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Excited-state absorption in erbium-doped silica fiber with simultaneous excitation at 977 and 1531 nm

J. Appl. Phys. 106, 083108 (2009); doi:10.1063/1.3248369

Published 26 October 2009

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Yu. O. Barmenkov,1 A. V. Kir'yanov,1 A. D. Guzmán-Chávez,1 José-Luis Cruz,2 and Miguel V. Andrés2
1Centro de Investigaciones en Óptica, Loma del Bosque 115, Col. Lomas del Campestre, 37150 León, Guanajuato, Mexico
2Departamento de Física Aplicada, ICMUV, Universidad de Valencia, Dr. Moliner 50, E46100 Burjassot (Valencia), Spain
We report a study of the excited-state absorption (ESA) in erbium-doped silica fiber (EDF) pumped at 977 nm, when the fiber is simultaneously excited by signal radiation at 1531 nm. We show, both experimentally and theoretically, that ESA efficiency at 977 nm gets strongly enhanced only in the presence of signal power. Experimentally, this conclusion is supported through the detection of upconversion emission, a “fingerprint” of the ESA process, and through the measurements of the EDF nonlinear transmission coefficient for the pump wavelength, which is sensitive to the ESA value. It is shown that the experimental data are precisely modeled with an advanced five-level Er3+ model developed for the EDF. ©2009 American Institute of Physics
History: Received 6 June 2009; accepted 22 September 2009; published 26 October 2009
Permalink: http://link.aip.org/link/?JAPIAU/106/083108/1
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0021-8979 (print)   1089-7550 (online)
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