Tm3+ and Yb3+ co-doped tellurite glasses for short cavity optical fiber lasers: Fabrication and optical characterization

Milanese, Daniel; Gebavi, Hrvoje; Lousteau, Joris; Ferraris, Monica; Schülzgen, Axel; Li, Li; Peyghambarian, N.; Taccheo, S.; Auzel, F.

doi:10.1016/j.jnoncrysol.2010.03.029

Cited by 13 publications

(12 citation statements)

References 13 publications

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“…For the growth of good quality UC based phosphor materials researchers have tried to incorporate different combinations of RE ions in suitable hosts [8][9][10][11]. Among the sensitizers, ytterbium ion serves as an admirable and most effective sensitizer in various oxides and halides based host materials [15][16][17]. Recently, the attention has been attracted towards a new complex inorganic host Na 2 Y 2 B 2 O 7 for the development of RE doped phosphor materials.…”

Section: Introductionmentioning

confidence: 99%

Stark sublevels in Tm³⁺–Yb³⁺ codoped Na₂Y₂B₂O₇ nanophosphor for multifunctional applications

2015

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Phase and crystal structure of the Na 2 Y 2 B 2 O 7 :Tm 3+ -Yb 3+ inorganic phosphor prepared by solution combustion method has been identified by powder X-ray diffraction technique.Surface morphology and particle size has been examined by using the field emission scanning electron microscopy and high resolution transmission electron microscopy characterizations of the prepared materials. No absorption band around 980 nm has been observed in the Tm 3+ doped phosphors, whereas a broad band around 980 nm in the Tm 3+ -Yb 3+ codoped phosphors corresponding to the 2 F 7/2 ← 2 F 5/2 absorption transition of Yb 3+ ion has been detected. The upconversion emission bands have been observed in the UV, visible and NIR regions upon excitation with 980nm laser diode. The temperature sensing behaviour and the concept of nanoheater in the developed nanophosphor has been demonstrated by using the stark sublevels of the 1 G 4 level of Tm 3+ ion, which is responsible for the blue upconversion emission. The maximum sensor sensitivity of about 4.54×10 -3 K -1 at 300 K for the developed multifunctional nanophosphor has been determined. The temperature gain of about ~435 K has been observed at laser power density of 66.88 W/cm 2 and the colour coordinates do not change with the variation of pump power density. For localizing and heating the hyperthermia based cancer cells by using the NIR radiation a very low pump power density of about ~7.0 W/cm 2 has been established. The experimental observations prove the developed material to be used as a multifunctional nanomaterial in optical devices and biological applications.

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Section: Introductionmentioning

confidence: 99%

Stark sublevels in Tm³⁺–Yb³⁺ codoped Na₂Y₂B₂O₇ nanophosphor for multifunctional applications

2015

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“…Although population of the 1 G 4 level requires a 3 photons process [8], population of the 3 F 2,3 and 3 H 4 levels can occur through excited state absorption from the 3 F 4 level. Not only, this two-step process requires solely 2 photons but also the "metastable or transitional" level 3 F 4 possesses a relatively long lifetime in tellurite glass, typically of the order of 2 ms, which favors the ESA process [24]. In other words, even for low incoming photon density level, 3 F 2,3 and 3 H 4 levels get populated while population of the more energetic level 1 G 4 remains limited.…”

Section: Resultsmentioning

confidence: 99%

Multiple visible emissions by means of up-conversion process in a microstructured tellurite glass optical fiber

Boetti¹,

Lousteau²,

Negro³

et al. 2012

Opt. Express

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We present a microstructured fiber whose 9 µm diameter core consists in three concentric rings made of three active glasses having different rare earth oxide dopants, Yb3+/Er3+, Yb3+/Tm3+ and Yb3+/Pr3+, respectively. Morphological and optical characterization of the optical fiber are presented. The photoluminescence spectrum is investigated for different pumping conditions using a commercial 980 nm laser diode. Tuning of the RGB (or white light) emission is demonstrated not only by adjusting the pump power but also by using an optical iris as spatial filter which, thanks to the microstructured core, also acts as a spectral filter.

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“…Tellurite glasses are very attractive materials for optical applications due to their good transmission in the midinfrared range (up to 6 μm). These glasses also exhibit high linear and nonlinear refractive indices and they can easily be doped with rare‐earth ions for laser applications . The first transparent tellurite glass‐ceramics were developed by Komatsu et al .…”

Section: Introductionmentioning

confidence: 99%

“…These glasses also exhibit high linear and nonlinear refractive indices and they can easily be doped with rare-earth ions for laser applications. 1,2 The first transparent tellurite glass-ceramics were developed by Komatsu et al at the beginning of the 1990s, in the system TeO 2 -LiNbO 3 3 in which they studied the second-order optical nonlinearity provided by the noncentrosymmetric crystalline phases. Indeed, due to their isotropic nature, glassy materials do not generate any second harmonic (SH) signal, which is one of the basic phenomena in nonlinear optics (NLO).…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Study of the Carbon Contamination in Tellurite Glasses and Glass‐Ceramics Sintered by Spark Plasma Sintering (SPS)

et al. 2013

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Highly transparent tellurite glasses and glass‐ceramics based on the 85TeO2–15WO3 composition (mol%) were produced by spark plasma sintering (SPS) from powders previously prepared by the conventional melt‐quenching technique and then grinded. We report a study based on the understanding of carbon contamination that is commonly observed by this nonconventional sintering technique and which constitutes a drawback for optical applications. First, the influence of the particle size of the initial amorphous powders as well as an additional pressureless sintering step prior to SPS experiments and the use of a physical carbon diffusion barrier have been investigated to reduce the carbon contamination in glass bulks. Second, once reducing the carbon contamination, glass‐ceramics were obtained by varying the SPS conditions. The noncentrosymmetric γ‐TeO2 phase crystallized within the bulk volume while maintaining good optical transparency and led to the generation of second harmonic. This approach paves the way to further applications in the domain of linear and nonlinear optics.

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Tm3+ and Yb3+ co-doped tellurite glasses for short cavity optical fiber lasers: Fabrication and optical characterization

Cited by 13 publications

References 13 publications

Stark sublevels in Tm³⁺–Yb³⁺ codoped Na₂Y₂B₂O₇ nanophosphor for multifunctional applications

Stark sublevels in Tm³⁺–Yb³⁺ codoped Na₂Y₂B₂O₇ nanophosphor for multifunctional applications

Multiple visible emissions by means of up-conversion process in a microstructured tellurite glass optical fiber

A Comprehensive Study of the Carbon Contamination in Tellurite Glasses and Glass‐Ceramics Sintered by Spark Plasma Sintering (SPS)

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Tm3+ and Yb3+ co-doped tellurite glasses for short cavity optical fiber lasers: Fabrication and optical characterization

Cited by 13 publications

References 13 publications

Stark sublevels in Tm3+–Yb3+ codoped Na2Y2B2O7 nanophosphor for multifunctional applications

Stark sublevels in Tm3+–Yb3+ codoped Na2Y2B2O7 nanophosphor for multifunctional applications

Multiple visible emissions by means of up-conversion process in a microstructured tellurite glass optical fiber

A Comprehensive Study of the Carbon Contamination in Tellurite Glasses and Glass‐Ceramics Sintered by Spark Plasma Sintering (SPS)

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Stark sublevels in Tm³⁺–Yb³⁺ codoped Na₂Y₂B₂O₇ nanophosphor for multifunctional applications

Stark sublevels in Tm³⁺–Yb³⁺ codoped Na₂Y₂B₂O₇ nanophosphor for multifunctional applications