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Nonlinear upconversion-rate in Er-doped fibers
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.ORCID iD: 0000-0003-2136-4914
2001 (English)In: Acta Physica Polonica. A, ISSN 0587-4246, E-ISSN 1898-794X, Vol. 99, no 1, 147-153 p.Article in journal (Refereed) Published
Abstract [en]

Energy transfer between excited rare-earth ions has been widely used for realizing upconversion lasers and also recognized as a gain limiting factor in high-concentration Er-doped amplifiers. The energy transfer leads to upconversion of the excitation which for randomly distributed (not clustered) ions is called homogeneous upconversion. It was commonly assumed that the rate of homogeneous upconversion is a linear function of the population inversion N-2. However, recently published Monte Carlo simulations predict that the homogeneous upconversion rate is a nonlinear function of N-2 and that it, moreover, depends on the pump and signals rates. In this paper we review some of our experimental results confirming those predictions. We also propose a statistical, analytical model describing the observed homogeneous upconversion behavior in Er-doped fibers.

Place, publisher, year, edition, pages
2001. Vol. 99, no 1, 147-153 p.
Keyword [en]
up-conversion, 980 nm, silica
Identifiers
URN: urn:nbn:se:kth:diva-20370ISI: 000166996800016OAI: oai:DiVA.org:kth-20370DiVA: diva2:339065
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Swillo, Marcin

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