Upconversion from the 4I13/2 and 4I11/2 levels in Er:YAG

Georgescu, S.; Toma, O.; Ivanov, Igor

doi:10.1016/j.jlumin.2004.11.009

Cited by 15 publications

(6 citation statements)

References 29 publications

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“…Some Nd 3þ : 4 I 15/2 ions will relax to their ground states (Nd 3þ : 4 I 9/2 ) via non-radiative processes, simultaneously, some of them may be excited to Nd 3þ : 4 F 5/2 , 2 H 9/2 via the energy transfer process 11,[28][29][30] Er 3þ : 4 I 13=2 þNd 3þ : 4 I 15=2 ! Er 3þ : 4 I 15=2 þNd 3þ : 4 F 2 5=2; H 9=2 :…”

Section: Resultsmentioning

confidence: 99%

Enhanced 2.7 μm emission and energy transfer mechanism of Nd3+/Er3+ co-doped sodium tellurite glasses

Guo,

Li,

Tian

et al. 2011

Journal of Applied Physics

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Articles you may be interested inEnhanced 2.7 μm emission from Er3+ doped oxyfluoride tellurite glasses for a diode-pump mid-infrared laser AIP Advances 4, 047101 (2014); 10.1063/1.4870581 Energy transfer characteristics of silicate glass doped with Er3+, Tm3+, and Ho3+ for 2μm emission J. Appl. Phys. 114, 243501 (2013); 10.1063/1.4852535 Infrared-to-visible upconversion emission in Er3+ doped TeO2-WO3-Bi2O3 glasses with silver nanoparticles J. Appl. Phys. 112, 063519 (2012); 10.1063/1.4754468 2.05 µm emission properties and energy transfer mechanism of germanate glass doped with Ho3+, Tm3+, and Er3+ J. Appl. Phys. 109, 053503 (2011); 10.1063/1.35538772.7 μ m emission of Nd 3 + , Er 3 + codoped tellurite glass 2.7 lm emission properties and energy transfer mechanism of Nd 3þ /Er 3þ co-doped sodium tellurite glasses are investigated in present paper. Absorption and emission spectra were tested to characterize the 2.7 lm emission properties of Nd 3þ /Er 3þ co-doped sodium tellurite glasses and a reasonable energy transfer mechanism of 2.7 lm emission between Er 3þ and Nd 3þ ions was proposed. Intense 2.7 lm emission was obtained from Nd 3þ /Er 3þ co-doped sodium tellurite glasses due to the efficient energy transfer from Nd 3þ to Er 3þ ions under 808 nm LD pumping. Meanwhile, strongly decreased 545 nm up-conversion and 1.5 lm emissions were observed. Additionally, to obtain efficient 2.7 lm emission, the optimized concentration ratio of Nd 3þ to Er 3þ was found to be 0.5:1 in present glass system. Our results suggest that the present Nd 3þ /Er 3þ co-doped sodium tellurite glass might have potential application in mid-infrared lasers.

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Section: Resultsmentioning

confidence: 99%

Enhanced 2.7 μm emission and energy transfer mechanism of Nd3+/Er3+ co-doped sodium tellurite glasses

Guo,

Li,

Tian

et al. 2011

Journal of Applied Physics

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“…To go further with this investigation and explain this energy drop, we carried out simulations of the pulse energy versus the repetition rate. The numerical model for AQS four-levels systems depicted in [17] has been modified for the erbium quasi-three-levels architecture with upconversion [18,19], laser reabsorption, and pump stimulated emission. Figure 5 gives the considered energy levels and rates.…”

Section: Description Of the Numerical Modelizationmentioning

confidence: 99%

Passively Q-switched Er:YAG laser operating at 1617 nm at low pump power level

et al. 2014

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International audienceWe carried out an experimental study of an Er:YAG laser that is passively Q-switched by Cr:ZnSe saturable absorb-ers and pumped at 1470 nm by a 14 W laser diode. The 1617 nm emission is selected by an appropriate combination of transmissions of the saturable absorber and of the output coupler. With an accurate comparison between actively Q-switched and passively Q-switched operations and with Cr:ZnSe transmission measurements, we demonstrated by experiments and by simulations that the output energy is strongly dependent on the Cr:ZnSe temperature. With a better cooling of the Cr:ZnSe crystal heated by residual pump and signal absorption, the energy per pulse can be doubled, from 110 to 220 μJ, at a repetition rate of 800 Hz

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“…The use of Y 3 Al 5 O 12 (YAG) doped with Er 3+ (YAG:Er 3+ ) is well established in applications such as planar waveguide amplifi ers, [ 1,2 ] near-infrared (NIR) lasers for biomedical use, [3][4][5][6][7] and up-conversion phosphors for IR detection by conversion to visible light. [8][9][10] The YAG:Er 3+ system has several absorption bands at around 490, 800, 970 and 1480 nm, [ 11,12 ] which allows the use of various pumping sources.…”

Section: Doi: 101002/adma201302288mentioning

confidence: 99%