doi:10.1088/1555-6611/aa9ebcengValles, J.A.Martin, J.C.Berdejo, V.Cases, R.Alvarez, J.M.Rebolledo, M.A.Assessment of effect of Yb3+ ion pairs on a highly Yb-doped double-clad fibre laserART-2018-104952Using a previously validated characterization method based on the careful measurement of the characteristic parameters and fluorescence emission spectra of a highly Yb-doped double-clad fibre, we evaluate the contribution of ion pair induced processes to the output power of a double-clad Yb-doped fibre ring laser. This contribution is proved to be insignificant, contrary to analysis by other authors, who overestimate the role of ion pairs.2018http://zaguan.unizar.es/record/7712610.1088/1555-6611/aa9ebchttp://zaguan.unizar.es/record/77126oai:zaguan.unizar.es:77126info:eu-repo/grantAgreement/ES/DGA/FSEinfo:eu-repo/grantAgreement/ES/MINECO/TEC2013-46643-C2-2-RLASER PHYSICS 28, 3 (2018), 035003 [5 pp]All rights reservedhttp://www.europeana.eu/rights/rr-f/info:eu-repo/semantics/openAccess