Judd–Ofelt theory: optical absorption and NIR emission spectral studies of Nd3+:CdO–Bi2O3–B2O3 glasses for laser applications

Raju, C. Nageswara; Reddy, C. A.; Sailaja, S.; Seo, Hyo Jin; Reddy, B. Sudhakar

doi:10.1007/s10853-011-5853-5

Cited by 45 publications

(9 citation statements)

References 25 publications

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“…A higher σ E P is always desired for lasers with low threshold and high gain. It is noteworthy to mention that in the synthesized borophosphate matrix, transition values were much better than those reported for different hosts such as borate, phosphate, [53] silicate [54] , and germinate. [27] For all the glass compositions studied here, both the optical gain bandwidth and optical gain parameter values were higher for the 4 observed for the 0.5 mol% Nd 3+ -doped glass, suggesting it is an ideal system for high gain laser applications.…”

Section: Judd-ofelt Analysis and Radiative Parametersmentioning

confidence: 53%

“…The obtained Ω 2 value of the Nd0.5 glass was found to be lower than that of Nd-doped in other hosts. [27,53,54] Ω 6 having the maximum value is indicative of significant electron-phonon interaction between RE ions and ligands. [55] The higher the value of Ω 6 , the stronger is the coupling between the 4f and 5d orbitals that increases the 4f-4f absorption transitions.…”

Section: Judd-ofelt Analysis and Radiative Parametersmentioning

confidence: 99%

“…Both β M and β R (calculated based on JO theory) were observed to be higher than those reported for Nd 3+ -doped glass. [27,53,54] Among the prepared glass, a higher branching ratio corresponding to the 4 F 3/2 ! 4 I 11/2 transition (β R ≥ 0.50) was observed for 0.5 mol% Nd 3+ :SBP glass, suggesting its possible use for laser applications.…”

Section: Judd-ofelt Analysis and Radiative Parametersmentioning

confidence: 99%

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Structural and spectroscopic investigations of neodymium‐doped strontium borophosphate glass

et al. 2021

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Neodymium-doped glass finds application in lasers with high energy and low pulse width. In the present study, a series of Nd 3+ ions (0-2 mol%)-doped strontium borophosphate (SBP) glass samples was prepared through the conventional melt quench method. A broad peak in the X-ray diffraction spectrum confirmed the formation of a single-phase amorphous borophosphate glass. Fourier transform infrared spectra of the doped and undoped glass samples indicated the presence of borate and phosphate groups that form the anionic network. The thermal properties of the glass samples were determined from thermogravimetry/differential thermal analysis.Photoluminescence and ultraviolet-visible light techniques were used to investigate the optical properties of the as-prepared SBP:Nd glass. The Judd-Ofelt (JO) intensity parameters Ω λ (2, 4, 6), stimulated emission cross-section, branching ratios, and transition probabilities of the Nd 3+ -doped glass were obtained through the JO analysis.Characteristic Nd 3+ emission peaks were observed at 1330, 1060, and 876 nm, corresponding to the 4 F 3/2 ! 4 I S/2 (S = 13, 11, and 9) transitions, respectively. The suitability of SBP:Nd (0.5 mol%) glass for use in solid-state lasers was demonstrated by its intense luminescence, high transition probability, high emission cross-section, optical gain, and luminescence branching ratio.

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Section: Judd-ofelt Analysis and Radiative Parametersmentioning

confidence: 53%

Section: Judd-ofelt Analysis and Radiative Parametersmentioning

confidence: 99%

Section: Judd-ofelt Analysis and Radiative Parametersmentioning

confidence: 99%

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Structural and spectroscopic investigations of neodymium‐doped strontium borophosphate glass

et al. 2021

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“…21 As a representative sample, the data of LiGd 5 P 2 O 13 : 0.2Eu 3+ was analyzed by Judd-Ofelt theory. 20 The Judd-Ofelt intensity parameters (U 2,4 ) provide valuable information about the local structure and bonding in the vicinity of rare earth ions.…”

Section: Judd-ofelt Parameters and Radiative Propertiesmentioning

confidence: 99%

Synthesis, photoluminescence and Judd–Ofelt analysis of red LiGd₅P₂O₁₃ : Eu³⁺ phosphors for white LEDs

et al. 2015

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A series of LiGd 5 P 2 O 13 : Eu 3+ phosphors with a red-emitting band centered at 622 nm were synthesized by a high temperature solid-state reaction method. Structure-luminescence correlation, concentration quenching and thermal stability of the LiGd 5 P 2 O 13 : Eu 3+ phosphors were studied combined with XRD, PL/PLE spectra as well as temperature-dependent PL and decay curves. The optimum concentration of Eu 3+ doped in the LiGd 5 P 2 O 13 is 20 mol%, and the corresponding concentration quenching mechanism is found to be via dipole/quadrupole-quadrupole interactions. Intensity parameters (U 2 and U 4 ) andvarious radiative properties such as transition rates (A), branching ratios (b) and stimulated emission cross-section (d e ) were calculated using the Judd-Ofelt theory. LiGd 5 P 2 O 13 : Eu 3+ exhibited good thermal stability and its emission intensity decreased slightly at temperature above 150 C. The CIE coordinates of LiGd 5 P 2 O 13 : 0.20Eu 3+ (0.644, 0.339) are very close to s-RGB standard red (0.640, 0.330), and the corresponding quantum efficiency is 46.5%. The results show that LGPO : Eu 3+ may be considered as a potential red emitting phosphor for NUV/blue pumped WLEDs.

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“…The Judd-Ofelt parameters along with refractive index (n) were used to calculate the radiative parameters, including the radiative transition probability (A R ), the branching ratio (b R ), the radiative lifetime (s R ), and the simulated emission cross-section r(k p ) by using the following expression from [27,34].…”

Section: Radiative Parametersmentioning

confidence: 99%

Spectroscopic properties of Sm3+-doped oxy-fluoride powders with various Sm3+ concentration and sintering temperature

et al. 2015

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Judd–Ofelt theory: optical absorption and NIR emission spectral studies of Nd3+:CdO–Bi2O3–B2O3 glasses for laser applications

Cited by 45 publications

References 25 publications

Structural and spectroscopic investigations of neodymium‐doped strontium borophosphate glass

Structural and spectroscopic investigations of neodymium‐doped strontium borophosphate glass

Synthesis, photoluminescence and Judd–Ofelt analysis of red LiGd₅P₂O₁₃ : Eu³⁺ phosphors for white LEDs

Spectroscopic properties of Sm3+-doped oxy-fluoride powders with various Sm3+ concentration and sintering temperature

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Judd–Ofelt theory: optical absorption and NIR emission spectral studies of Nd3+:CdO–Bi2O3–B2O3 glasses for laser applications

Cited by 45 publications

References 25 publications

Structural and spectroscopic investigations of neodymium‐doped strontium borophosphate glass

Structural and spectroscopic investigations of neodymium‐doped strontium borophosphate glass

Synthesis, photoluminescence and Judd–Ofelt analysis of red LiGd5P2O13 : Eu3+ phosphors for white LEDs

Spectroscopic properties of Sm3+-doped oxy-fluoride powders with various Sm3+ concentration and sintering temperature

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Synthesis, photoluminescence and Judd–Ofelt analysis of red LiGd₅P₂O₁₃ : Eu³⁺ phosphors for white LEDs