Relevant bibliographies by topics / Ytterbium borure

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Academic literature on the topic 'Ytterbium borure'

Author: Grafiati
Published: 8 November 2023

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Journal articles on the topic "Ytterbium borure"

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Huppertz, Hubert. "Multianvil High-Pressure Synthesis And Crystal Structure Of β-YbBO3." Zeitschrift für Naturforschung B 56, no. 8 (August 1, 2001): 697–703. http://dx.doi.org/10.1515/znb-2001-0801.

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β-Ytterbium borate (β-YbBO3) was synthesized under high-pressure in a Walker-type multianvil apparatus at 2.2 GPa and 1400 °C. The title-compound crystallizes in the trigonal calcite structure, space group R3̄̄c. Single crystal X-ray data yielded a = 492.1(2), c = 1630.5(9) pm, wR2 = 0.0344 for 165 F2 values and 11 variable parameters. Within the trigonal planar BO3 groups the B-O distance is 137.8(4) pm. The ytterbium atoms have a slightly distorted octahedral oxygen coordination (Yb-O: 224.4(2) pm)
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Galutskiy, Valeriy V., Elena V. Stroganova, and Nikolay A. Yakovenko. "A Comparative Analysis of Ytterbium-Erbium Media for 1.5 μm Lasers." Advanced Materials Research 660 (February 2013): 40–46. http://dx.doi.org/10.4028/www.scientific.net/amr.660.40.

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To increase efficiency of continuous 1.5 μm laser radiation crystal laser media should be used instead of the glass ones. Generation efficiency in major laser crystals with ytterbium and erbium is at a disadvantage in relation to phosphate glasses. A cause of this phenomenon is a reverse energy transfer. Could be found crystals comparable in efficiency with Yb-Er phosphate glasses? At present a number of investigations on the use of ions relaxators Се 3+ in crystals Ca2Al2Si07 with ytterbium and erbium have been carried out to solve the problem of the reverse energy transfer in crystals [1,2]. It has been determined [1-3] that high content of cerium is needed to depress the reverse energy transfer. But cerium and ytterbium are in different ends of a lanthanide series, so silicate crystals with more isomorphic capacity such as Yb,Er,Ce:CaGdSiO (CGCS) have been proposed [3]. A sufficient solubility of Се 3+ ions in these crystals gives fast excitation relaxation on a laser level and guards against the reverse energy transfer from Er3+ to donor ions. Furthermore, a number of crystal media on the base of borate crystals with a developed phonon spectrum have been proposed [4,5]. They lack the reverse energy transfer, fast multiphonon nonradiative relaxation shunts the 4I11/2 – 4I13/2 Er3+ transfer. New crystals on the base of anhydrous borates – calcium-yttrium oxyorthoborates - Ca4YO(BO3)3 (YCOB) with ytterbium appeared recently [6], which showed high efficiency of generation, as well as calcium-barium fluor-orthoborates YbEr:Ca BaFBO3 (CBFB), in which ytterbium ions formed centers of luminescence with excellent characteristics [6]. Unfortunately, erbium ions in YCOB are characterized by high three level parameter [6], therefore the efficiency of generation Er,Yb:YCOB is not high. It has been determined recently that erbium ions in crystals CBFB have outstanding spectroscopic parameters, besides, between ytterbium and erbium ions fast energy transfer of electronic excitation takes place [7]. Since the efficiency of a sensitized laser medium depends on joint characteristics of the Yb and Er centres and the efficiency of their interactions, then available data allow considering crystals CBFB as a considerably promising matrix for an effective 1.5 μm laser. In order to obtain the most promising laser crystals and to answer the question cited above, it should be made their comparative analysis on basic spectroscopic and generative parameters. One of the important parameters related directly to the efficiency of the laser medium is an energy density of the generation threshold. Given spectroscopic parameters of active centers in crystals, the generation threshold of the one-activated laser medium (in an idealized model without passive losses) with a tree-level or quasi-four-level scheme of generation is specified by properties of active centers and can be easily determined by a simple formula [8]. The results obtained by this method are often used for determination of limiting parameters of the three-level laser media, the ytterbium media, for instance, and their comparative analysis [8]. There are known calculations of sensitized media generation parameters, among them the ytterbium-erbium glasses with a tube pumping [9], which although can be used for a diode pumping, nonetheless they are too unwieldy for simple estimation and comparative analysis. Hence there is a demand for simple analytical expressions such as [8] to calculate the lower limit of generation of the sensitized two-activated laser media with a diode pumping. The work reports the growing of single crystals CBFB and YCOB doped with erbium and ytterbium with erbium, and single crystals Yb,Er,Ce:CGS as well. We have made a comparative analysis of an ytterbium-erbium media for 1.5 μm lasers with a diode pumping on the base of simple expressions for limiting generation thresholds of the idealized sensitized media with a three-level scheme of generation, obtained in the approximation of balance equations without considering nonlinear and cumulative processes.
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Ivanov, V. Yu, A. M. Kuzmenko, and A. A. Mukhin. "Magnetoelectric effect in ytterbium aluminum borate YbAl3(BO3)4." JETP Letters 105, no. 7 (April 2017): 435–41. http://dx.doi.org/10.1134/s0021364017070074.

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Rabe, Gerd W., Florian A. Riederer, Mei Zhang-Preße, and Glenn P. A. Yap. "Heteroleptic lanthanide terphenyl/tris(pyrazolyl)borate compounds of ytterbium." Inorganica Chimica Acta 364, no. 1 (December 2010): 255–58. http://dx.doi.org/10.1016/j.ica.2010.08.011.

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Wang, Pu, Judith M. Dawes, Peter Dekker, and James A. Piper. "Highly efficient diode-pumped ytterbium-doped yttrium aluminum borate laser." Optics Communications 174, no. 5-6 (February 2000): 467–70. http://dx.doi.org/10.1016/s0030-4018(99)00686-0.

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Lu, Dazhi, Xiaoheng Li, Haohai Yu, Huaijin Zhang, and Jiyang Wang. "Review of the Yb3+:ScBO3 Laser Crystal Growth, Characterization, and Laser Applications." Applied Sciences 11, no. 22 (November 17, 2021): 10879. http://dx.doi.org/10.3390/app112210879.

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Passive Q-switching is an effective approach for generating pulsed lasers, owing to its compact and additional modulation-free design. However, to compare favorably with active Q-switching and multi-stage amplification, the output energy needs to be enhanced for practical applications. Kramers Ytterbium ion (Yb3+)-doped borate crystals, with their excellent energy storage capacity, have been proven to be high-potential laser gain mediums for achieving pulsed lasers with moderate and high output energy using passive Q-switching technology. In this study, the growth, characterization, and laser generation of one Yb3+-doped borate crystal, the Yb3+:ScBO3 crystal, are systematically reviewed. The continuous-wave and passive Q-switching laser characteristics are presented in detail, and the self-pulsations derived from intrinsic ground-state reabsorption are also demonstrated. The specific characteristics and experiments confirm the potential of the Yb3+:ScBO3 crystal for future pulsed laser applications with moderate or even high energy output.
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Sablayrolles, J., V. Jubera, F. Guillen, R. Decourt, M. Couzi, J. P. Chaminade, and A. Garcia. "Infrared and visible spectroscopic studies of the ytterbium doped borate Li6Y(BO3)3." Optics Communications 280, no. 1 (December 2007): 103–9. http://dx.doi.org/10.1016/j.optcom.2007.07.034.

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Guo, Rui, Yicheng Wu, Peizhen Fu, and Fangli Jing. "Growth and spectroscopic properties of ytterbium-doped lanthanum calcium borate (Yb3+:La2CaB10O19) crystal." Optics Communications 244, no. 1-6 (January 2005): 321–25. http://dx.doi.org/10.1016/j.optcom.2004.09.041.

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Litlabø, Rannveig, Kuburat Saliu, Michael J. Ferguson, Robert McDonald, Josef Takats, and Reiner Anwander. "Monomeric Tetraalkylaluminates of Divalent Ytterbium Stabilized by a Bulky Tris(pyrazolyl)borate Ligand." Organometallics 28, no. 23 (December 14, 2009): 6750–54. http://dx.doi.org/10.1021/om900744k.

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Sablayrolles, J., V. Jubera, M. Delaigue, I. Manek-Hönninger, J. P. Chaminade, J. Hejtmanek, R. Decourt, and A. Garcia. "Thermal properties and cw-laser operation of the ytterbium doped borate Li6Y(BO3)3." Materials Chemistry and Physics 115, no. 2-3 (June 2009): 512–15. http://dx.doi.org/10.1016/j.matchemphys.2009.02.011.

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Dissertations / Theses on the topic "Ytterbium borure"

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Bouvet, Alain. "Étude par diffusion inélastique de neutrons des propriétés magnétiques de borures de terre rare : CeB6, PrB6 et YbB12." Université Joseph Fourier (Grenoble ; 1971-2015), 1993. http://www.theses.fr/1993GRE10186.

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Cette thèse porte sur l'étude par diffusion inélastique de neutrons des propriétés magnétiques de borures de terre rare : ceb#6, prb#6 et ybb#1#2. La difficulté de réalisation des expériences, notamment la faiblesse des signaux due en partie à la forte absorption des neutrons par le bore, nous a conduit à inclure, dans un programme d'analyse, la correction d'absorption. La partie principale de cette thèse a été l'étude des interactions magnétiques dans les phases ordonnées de ceb#6 et prb#6. Nous avons confirmé la présence d'interactions magnétiques quadrupolaires importantes, grâce à la mesure des excitations magnétiques dans la phase quadrupolaire de ceb#6 en appliquant un champ magnétique dont la valeur était comprise entre 0 et 6 t, et dans les phases double-k et simple-k basse température de prb#6. De plus nous avons montré qu'il semble exister une compétition entre les interactions magnétiques quadrupolaires et les interactions magnétiques dipolaires dans le compose ceb#6, alors que les interactions quadrupolaires dans prb#6 semblent au contraire renforcer la structure magnétique dipolaire. Les mesures effectuées avec le compose ybb#1#2 nous ont permis de donner une valeur de 60 k pour l'énergie du gap, cette valeur étant conforme à celles obtenues par des mesures de résistivité et d'optique. De plus nous proposons un schéma de niveau de champ cristallin, avec le niveau fondamental #8 et les niveaux excites #7 et #6 a respectivement 18 et 39 mev. En annexe, nous présentons également les résultats obtenus par diffusion inélastique de neutrons avec le compose bidimensionnel xy bani#2(po#4)#2. Un programme a été développé pour déconvoluer les spectres mesures de la fonction de résolution instrumentale à 4 dimensions. Les largeurs intrinsèques, ainsi déterminées, de la diffusion magnétique critique ne montrent aucune caractéristique des excitations non linéaires prévues par la théorie, mais peut être expliqué uniquement par une renormalisation des ondes de spin
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Kränkel, Christian. "Ytterbium-dotierte Borate und Vanadate mit grosser Verstärkungsbandbreite als aktive Materialien im Scheibenlaser." Aachen Shaker, 2008. http://d-nb.info/993614949/04.

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Kränkel, Christian [Verfasser]. "Ytterbium-dotierte Borate und Vanadate mit großer Verstärkungsbandbreite als aktive Materialien im Scheibenlaser / Christian Kränkel." Aachen : Shaker, 2009. http://d-nb.info/1126378771/34.

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Sablayrolles, Jean. "De l'ultraviolet à l'infrarouge : caractérisation spectroscopique de matériaux type borate et oxyborate dopés à l'ytterbium trivalent." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2006. http://tel.archives-ouvertes.fr/tel-00289293.

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L'ion ytterbium trivalent présente la particularité de pouvoir donner lieu à deux émissions aux propriétés spectroscopiques différentes : l'une, de durée de vie courte, dans l'ultraviolet (émission de transfert de charge) employée au sein de détecteurs tels que les scintillateurs, et l'autre, de durée de vie longue, dans l'infrarouge (émission de type 4f x 4f) pour des applications de type laser.La relation étroite qui existe entre structure et propriétés de la matière est illustrée au travers de l'étude de la luminescence de l'ytterbium, dans l'ultraviolet et l'infrarouge, inséré dans le borate Li6Y(BO3)3 ainsi que deux oxyborates : LiY6O5(BO3)3 et Y17,33B8O38. Pour la première fois dans des oxyborates une émission de transfert de charge de l'ytterbium a été observée. Une approche théorique a permis le calcul des courbes à une seule coordonnée de configuration des niveaux d'énergie de la liaison ytterbium - oxygène, ainsi que la simulation de l'extinction thermique de cette émission. L'étude de la spectroscopie infrarouge de l'ytterbium dans ces composés a été réalisée et une attribution des niveaux d'énergie est proposée dans le cas du borate Li6Y(BO3)3 : Yb3+. Une approche originale est également introduite avec l'étude des états de transfert de charge pour les trois composés via l'émission dans l¤infrarouge. Les premiers tests portant sur les performances lasers dans trois régimes de fonctionnement (continu, déclenché et blocage de modes) d¤un cristal de Li6Y(BO3)3 : Yb3+ (Yb-LYB) sont reportés.
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Book chapters on the topic "Ytterbium borure"

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Leonyuk, N. I., V. V. Maltsev, E. A. Volkova, E. V. Koporulina, N. V. Kuleshov, V. E. Kisel, and K. N. Gorbachenya. "Ytterbium and Erbium Co-doped Rare-Earth Aluminum Borate Crystals as New Materials for Eye-Safe Lasers: Flux Growth and Characterization." In Handbook of Ecomaterials, 1–46. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-48281-1_118-1.

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Leonyuk, N. I., V. V. Maltsev, E. A. Volkova, E. V. Koporulina, N. V. Kuleshov, V. E. Kisel, and K. N. Gorbachenya. "Ytterbium and Erbium Co-doped Rare-Earth Aluminum Borate Crystals as New Materials for Eye-Safe Lasers: Flux Growth and Characterization." In Handbook of Ecomaterials, 2491–536. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-68255-6_118.

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