December 2014
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