Effective segregation coefficient of Er3+ions in ErF3-doped CaF2crystals

Munteanu, Mihai; Stef, Marius; Bunoiu, Mădălin; Nicoarǎ, Irina

doi:10.1088/0031-8949/81/03/035602

Cited by 3 publications

(3 citation statements)

References 21 publications

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“…The effective distribution coefficient, k ef , has been determined using the optical absorption method [6][7][8]. In order to investigate the dopant concentration along the crystals and to determine the segregation coefficient, the crystals were cut from the bottom to the top into i = 9 slices.…”

Section: Methodsmentioning

confidence: 99%

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Segregation coefficient of Yb3+ and Yb2+ ions in YbF3 doped BaF2 crystals

Nicoarǎ¹,

Buşe²,

Bunoiu³

2014

AIP Conference Proceedings

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Abstract. BaF 2 :0.17 mol%YbF 3 crystal was grown using the conventional Bridgman technique. The optical absorption spectra reveal the existence of both Yb 2+ and Yb 3+ ions with the characteristic bands of the trivalent ions in the near-IR region and of the divalent ions in the UV spectral domain. The concentration distribution of the Yb 2+ and Yb 3+ ions among the sample was investigated using the optical absorption method. The segregation coefficient of the two types of Yb ions has been determined. From our calculations the segregation coefficient of the Yb 3+ ions in BaF 2 host is ≈ 0.7, and of the Yb 2+ ions is ≈ 0.6.

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Section: Methodsmentioning

confidence: 99%

“…The value of C S can be measured by various methods, or estimated from optical absorption measurements [6][7][8] as described below.…”

Section: Methodsmentioning

confidence: 99%

Segregation coefficient of Yb3+ and Yb2+ ions in YbF3 doped BaF2 crystals

Nicoarǎ¹,

Buşe²,

Bunoiu³

2014

AIP Conference Proceedings

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“…The growth procedure is as described in [11]. The segregation coefficient of the Er 3+ and Yb 3+ ions is ∼1 [12,13], so the dopant distribution along the crystals is approximately uniform. The studied samples were cut from the middle of the crystals.…”

Section: Methodsmentioning

confidence: 99%

Influence of Yb³⁺ions on the optical properties of double-doped Er,Yb : CaF₂crystals

et al. 2011

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Judd-Ofelt (J-O) analysis is used to estimate the magnitude of the forced (4f-4f) transition probabilities of Er 3+ ions in double-doped (Er,Yb) : CaF 2 crystals. The studied crystals were grown in our crystal research laboratory using the vertical Bridgman method. The J-O intensity parameters 2 , 4 and 6 were calculated from the optical absorption spectra. These parameters were then used to evaluate the spontaneous transition probability, the line strength, the branching ratio and the radiative lifetime. The obtained radiative decay rates were compared with the luminescence spectra.

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