Growth and spectral properties of Tm3+-doped NaGd(WO4)2 crystal

Wang, H.; Jia, Guohua; Yang, Fugui; Wei, Yanping; You, Zhenyu; Wang, Y.; Li, J.; Zhu, Zhaojie; Lu, Xinliang; Tu, Chaoyang

doi:10.1007/s00340-006-2209-y

Cited by 25 publications

(21 citation statements)

References 29 publications

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“…These peaks are suitable for diode-pumping and their σ a are slightly higher than those of Tm:KGd(WO 4 ) 2 (KGdW) [18], Tm:KY(WO 4 ) 2 (KYW) [19] and Tm:KYb(WO 4 ) 2 (KYbW) [20] and almost twice as the high as that the disordered tungstate Tm:NaGd(WO 4 ) 2 (NGdW) [21,22].…”

Section: × 10mentioning

confidence: 99%

Thulium doped monoclinic KLu(WO4)2 single crystals: growth and spectroscopy

et al. 2007

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Section: × 10mentioning

confidence: 99%

Thulium doped monoclinic KLu(WO4)2 single crystals: growth and spectroscopy

et al. 2007

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“…Very recently some thermomechanical properties of NaGdW like the thermal expansion and conductivity coefficients were studied. 12,13 The aim of the present work is to evaluate the potential for laser operation of Yb 3+ -doped NaGd͑WO 4 ͒ 2 or shortly Yb:NaGdW with special emphasis on the tunability which is related to the spectral linewidths. For this purpose the growth and the structural, optical, and spectroscopic properties of this crystal are studied for several Yb doping levels.…”

Section: Introductionmentioning

confidence: 99%

Structural, spectroscopic, and tunable laser properties ofYb3+-dopedNaGd(W
Cascales
¹
,
Serrano
²
,
Esteban‐Betegón
³

et al. 2006
Phys. Rev. B
142
4
81
0
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Single crystals of Yb 3+ -doped NaGd͑WO 4 ͒ 2 with up to 20 mol % ytterbium content have been grown by the Czochralski technique in air or in N 2 +O 2 atmosphere and cooled to room temperature at different rates ͑4-250°C/h͒. Only the noncentrosymmetric tetragonal space group I4 accounts for all reflections observed in the single crystal x-ray diffraction analysis. The distortion of this symmetry with respect to the centrosymmetric tetragonal space group I4 1 / a is much lower for crystals cooled at a fast rate. Na + , Gd 3+ , and Yb 3+ ions share the two nonequivalent 2b and 2d sites of the I4 structure, but Yb 3+ ͑and Gd 3+ ͒ ions are found preferentially in the 2b site. Optical spectroscopy at low ͑5 K͒ temperature provides additional evidence of the existence of these two sites contributing to the line broadening. The comparison with the 2 F 7/2 ͑n͒ and 2 F 5/2 ͑nЈ͒ Stark energy levels calculated using the crystallographic Yb-O bond distances allows to correlate the experimental optical bands with the 2b and 2d sites. As a novel uniaxial laser host for Yb 3+ , NaGd͑WO 4 ͒ 2 is characterized also with respect to its transparency, band-edge, refractive indices, and main optical phonons. Continuous-wave Yb 3+ -laser operation is studied at room temperature both under Ti:sapphire and diode laser pumping. A maximum slope efficiency of 77% with respect to the absorbed power is achieved for the polarization by Ti:sapphire laser pumping in a three-mirror cavity with Brewster geometry. The emission is tunable in the 1014-1079 nm spectral range with an intracavity Lyot filter. Passive mode locking of this laser produces 120 fs long pulses at 1037.5 nm with an average power of 360 mW at Ϸ97 MHz repetition rate. Using uncoated samples of Yb: NaGd͑WO 4 ͒ 2 at normal incidence in simple two-mirror cavities, output powers as high as 1.45 W and slope efficiencies as high as 51% are achieved with different diode laser pump sources.

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“…The values rms deviation was obtained to be 0.6 Â 10 À20 cm 2 in our work. The J-O intensity parameters comparisons between some Tm 3+ -doped crystals were shown in Table 2 [16][17][18][19].…”

Section: Resultsmentioning

confidence: 99%

The spectroscopy investigation of ZnWO4:Tm3+ single crystal

Yang

2012

Journal of Alloys and Compounds

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Growth and spectral properties of Tm3+-doped NaGd(WO4)2 crystal

Cited by 25 publications

References 29 publications

Thulium doped monoclinic KLu(WO4)2 single crystals: growth and spectroscopy

Thulium doped monoclinic KLu(WO4)2 single crystals: growth and spectroscopy

Structural, spectroscopic, and tunable laser properties ofYb3+-dopedNaGd(W
Cascales
¹
,
Serrano
²
,
Esteban‐Betegón
³

et al. 2006
Phys. Rev. B
142
4
81
0
View full text Add to dashboard Cite

The spectroscopy investigation of ZnWO4:Tm3+ single crystal

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Growth and spectral properties of Tm3+-doped NaGd(WO4)2 crystal

Cited by 25 publications

References 29 publications

Thulium doped monoclinic KLu(WO4)2 single crystals: growth and spectroscopy

Thulium doped monoclinic KLu(WO4)2 single crystals: growth and spectroscopy

Structural, spectroscopic, and tunable laser properties ofYb3+-dopedNaGd(WCascales1, Serrano2, Esteban‐Betegón3 et al. 2006Phys. Rev. B1424810View full textAdd to dashboardCite

The spectroscopy investigation of ZnWO4:Tm3+ single crystal

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Structural, spectroscopic, and tunable laser properties ofYb3+-dopedNaGd(W
Cascales
¹
,
Serrano
²
,
Esteban‐Betegón
³

et al. 2006
Phys. Rev. B
142
4
81
0
View full text Add to dashboard Cite