The application of Ga : La : S-based glass for optical amplification at 1.3 μm

Neto, J. A. Medeiros; Taylor, Elizabeth R.; Samson, Bryce; Wang, J.; Hewak, Daniel W.; Laming, R.I.; Payne, D.N.; Tar, E.; Maton, P.; Roba, G.; Kinsman, B. E.; Hanney, R.

doi:10.1016/0022-3093(94)00627-x

Cited by 39 publications

(4 citation statements)

References 9 publications

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“…It is clearly seen that both excited levels 2 F 5/2 (Yb 3+ ) and 1 G 4 (Pr 3+ ) lie close to each other and the energy gap between them is very small. Moreover, the absorption cross-section at around 980 nm is larger for Yb 3+ than Pr 3+ ions, which is crucial for the pumping efficiency of praseodymium-doped fiber amplifiers PDFA [ 34 , 35 ]. Due to this fact, the energy transfer process Yb 3+ → Pr 3+ is nearly resonant and supposed to be much more efficient in titanate–germanate glass.…”

Section: Resultsmentioning

confidence: 99%

Near-IR Luminescence of Rare-Earth Ions (Er3+, Pr3+, Ho3+, Tm3+) in Titanate–Germanate Glasses under Excitation of Yb3+

et al. 2022

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Inorganic glasses co-doped with rare-earth ions have a key potential application value in the field of optical communications. In this paper, we have fabricated and then characterized multicomponent TiO2-modified germanate glasses co-doped with Yb3+/Ln3+ (Ln = Pr, Er, Tm, Ho) with excellent spectroscopic properties. Glass systems were directly excited at 980 nm (the 2F7/2 → 2F5/2 transition of Yb3+). We demonstrated that the introduction of TiO2 is a promising option to significantly enhance the main near-infrared luminescence bands located at the optical telecommunication window at 1.3 μm (Pr3+: 1G4 → 3H5), 1.5 μm (Er3+: 4I13/2 → 4I15/2), 1.8 μm (Tm3+: 3F4 → 3H6) and 2.0 μm (Ho3+: 5I7 → 7I8). Based on the lifetime values, the energy transfer efficiencies (ηET) were estimated. The values of ηET are changed from 31% for Yb3+/Ho3+ glass to nearly 53% for Yb3+/Pr3+ glass. The investigations show that obtained titanate–germanate glass is an interesting type of special glasses integrating luminescence properties and spectroscopic parameters, which may be a promising candidate for application in laser sources emitting radiation and broadband tunable amplifiers operating in the near-infrared range.

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Section: Resultsmentioning

confidence: 99%

Near-IR Luminescence of Rare-Earth Ions (Er3+, Pr3+, Ho3+, Tm3+) in Titanate–Germanate Glasses under Excitation of Yb3+

et al. 2022

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“…To date, optical properties of trivalent lanthanide ions such as Pr 3+ [1], Er 3+ [2,3], Tm 3+ [4], Ho 3+ [5] and Nd 3+ [6,7] in crystals, glasses or glass-ceramics have been extensively studied to develop up-conversion visible or ultraviolet lasers which can be operated at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Selectively strong green up-conversion luminescence in co-doped -based fluoride glasses under 800 nm excitation

Qiu

Shojiya

Kanno

et al. 1998

J. Phys.: Condens. Matter

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Blue, green and red up-conversion luminescences at around 490, 545 and 650 nm, which result from the , and transitions, respectively, were observed in co-doped -based fluoride glasses under 800 nm excitation. Among these up-conversion luminescences, the green emission was extremely strong and the blue and red emission intensities were very weak. Selectively strong green up-conversion luminescences of these glasses indicate a high possibility for realizing a green up-conversion laser. Up-conversion processes for the blue, green and red emissions are two-photon processes assisted by energy transfer. It is proposed that the up-conversion mechanism for the blue and green emissions is different from that for the red emission. The respective mechanisms are discussed.

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“…For fiber amplifiers, Er 3+ doped glass is applied as the material because of its fluorescence at 1.5 mm. Furthermore, Pr 3+ and Tm 3+ doped glasses are applied for fiber amplifiers because they can amplify light in new optical communications area around 1.3 or 1.4 mm [3][4][5][6][7]. Other rare earth ions, Yb and Nd, reach a state of population inversion so easily that they are applicable for laser oscillators [8][9][10].…”

Section: Introductionmentioning

confidence: 99%