Magneto-optical properties of heavily rare-earth doped non-crystalline fluorophosphates

Letellier, V.; Seignac, A.; Floch, A. Le; Matecki, M.

doi:10.1016/0022-3093(89)90423-7

Cited by 36 publications

(25 citation statements)

References 13 publications

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“…As expected, these values are close to the 4f 8 ↔ 4f 7 5d transition of the Tb 3+ ion (~250 nm)5, and are also similar to other reported values, e.g. , Tb 3+ -doped phosphate (~250 nm)27, borosilicate (~259–280 nm)28, aluminoborate (~250 nm)24, sodium borate (~220 nm)8 and fluorophosphate glasses (~217 nm)26.…”

Section: Resultssupporting

confidence: 90%

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Faraday rotation and photoluminescence in heavily Tb3+-doped GeO2-B2O3-Al2O3-Ga2O3 glasses for fiber-integrated magneto-optics

Gao

Winterstein-Beckmann

Surzhenko

et al. 2015

Sci Rep

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We report on the magneto-optical (MO) properties of heavily Tb3+-doped GeO2-B2O3-Al2O3-Ga2O3 glasses towards fiber-integrated paramagnetic MO devices. For a Tb3+ ion concentration of up to 9.7 × 1021 cm−3, the reported glass exhibits an absolute negative Faraday rotation of ~120 rad/T/m at 632.8 nm. The optimum spectral ratio between Verdet constant and light transmittance over the spectral window of 400–1500 nm is found for a Tb3+ concentration of ~6.5 × 1021 cm−3. For this glass, the crystallization stability, expressed as the difference between glass transition temperature and onset temperature of melt crystallization exceeds 100 K, which is a prerequisite for fiber drawing. In addition, a high activation energy of crystallization is achieved at this composition. Optical absorption occurs in the NUV and blue spectral region, accompanied by Tb3+ photoluminescence. In the heavily doped materials, a UV/blue-to-green photo-conversion gain of ~43% is achieved. The lifetime of photoluminescence is ~2.2 ms at a stimulated emission cross-section σem of ~1.1 × 10−21 cm2 for ~ 5.0 × 1021 cm−3 Tb3+. This results in an optical gain parameter σem*τ of ~2.5 × 10−24 cm2s, what could be of interest for implementation of a Tb3+ fiber laser.

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Section: Resultssupporting

confidence: 90%

“…λ t is a weighted average value which is taken as the origin of the paramagnetic Faraday rotation. In rare earth ions, it is close to the position of the electric transition of 4f n ↔ 4f n−1 5d26. Plotting V −1 over λ 2 therefore yields a linear relationship (Fig.…”

Section: Resultsmentioning

confidence: 72%

Faraday rotation and photoluminescence in heavily Tb3+-doped GeO2-B2O3-Al2O3-Ga2O3 glasses for fiber-integrated magneto-optics

Gao

Winterstein-Beckmann

Surzhenko

et al. 2015

Sci Rep

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“…The correlations between the Verdet constant and ion concentrations obtained for Tb 3+ -doped borogermanate matrix, Nd 3+ -and Pr 3+ -doped silicate, phosphate and borate glasses [25], data connected with fluorine phosphate glasses [26,27] and industrial magneto-optical glasses [24,28,29] are shown in Fig. 4.…”

Section: Discussionmentioning

confidence: 99%

Borogermanate glasses with a high terbium oxide content

Savinkov

Сигаев

Golubev

et al. 2010

Journal of Non-Crystalline Solids

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“…Also, the Verdet constants at 500 nm for the SiO 2 films, which are about Ϫ0.02 to Ϫ0.005 deg/cm Oe ͑from Ϫ1.2 to Ϫ0.3 min/cm Oe͒, are comparable to those reported for rare-earth-containing glasses. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] A comparison of x-ray diffraction patterns and Mössbauer spectra between Al 2 O 3 and TiO 2 thin films reveals that the amount of EuS precipitated is larger in the TiO 2 thin films than in the Al 2 O 3 thin films when the preparation condition is the same as each other. This is presumably attributable to the difference in ability to form amorphous state between TiO 2 and Al 2 O 3 .…”

Section: Discussionmentioning

confidence: 99%

“…One candidate for that purpose is inorganic glass containing a large amount of rare-earth ions. As indicated by many researchers, [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] rare-earth-containing oxide and fluoride glasses exhibit Faraday rotation in the visible region. The magnitude of Faraday rotation angle increases monotonically with a decrease in the wavelength, and this relationship is described well in terms of the single oscillation model derived from a theory of Van Vleck and Hebb 16 for a paramagnetic solid.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Faraday effect of EuS microcrystal-embedded oxide thin films

Tanaka

Tatehata

Fujita

et al. 2001

Journal of Applied Physics

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EuS microcrystal-embedded SiO 2 , Al 2 O 3 , and TiO 2 thin films have been prepared by using rf sputtering method. X-ray diffraction analysis indicates that EuS microcrystal is precipitated as a single phase in Al 2 O 3 and TiO 2 films while precipitation of EuS is not detected in SiO 2 film. Faraday effect attributable to the 4 f 7-4 f 6 5d transition of Eu 2ϩ in EuS microcrystalline phase is observed in Al 2 O 3 and TiO 2 films. In particular, Faraday rotation angle observed for EuS-embedded TiO 2 film is large; for instance, the magnitude of Verdet constant for as-deposited TiO 2 film prepared without heating of substrate during the sputtering is 0.15 deg/cm Oe at wavelength of 700 nm. This value is larger by two orders of magnitude than those of Eu 2ϩ-or Tb 3ϩ-containing oxide glasses which show the largest Faraday rotation angle among rare-earth-containing glasses, and is comparable to the value for EuSe single crystal.

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Magneto-optical properties of heavily rare-earth doped non-crystalline fluorophosphates

Cited by 36 publications

References 13 publications

Faraday rotation and photoluminescence in heavily Tb3+-doped GeO2-B2O3-Al2O3-Ga2O3 glasses for fiber-integrated magneto-optics

Faraday rotation and photoluminescence in heavily Tb3+-doped GeO2-B2O3-Al2O3-Ga2O3 glasses for fiber-integrated magneto-optics

Borogermanate glasses with a high terbium oxide content

Preparation and Faraday effect of EuS microcrystal-embedded oxide thin films

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