Optical spectroscopy and visible stimulated emission of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Dy</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>ions in monoclinic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>α</mml:mi><mml:mo>−</mml:mo><mml:mi mathvariant="normal">KY</mml:mi><mml:mo>(</mml:mo><mml:mrow><mml:msub><mml:

Kaminskii, Alexander A.; Gruber, John B.; Багаев, С. Н.; Ueda, Ken–ichi; Hömmerich, U.; Seo, Jaetae; Temple, D.; Zandi, Bahram; Корниенко, А. А.; Дунина, Е. Б.; Pavlyuk, A. A.; Клевцова, Р. Ф.; Kuznetsov, F. A.

doi:10.1103/physrevb.65.125108

Cited by 95 publications

(56 citation statements)

References 54 publications

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“…Over the past few years the SE generation of Dy 3+ ions as opposed to other Ln 3+ lasing activators in different types of crystals has been studied most productively (see, e.g. [127][128][129][130][131][132]). It is now possible to excite SE on interStark transitions of the seven 4f 9 -4f 9 channels (Fig.…”

Section: Laser Channels Of Dy 3+ Ionsmentioning

confidence: 99%

Laser crystals and ceramics: recent advances

Kaminskii

2007

Laser & Photonics Reviews

372

236

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After a brief examination of known insulating laser crystals and the stimulated emission channels of their generating activator ions, this article reviews recent advances in the development of novel lasing crystals and ceramics, as well as inorganic and organic nonlinear-laser crystals for χ (3) and cascaded χ (3) ↔ χ (2) frequency converters. Several new modern attractive technologies in the physics and techniques of crystalline lasers are also discussed.Section of the crystal structure of Na3Li (SeO4)

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Section: Laser Channels Of Dy 3+ Ionsmentioning

confidence: 99%

Laser crystals and ceramics: recent advances

Kaminskii

2007

Laser & Photonics Reviews

372

236

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“…This so-called 'eye-safe' spectral range is attractive for realization of high frequency range finders at 1.54 µm, and atmospheric CO 2 monitoring [10] at 1.57-1.6 µm (via Raman conversion in Ba(NO 3 ) 2 ). Power scaling in tungstates is, however, limited compared to Nd:YAG lasers, as the thermal conductivity coefficients are approximately 3 times lower [5]. Commercially available N p -cut Nd:KGW possess strong cylindrical thermal lensing [11], which is difficult to compensate by cavity design alone or by means of adaptive optics [12].…”

Section: Introductionmentioning

confidence: 99%

“…Neodymium-doped KGd(WO 4 ) 2 (KGW) is a well known laser material with extensively investigated spectroscopic properties (see [1][2][3][4][5] and references therein). Nd:KGW has good prospects for self-Raman conversion to 1.54 µm [7,8] due to the relatively high emission cross-section at ~1.35 µm (7.6 × 10 −20 cm 2 [6]) also in combination with a high Raman gain coefficient (up to 4.4 cm/GW [1]).…”

Section: Introductionmentioning

confidence: 99%

Thermal lens study in diode pumped Ng- and Np-cut Nd:KGd(WO_4)_2 laser crystals

Loiko¹,

Yumashev²,

Кулешов³

et al. 2009

Opt. Express

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Abstract.A comparative study of thermal lensing effect in diode laser pumped N g -and N p -cut Nd:KGd(WO 4 ) 2 (KGW) laser crystals was performed for laser emission polarized along the principle refractive axis, N m . The thermal lens in the N g -cut Nd: KGW was found to be weakly astigmatic with a positive refractive power for both the N m -and N pdirections. For N p -cut Nd:KGW, strong astigmatism was observed and the refractive powers in the N g -and N m -directions had opposing signs. The degree of astigmatism was found to be considerably weaker for the N g -cut Nd:KGW in comparison with the N p -cut one: 0.35 dptr/(W/cm 2 ) and 2.85 dptr/(W/cm 2 ), respectively. The ratio of the thermal lens refractive powers in the planes parallel and perpendicular to the laser emission polarisation were measured as + 1.4 and −0.425 for N g -and N p -cut Nd:KGW respectively.

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“…Of the solid-state matrices doped with trivalent rare-earth ions used as laser media and phosphors, crystalline potassium-gadolinium tungstate KGd(WO 4 ) 2 (referred to as KGW in the following) is exceptional. Crystalline KGW can be doped with isolated ions of Nd 3+ , Yb 3+ , Er 3+ , Ho 3+ , Tm 3+ , Pr 3+ , Dy 3+ , Eu 3+ [1][2][3][4][5][6][7] or their combinations, such as Er and Yb [8], Ho and Tm [9], Yb, Ho, Er, and Tm [10], etc. Since the ionic radius of the replaced Gd 3+ ion is close to the ionic radii of the other lanthanoids, the concentration of impurity centers in a KGW crystal can be quite high without causing signifi cant bulk deformations of the crystal lattice.…”

mentioning

confidence: 99%

Diode-Pumped Nd:KGd(WO4)2 Laser: Lasing at Fundamental and Second Harmonic Frequencies

et al. 2015

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High-power cw and quasi-cw lasing at the fundamental and second harmonic frequencies is obtained from Nd:KGd(WO 4 ) 2 lasers based on N p -and N g -cut crystals pumped longitudinally by a diode laser at 879 nm. Because of different crystal lengths, the limiting pump power beyond which the crystals undergo thermomechanical damage is 26.8 W for the N p -cut and 17.3 W for the N g -cut. At these pump powers the cw outputs at λ = 1067.2 nm are 9.4 and 5.4 W, respectively, and the N g -cut crystal output is TEM 00 at the fundamental frequency. With quasicontinuous pumping at a 10% duty cycle the instantaneous laser power reaches ~11 W for both cuts with a periodic duration of 10-20 ms. The differential lasing effi ciency relative to the absorbed pump power is 66.4% for cw lasing and 77.4% for quasi-cw operation. With intracavity frequency doubling using a KTP crystal, better results were obtained with the N g -cut crystal because of its simpler thermal lensing. The maximum second harmonic power was ~1.1 W for cw operation and ~2.6 W for quasi-cw operation with a diode laser power of 27.3 W.Introduction. Of the solid-state matrices doped with trivalent rare-earth ions used as laser media and phosphors, crystalline potassium-gadolinium tungstate KGd(WO 4 ) 2 (referred to as KGW in the following) is exceptional. Crystalline KGW can be doped with isolated ions of Nd 3+ , Yb 3+ , Er 3+ , Ho 3+ , Tm 3+ , Pr 3+ , Dy 3+ , Eu 3+ [1][2][3][4][5][6][7] or their combinations, such as Er and Yb [8], Ho and Tm [9], Yb, Ho, Er, and Tm [10], etc. Since the ionic radius of the replaced Gd 3+ ion is close to the ionic radii of the other lanthanoids, the concentration of impurity centers in a KGW crystal can be quite high without causing signifi cant bulk deformations of the crystal lattice. For example, in the well known and easily available laser medium Nd:KGW the concentration of neodymium ion ranges from 3-10 at.%. In addition, the KGW matrix is active with respect to induced combination (Raman) scattering. Because of this, Nd:KGW lasers with fl ashlamp and diode pumping operate both at the fundamental wavelengths of the 4 F 3/2 -4 I 11/2 and 4 F 3/2 -4 I 13/2 transitions (1067.2 [11-13] and 1351 nm [14][15][16]) and at the wavelengths of the Stokes components owing to Raman self-conversion of the fundamental frequency (1180 [17], 1500 [18], and 1538 nm [19]). The combination of Raman conversion with the second harmonic (SH) generation or combination frequency effect makes it possible to obtain coherent light in the yellow region of the spectrum at wavelengths λ = 560 [20] and 590 nm [21] from Nd:KGW lasers.Nd:KGW lasers with frequency doubling of the fundamental at λ = 1.0672 μm have been discussed in the literature [22]. The distinctive feature of these lasers (λ l = 533.6 nm) is that they are suitable for optical pumping of Eu:KReW (where Re = Gd, Y, Lu) active media [7,23,24]. Pumping is in the 7 F 1 -5 D 1 absorption band of the europium ion. With pumping by a pulsed (Q-switched) frequency doubled Nd:KGW laser, for the fi rst...

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Optical spectroscopy and visible stimulated emission ofDy3+ions in monoclinicα−KY(

Cited by 95 publications

References 54 publications

Laser crystals and ceramics: recent advances

Laser crystals and ceramics: recent advances

Thermal lens study in diode pumped Ng- and Np-cut Nd:KGd(WO_4)_2 laser crystals

Diode-Pumped Nd:KGd(WO4)2 Laser: Lasing at Fundamental and Second Harmonic Frequencies

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