On the influence of dopant ions on blue emission in kgw crystal excited by infrared laser radiation

Ходасевич, И. А.; Корниенко, А. А.; Дунина, Е. Б.; Grabtchikov, A. S.

doi:10.1007/s10812-012-9561-y

Cited by 6 publications

(3 citation statements)

References 14 publications

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“…3 shows the spectrum of visible fluorescence emitted transversely from the KGW crystal. An intense peak at 475 nm is seen as in many other studies [24,25] as well as smaller peaks at 645 nm and 795 nm. This emission is attributed to multi-photon upconversion in impurities such as thulium in the KGW crystal [26].…”

Section: Output Power Characteristicssupporting

confidence: 83%

High power tungstate-crystal Raman laser operating in the strong thermal lensing regime

McKay¹,

Kitzler²,

Mildren³

2014

Opt. Express

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We report an investigation into a double metal tungstate Raman laser when pumped at elevated average powers. Potassium gadolinium tungstate (KGW) was placed in an external cavity configured for second-Stokes output and pumped at pulse repetition rate of 38 kHz with up to 46 W of average power. For output powers above 3 W, we observe preferential excitation of Hermite-Gaussian transverse modes whose order in the X(1)(') principal direction of the thermal expansion tensor scales linearly with Raman power. We deduce that strong astigmatic thermal lensing is induced in the Raman crystal with a negative component in the X(1)(') direction. At maximum pump power, 8.3 W of output power was obtained at a conversion efficiency of 18%.

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Section: Output Power Characteristicssupporting

confidence: 83%

High power tungstate-crystal Raman laser operating in the strong thermal lensing regime

McKay¹,

Kitzler²,

Mildren³

2014

Opt. Express

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show abstract

“…Recently, two works were published discussing specifically the blue emission [129,130]. Zhu et al [129], characterized the emission in three crystals, YVO 4 In all the cases reported, the groups were looking for the origin of the phenomenon,…”

Section: Introduction To the Problemmentioning

confidence: 99%

“…However, they could not explain the origin of the emission. In[130], Kodasevich et al made a deeper analyses of the phenomenon, comparing the experimental emission from a KGW crystal with the expected shape obtained by calculation for a Nd:KGW crystal and a Tm:YLF crystal. As a result, they found more similarities with the Neodymium emission band around 475 nm than with the Thulium one, although it was not enough to state that Nd 3+ is the responsible for such emission.…”

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confidence: 99%

Lasers de Nd:YLF de baixo ganho operando na transição de quase-três níveis e em lasers Raman

Neto¹

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Lasers operating in the blue and yellow-orange spectral regions are sought after by the applications market either to improve well known technologies or to enable new ones. Blue lasers bring features such as high energy photons and smaller diffraction limited beams, while the yellow-orange range is a hard to reach spectral region where there is a considerable shortage of efficient laser light sources. Applications of the blue lasers are found in high density storage technologies, laser displays, LIDAR systems, optical tweezers and a long range of high precision demanding applications. The yellow-orange lasers also have important applications, with highlights in ophthalmologic laser surgery (photocoagulation), in "true" color displays and as a guide star (exciting sodium lines in the atmosphere). The investigation of Nd:YLF quasi-three level lasers and Nd:YLF Raman lasers was further studied in this work in order to provide high power and efficient blue and yellow lasers sources. Demonstrations of efficient and multi-Watt operation of a 908 nm laser and its respective second harmonic laser at 454 nm are described. Also, Nd:YLF/BaWO4 and Nd:YLF/KGW Raman lasers were demonstrated reaching Watt levels in quasi-CW and CW regime with very good beam qualities (M 2 ≤ 2

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Blue luminescence in YVO4 and KGd(WO4)2 crystals excited by CW 1064-nm radiation

et al. 2015

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On the influence of dopant ions on blue emission in kgw crystal excited by infrared laser radiation

Cited by 6 publications

References 14 publications

High power tungstate-crystal Raman laser operating in the strong thermal lensing regime

High power tungstate-crystal Raman laser operating in the strong thermal lensing regime

Lasers de Nd:YLF de baixo ganho operando na transição de quase-três níveis e em lasers Raman

Blue luminescence in YVO4 and KGd(WO4)2 crystals excited by CW 1064-nm radiation

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