Silicate crystals for infra-red lasers

Avanesov, A. G.; Лебедев, В. А.; Zhorin, V. V.; Охримчук, А. Г.; Шестаков, А. В.

doi:10.1016/s0022-2313(96)00148-2

Cited by 11 publications

(9 citation statements)

References 3 publications

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“…The threshold pump power of laser operation was 1.41 W and the slope efficiency evaluated at incident pump powers is up to 45%. We have known from Table 1 that Yb:SSO possess a much larger thermal conductivity of 7.5 W m −1 K −1 than that of [5,6]. Furthermore, Yb:SSO have a negative refractive index characterization with ( dn/ dT ) th equaling to −6.3 × 10 −6 K −1 which is quite different from that of YSO ( dn/ dT equals to 7.2 × 10 −6 K −1 ) [6].…”

Section: Laser Experimentsmentioning

confidence: 98%

Bulk crystal growth and efficient diode-pumped laser performance of Yb3+:Sc2SiO5

Zheng

Zhao

et al. 2008

Appl. Phys. B

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A bulk crystal of Yb:Sc 2 SiO 5 (Yb:SSO) with favorable thermal properties was successfully obtained by the Czochralski method. The energy level diagrams for Yb:SSO crystal were determined by optical spectroscopic analysis and semi-empirical crystal-field calculations using the simple overlap model. The full width at half maximum of the absorption band centering at 976 nm was calculated to be 24 nm with a peak absorption cross-section of 9. Table 1.As indicated in Table 1, Sc 2 SiO 5 crystal with characterizations of high thermal conductivity and negative refractive index is an excellent laser host [6]. However, the growth of Yb:Sc 2 SiO 5 single crystal with a large size is rather difficult mainly due to crystal diameter controlling [7,8]. Ivanov reported a transparent crystal slice with a diameter of 4 mm grown by the Czochralski method [9]. Furthermore, no laser action was reported on Yb:Sc 2 SiO 5 until now.In this letter, we report on the growth of 5 at. % Yb: Sc 2 SiO 5 with a large size of 25 mm in diameter, by imu Fax: +86-21-69987109, E-mail: xujun@mail.shcnc.ac.cn proving the growth conditions. The laser performances under diode-pumping are also presented. The segregation coefficient of Yb 3+ ion was detected by inductively coupled plasma atomic emission spectrometry (ICP-AES). Crystal structure was identified by X-ray diffractometry (Cu target, K α , X-pert, Hollland). The unpolarized absorption spectrum was measured with a UV/Vis/NIR spectrophotometer (Model V-570, JASCO) using Xe light as the pump source. The fluorescence spectrum was measured with a 940 nm pumping source (Jobin-Yvon TRIAX 550 spectrophotometer). A fluorescence lifetime measurement was carried out by a computer-controlled transient digitizer decay curve of emission. All measurements were performed at room temperature.

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Section: Laser Experimentsmentioning

confidence: 98%

Bulk crystal growth and efficient diode-pumped laser performance of Yb3+:Sc2SiO5

Zheng

Zhao

et al. 2008

Appl. Phys. B

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“…Исследовались кристаллы с концентрацией хрома порядка 1%, выращенные в Кубанском госуниверситете методом Чохральского из иридиевого тигля в атмосфере азота со скоростью 1.5 mm/h. Температура плавления превышала 1970 • C. Оптические свойства этих кристаллов исследовались в работах [12][13], авторы которых считают, что ионы Cr 4+ занимают тетраэдрические позиции кремния, а Cr 3+ -квазиоктаэдрические позиции иттрия или скандия.…”

Section: образцы и методика измеренийunclassified

Парамагнитные центры хрома в кристаллах Y-=SUB=-2-=/SUB=-SiO-=SUB=-5-=/SUB=- и Sc-=SUB=-2-=/SUB=-SiO-=SUB=-5-=/SUB=-

Vazhenin¹,

Потапов²,

Shakurov³

et al. 2018

Физика Твердого Тела

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The EPR spectrum of yttrium and scandium silicate single crystals doped with chromium has been studied at various frequencies. Y_2SiO_5 has one triclinic Cr^3+ center, while the Sc_2SiO_5 crystals demonstrate two nonequivalent centers. The spin Hamiltonian parameters of these centers have been determined. These centers are found to be tricharged chromium ions localized in the yttrium and scandium positions.

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“…This interest stimulated the study of single-crystal materials with a broad band emission in the near-IR region. The study involved several tungstates (Nikolov et al, 2003a,b,c;Nikolov, Nikolov, Kovacheva & Peshev, 2003;Nikolov, 2004;Hermanowicz, 2006;Ivanova et al, 2007;Cavalli et al, 2008;Tzvetkov et al, 2009;Koseva et al, 2011), molybdates Wang et al, 2007Wang et al, , 2008, germanates (Bykov et al, 2005), gallate spinels (Kim et al, 2004), silicates (Avanesov et al, 1997;Chen & Boulon, 2003; Padlyak et al, ISSN 2052-5206 # 2015 International Union of Crystallography 2003; Głuchowski et al, 2009), aluminates (Gurov et al, 2008), borates (De Backer et al, 2003;Brik et al, 2007), fluorides (Torchia et al, 2002;Tanner, 2004;da Silva et al, 2006) and oxides (Kü ck et al, 2000;Patra et al, 2005). Moreover, it has been proven that Cr 3+ -doped NaAl(WO 4 ) 2 (Nikolov, 2004) and KAl(MoO 4 ) 2 (Wang et al, 2008) crystals are suitable laser hosts having high absorption, efficient pumping and broad laser emission.…”

Section: Introductionmentioning

confidence: 99%

Structural insights intoM₂O–Al₂O₃–WO₃(M= Na, K) system by electron diffraction tomography

Andrusenko

Krysiak

Mugnaioli

et al. 2015

Acta Crystallogr Sect B

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The M2O-Al2O3-WO3 (M = alkaline metals) system has attracted the attention of the scientific community because some of its members showed potential applications as single crystalline media for tunable solid-state lasers. These materials behave as promising laser host materials due to their high and continuous transparency in the wide range of the near-IR region. A systematic investigation of these phases is nonetheless hampered because it is impossible to produce large crystals and only in a few cases a pure synthetic product can be achieved. Despite substantial advances in X-ray powder diffraction methods, structure investigation on nanoscale is still challenging, especially when the sample is polycrystalline and the structures are affected by pseudo-symmetry. Electron diffraction has the advantage of collecting data from single nanoscopic crystals, but it is frequently limited by incompleteness and dynamical effects. Automated diffraction tomography (ADT) recently emerged as an alternative approach able to collect more complete three-dimensional electron diffraction data and at the same time to significantly reduce dynamical scattering. ADT data have been shown to be suitable for ab initio structure solution of phases with large cell parameters, and for detecting pseudo-symmetry that was undetected in X-ray powder data. In this work we present the structure investigation of two hitherto undetermined compounds, K5Al(W3O11)2 and NaAl(WO4)2, by a combination of electron diffraction tomography and precession electron diffraction. We also stress how electron diffraction tomography can be used to obtain direct information about symmetry and pseudo-symmetry for nanocrystalline phases, even when available only in polyphasic mixtures.

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Silicate crystals for infra-red lasers

Cited by 11 publications

References 3 publications

Bulk crystal growth and efficient diode-pumped laser performance of Yb3+:Sc2SiO5

Bulk crystal growth and efficient diode-pumped laser performance of Yb3+:Sc2SiO5

Парамагнитные центры хрома в кристаллах Y-=SUB=-2-=/SUB=-SiO-=SUB=-5-=/SUB=- и Sc-=SUB=-2-=/SUB=-SiO-=SUB=-5-=/SUB=-

Structural insights intoM₂O–Al₂O₃–WO₃(M= Na, K) system by electron diffraction tomography

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Silicate crystals for infra-red lasers

Cited by 11 publications

References 3 publications

Bulk crystal growth and efficient diode-pumped laser performance of Yb3+:Sc2SiO5

Bulk crystal growth and efficient diode-pumped laser performance of Yb3+:Sc2SiO5

Парамагнитные центры хрома в кристаллах Y-=SUB=-2-=/SUB=-SiO-=SUB=-5-=/SUB=- и Sc-=SUB=-2-=/SUB=-SiO-=SUB=-5-=/SUB=-

Structural insights intoM2O–Al2O3–WO3(M= Na, K) system by electron diffraction tomography

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Structural insights intoM₂O–Al₂O₃–WO₃(M= Na, K) system by electron diffraction tomography