Vibrational and EPR spectroscopic investigation of heavy‐metal‐oxide glasses and vitroceramics containing manganese

Simon, S.; Baia, Lucian; Radu, A.

doi:10.1002/jrs.1460

Cited by 10 publications

(13 citation statements)

References 32 publications

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“…1 The glasses based on Bi 2 O 3 are also promising hosts for rare-earth doping owing to small multi-phonon relaxations allowing efficient fluorescence emissions. 2,3 Among HMOG, the glasses originating from the PbO-Bi 2 O 3 -B 2 O 3 system represent very attractive materials because of (1) the existence of a rather large glass-forming region, 4 described later in greater detail, 5 (2) interesting nonlinear optical properties 6 and (3) promising properties such as -ray shielding.…”

Section: Introductionmentioning

confidence: 99%

“…Whereas B 2 O 3 is typical network-forming oxide, Bi 2 O 3 is assumed to be an unconventional networkforming oxide and PbO, depending on its content, can take the role of a network former also. 1,8 Properties such as high linear refractive index, high non-linear optical susceptibility and convenient optical gap values of PbO-Bi 2 O 3 -B 2 O 3 glasses are described in the than 98%, Sigma Aldrich). Stoichiometric amounts of oxides, 22 g batches, were mixed and homogenized in Pt crucibles and melted for about 20 min in a preheated electrical furnace at the temperature T ³ 800°C.…”

Section: Introductionmentioning

confidence: 99%

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Raman studies and optical properties of some (PbO)_x(Bi₂O₃)_0.2(B₂O₃)_0.8−x glasses

Kotkova

Tichá

Tichý

2008

J Raman Spectroscopy

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Five (PbO) x (Bi 2 O 3 ) 0.2 (B 2 O 3 ) 0.8−x glasses, where x = 0, 0.2, 0.3, 0.4 and 0.6, were prepared. The dilatometric glass transition temperature (T g ) was found in the region 470 .x = 0/ ½ T g (°C) ½ 347 (x = 0.6), and the density (r) varied within 4.57 .x = 0/ Ä r (g/cm 3 ) Ä 8.31 (x = 0.6). Raman spectra indicated the conversion of BO 3 to BO 4 entities for low x values but for x > 0.3, namely, for x → 0.6, back-conversion occurred, most probably. From the measurements of the optical transmission on very thin bulk samples, the room temperature optical gap values (E g ) were determined to be in the range 4.03 .x = 0/ ½ E g (eV) ½ 3.08 (x = 0.6). The temperature (T) dependence of the optical gap (E g (T)) in the region 300 Ä T(K) Ä 600 was examined and approximated by a linear relationship of the form of E g .T/ = E g .0/ − gT, where g × 10 −4 (eV/K) varied from 5.1 to 6.8. The non-linear refractive index (n 2 ) was estimated from the optical gap values and it was found to correspond to the n 2 values calculated from the experimental third-order non-linear optical susceptibility taken from the literature.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Raman studies and optical properties of some (PbO)_x(Bi₂O₃)_0.2(B₂O₃)_0.8−x glasses

Kotkova

Tichá

Tichý

2008

J Raman Spectroscopy

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“…These bands of the BGG sample around 311. 5 [27,28]. According to the analysis of the Raman spectrum, the phonon energy of the BGG samples can be presumed (about 400 cm −1 ), which is lower than the tellurite (about 770 cm −1 ) [15] and germanate (about 800 cm −1 ) [29] glass.…”

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confidence: 96%

Intense 27 µm emission and structural origin in Er^3+-doped bismuthate (Bi_2O_3-GeO_2-Ga_2O_3-Na_2O) glass

Guo

et al. 2012

Opt. Lett.

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The 2.7 μm emission properties in Er 3 -doped bismuthate (Bi 2 O 3 -GeO 2 -Ga 2 O 3 -Na 2 O) glass were investigated in the present Letter. An intense 2.7 μm emission in Er 3 -doped bismuthate glass was observed. It is found that Er 3 -doped bismuthate glass possesses high spontaneous transition probability A (65.26 s −1 ) and large 2.7 μm emission cross section σ em (9.53 × 10 −21 cm 2 ) corresponding to the stimulated emission of Er 3 : 4 I 11∕2 → 4 I 13∕2 transition. The emission characteristic and energy transfer process upon excitation of a conventional 980 nm laser diode in bismuthate glass were analyzed. Additionally, the structure of bismuthate glass was analyzed by the Raman spectrum. The advantageous spectroscopic characteristics of Er 3 single-doped bismuthate glass together with the prominent thermal property indicate that bismuthate glass might become an attractive host for developing solid-state lasers around 2.7 μm. © 2012 Optical Society of America OCIS codes: 160.5690, 260.3060, 160.4670, 160.2750, 300.6280. Owing to the strong absorption of radiation by water at the 2.7 μm region, considerable effort has been contributed to the erbium (Er 3 ) 2.7 μm lasers in view of the possible applications in medicine, sensing, and military countermeasures as well as light detection and ranging (LIDAR) in recent decades [1][2][3]. It is well known that two essential factors should be considered in developing more efficient optical devices based on rare-earth ions, including the active ions and the host [4]. The active ions, transition of 4 I 11∕2 → 4 I 13∕2 of Er 3 ion, is "self-terminating," which possesses a shorter upper-level lifetime and lower spontaneous transition probability (about 30 s −1 in fluoride) [5]. The host glass materials for mid-IR lasers are expected to possess a minimal absorption coefficient in the typical H 2 O absorption band at 3 μm, low nonradiative decay rates, high radiative emission rates, and compatibility with waveguide fabrication processes for the majority of applications [5,6].In order to get powerful 2.7 μm mid-IR emission from Er 3 ions, fluoride, chalcogenide, fluorophosphates, and heavy metal oxide (tellurite and germanate) based glasses as well as glass ceramics have been investigated, and fluoride glasses have emerged as natural candidates for such rare-earth-doped optical devices [5][6][7][8][9][10][11][12]. However, fluoride glasses require a more stringently controlled fabrication and have a relatively poor thermal stability [13]. Therefore, the heavy metal oxide glasses, germanate, tellurite, and bismuthate glasses attract high interest owing to their excellent solubility for rare-earth ions, lower phonon energy, higher refractive index, higher glass transition temperature, and good IR transmission [14][15][16][17]. Among above-mentioned host, there are still no reports on 2.7 μm emission in Er 3 -doped bismuthate glass up to now.The 2.7 μm emission in Er 3 -doped bismuthate (Bi 2 O 3 -GeO 2 -Ga 2 O 3 -Na 2 O) glasses are studied in the present Letter. Addition...

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“…Simon et al 22 investigated heavy-metal-oxide glasses and vitroceramics by means of infrared absorption, Raman, and EPR spectroscopy. The local structure of the glasses has been determined, demonstrating the great capability of these techniques in structural analysis of amorphous and partially crystallized materials.…”

Section: Materials Sciencesmentioning

confidence: 99%

Raman spectroscopy at the beginning of the twenty‐first century

Schmitt

Popp

2006

J Raman Spectroscopy

169

122

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Vibrational and EPR spectroscopic investigation of heavy‐metal‐oxide glasses and vitroceramics containing manganese

Cited by 10 publications

References 32 publications

Raman studies and optical properties of some (PbO)_x(Bi₂O₃)_0.2(B₂O₃)_0.8−x glasses

Raman studies and optical properties of some (PbO)_x(Bi₂O₃)_0.2(B₂O₃)_0.8−x glasses

Intense 27 µm emission and structural origin in Er^3+-doped bismuthate (Bi_2O_3-GeO_2-Ga_2O_3-Na_2O) glass

Raman spectroscopy at the beginning of the twenty‐first century

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Vibrational and EPR spectroscopic investigation of heavy‐metal‐oxide glasses and vitroceramics containing manganese

Cited by 10 publications

References 32 publications

Raman studies and optical properties of some (PbO)x(Bi2O3)0.2(B2O3)0.8−x glasses

Raman studies and optical properties of some (PbO)x(Bi2O3)0.2(B2O3)0.8−x glasses

Intense 27 µm emission and structural origin in Er^3+-doped bismuthate (Bi_2O_3-GeO_2-Ga_2O_3-Na_2O) glass

Raman spectroscopy at the beginning of the twenty‐first century

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Raman studies and optical properties of some (PbO)_x(Bi₂O₃)_0.2(B₂O₃)_0.8−x glasses

Raman studies and optical properties of some (PbO)_x(Bi₂O₃)_0.2(B₂O₃)_0.8−x glasses