Journal de Physique III

Investigations on Excited-State Absorption in Pr3+ Doped Fluorozirconate Fibers

A. Saı̈ssy, Eric Maurice, Gérard Monnom, Daniel B. Ostrowsky

Published Feb 1, 1996• 0 citations

Abstract

Excited state absorption (E.S.A.) in Pr3+ doped fluorozirconate fibers pumped at 1012 nm is investigated by the pump-probe beam method. Probe wavelengths are successively 830, 780 and 1310 nm, we measure both the attenuation of the probe beam when 1012 nm pumping is applied and the modulation of the visible or 1.3 μm fluorescence when the probe is lauched into the fiber. Modelisation of these measurements allows us deducing the magnitude of E.S.A. cross-sections at 830, 780 and 1012 nm.

DOI: 10.1051/jp3:1996125

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Journal de Physique III

Investigations on Excited-State Absorption in Pr3+ Doped Fluorozirconate Fibers

A. Saı̈ssy, Eric Maurice, Gérard Monnom, Daniel B. Ostrowsky

Published Feb 1, 1996• 0 citations

Publisher

Abstract

DOI: 10.1051/jp3:1996125

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Y. M. Cheung, Swapan Kumar Gayen

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Physical review. B, Condensed matterJun 1, 199450 citations

The optical-absorption transitions originating from the lowest 4f5d excited state of

{\mathrm{Pr}}^{3+}

{\mathrm{Y}}_{3}

{\mathrm{Al}}_{5}

{\mathrm{O}}_{12}

have been studied. The experimental arrangement uses a 7-ns 266-nm light pulse to populate the lowest 4f5d state, and a spatially overlapped, time-sequenced pulse from a frequency-tunable dye laser to induce transitions from that excited state. The excited-state-absorption (ESA) spectrum covering the 900--300-nm probe wavelength range is characterized by two broad peaks centered at 700 and 350 nm on a slowly rising background. The peak ESA cross section at 355 nm is (1\ifmmode\pm\else\textpm\fi{}0.1)\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}17}$

{\mathrm{cm}}^{2}

. The position, shape, and strength of the spectrum suggest that the terminal states of the ESA transitions are the second 4f5d state of

{\mathrm{Pr}}^{3+}

and the conduction band of the host lattice. The ESA measurements have been extended to transitions from the

^{3}

{\mathit{P}}_{0}

and

^{1}

{\mathit{D}}_{2}

excited states of the 4

{\mathit{f}}^{2}

configuration of

{\mathrm{Pr}}^{3+}

as well. The ESA cross sections at a probe wavelength of 532 nm are (8\ifmmode\pm\else\textpm\fi{}1)\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}19}$

{\mathrm{cm}}^{2}

and (5.7\ifmmode\pm\else\textpm\fi{}0.6)\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}19}$

{\mathrm{cm}}^{2}

for transitions from the

^{3}

{\mathit{P}}_{0}

and

^{1}

{\mathit{D}}_{2}

excited states, respectively. The terminal state of ESA transitions from these two levels is the lowest 4f5d state. The strong ESA completely inhibits the potential laser action based on emission from these states in this crystal.