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Optics Letters

Optics Letters


  • Vol. 30, Iss. 15 — Aug. 1, 2005
  • pp: 1926–1928

Observation of spatial migration of excitation in Er-doped optical fibers by means of a population grating technique

Serguei Stepanov and Eliseo Hernández  »View Author Affiliations

Optics Letters, Vol. 30, Issue 15, pp. 1926-1928 (2005)

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The influence of spatial migration of excitation among neighboring Er3+ ions on the dynamics of population grating formation in Er-doped optical fibers is reported. The effect manifests itself in an additional increment in the grating formation rate compared with the fluorescence growth rate observed for the same spatially uniform average light power. The experiments, performed at lambda=1549 nm in the configuration of transient two-wave mixing with two similar single-mode Er-doped fibers with significantly different erbium concentrations (approximately 640 and approximately 5600 parts in 10^6), demonstrated the essential contribution of this effect to the grating formation rate in the latter fiber. The evaluated diffusion coefficient proved to be approximately 2.3×10^-9 cm²/s, which ensures effective migration of the excitation by approximately 48 nm, i.e., by approximately 18 average inter-ion distances in this fiber.

© 2005 Optical Society of America

OCIS Codes
(060.2410) Fiber optics and optical communications : Fibers, erbium
(190.7070) Nonlinear optics : Two-wave mixing

Serguei Stepanov and Eliseo Hernández, "Observation of spatial migration of excitation in Er-doped optical fibers by means of a population grating technique," Opt. Lett. 30, 1926-1928 (2005)

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