Spectroscopic and 1.06μm laser properties of Nd3+-doped K–Sr–Al phosphate and fluorophosphate glasses

Kumar, K. Upendra; Babu, P. Suresh; Jang, Kyoung Hyuk; Seo, Hyo Jin; Jayasankar, C.K.; Joshi, A S

doi:10.1016/j.jallcom.2007.04.035

Cited by 66 publications

(30 citation statements)

References 29 publications

(62 reference statements)

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“…Among these glasses, phosphate glass has several advantages over conventional silicate and borate glasses due to their superior physical properties such as high thermal expansion coefficient, low melting and softening temperatures and high ultraviolet transmission [6,7]. The low phonon energy of the fluorophosphate glasses yields low non-radiative decay and high radiative emission rates of RE ion energy levels, leading to much higher quantum efficiencies [8].…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic and laser properties of Sm3+ doped different phosphate glasses

Seshadri

Rao

et al. 2009

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Spectroscopic and laser properties of Sm3+ doped different phosphate glasses

Seshadri

Rao

et al. 2009

Journal of Alloys and Compounds

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“…The values of activation energy of relaxation are approximately equal to the activation energy of dc conductivity ΔE dc , as presented in table [2] . It is noticed that sample 1did not show ω max , which may be explained on the basis that the sample is having a maximum at lower frequency than the measured range.…”

Section: The Dielectric Constant ε \ and The Dielectric Loss Tan δmentioning

confidence: 96%

“…low glass transition temperature (T g ), optimizing coefficient of thermal expansion and high UV transmission. Owing to these features, many studies have been conducted on the various properties and structure of phosphate glasses [2][3][4]. Oxide glasses containing transition metal ions (TMI) are of great interest, because of their technological applications.…”

Section: Introductionmentioning

confidence: 99%

Dielectric properties and scaling behavior of lithium tungsten phosphate glasses

Shaaban

2012

J Electroceram

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In the present study a series of ternary (30 Li 2 O, (70-x) P 2 O 5 , xWO3) glasses were prepared and their dielectric properties and ac conductivity were investigated. The measurements have been taken in the frequency range from 100 Hz to 100 kHz and over the temperature range from 296 K to 578 K. The temperature dependence of ac conductivity can be adequately explained by considering the contributions from mixed ionic and electronic mechanisms. In the studied glasses it is found that the ac conductivity increases with increasing frequency. By investigating the relation between temperature and the frequency exponent "s" of the power law σ ac 0Aω s , it is found that the Correlated Barrier Hopping model (CBH) is appropriate for describing the conduction mechanism in the samples. In an attempt to investigate the universality of ac conductivity in these glasses, it is found that the data obtained follow Rolling scaling model. When considering the dielectric properties, it is found that the M″vs. M′ plots give master ColeCole curves at all temperatures. These results can be considered as an indication of the presence of space charge or accumulation of charges in some regions inside the samples. The relation between M″/ M max″ and f/f p represent a master plot at different temperatures. These scaling suggest the existence of a distribution of potential wells, in which the carriers are trapped.

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“…Generally, the laser medium candidate based on Nd 3+ doped phosphate glasses showed that the average magnitude distribution of the emission cross section are approximately 4.0 x10 -20 cm 2 to 5.0 x10 -20 cm 2 . In the case of phosphate glasses as a laser medium candidate, the radiative parameters and performance of the laser can be improved by using fluorophosphate glass as host matrix [2,5,7,10,19].…”

Section: Oscillator Strength and Judd-ofelt Parametersmentioning

confidence: 99%

Optical Properties of Nd3+ Doped Phosphate Glasses at 4F3/2 -> 4I11/2 Hypersensitive Transitions

Rajagukguk¹,

Djamal²,

.R³

et al. 2016

J. Pure App. Chem. Res.

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The lasing transition 4 F 3/2  4 I 11/2 for Nd 3+ doped phosphate glass centered around 1.05 -1.07m is referred as hypersensitive transition. The radiative properties such as effective line width ( eff ), radiative transition probability (A R ), branching ratio ( R ), radiative lifetime ( R ), quantum efficiency () and stimulated emission cross section have been obtained for several phosphate and fluorophosphate glass contained Nd 3+ . The experimental and calculated oscillator strength were used to analysis Judd-Ofelt parameters ( 2 ,  4 and  6 ) also to predict the quality of factor . The phosphate glass material with the approximately 69P 2 O5-15Na 2 O-15K 2 O-1Nd 2 O 3 composition at 4 F 3/2  4 I 11/2 transition is suitable for laser medium. The enhanced radiative transition probability as well as branching ratio and stimulated emission cross section in this glass are 3694 s -1 , 52% and 8.67 x10 -20 cm 2 respectively. As in commercial laser, the magnitudes of the emission cross section in this study achieved in the range 4.0-5.0 x 10 -20 cm 2 .

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Spectroscopic and 1.06μm laser properties of Nd3+-doped K–Sr–Al phosphate and fluorophosphate glasses

Cited by 66 publications

References 29 publications

Spectroscopic and laser properties of Sm3+ doped different phosphate glasses

Spectroscopic and laser properties of Sm3+ doped different phosphate glasses

Dielectric properties and scaling behavior of lithium tungsten phosphate glasses

Optical Properties of Nd3+ Doped Phosphate Glasses at 4F3/2 -> 4I11/2 Hypersensitive Transitions

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