Tm3+ doped Bi2O3–GeO2–Na2O glasses for 1.8μm fluorescence

Fan, Huiyan; Gao, Guojun; Wang, Guonian; Hu, Jian; Hu, Lili

doi:10.1016/j.optmat.2009.12.012

Cited by 63 publications

(27 citation statements)

References 30 publications

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“…The small absorption band around 3 250 cm −1 is assigned to the stretching vibration of free OH − groups. Its absorption coefficient α OH is 0.46 cm −1 , which is lower than those of other reports [11,16] . The good infrared transmission of this bismuth germanate glass will benefit its spectroscopic properties in MIR range.…”

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confidence: 66%

“…A previous study has shown that bismuth glass has significantly lower phonon energy (MPE of ∼440 nm −1 ) than germanate and tellurite glasses. This property is helpful in reducing the multiphonon relaxation rate for Er 3+ : 4 I 11/2 → 4 I 13/2 transition [11] . The large refractive index (∼2.1) is favorable for obtaining large absorption and emission cross sections.…”

Section: An Ermentioning

confidence: 99%

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Ef f icient 2.7-\mu m emission in Er3+-doped bismuth germanate glass pumped by 980-nm laser diode

et al. 2012

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An Er3+ -doped lead-free bismuth germanate glass is synthesized. Its 2.7-µm emission property is analyzed, and the efficient 2.7-µm emission from the glass is observed under 980-nm laser diode excitation. The prepared glass possesses high spontaneous transition probability (64.8 s −1 ) and a large calculated emission cross section (6.61×10 −21 cm 2 ) corresponding to the 4 I 11/2 → 4 I 13/2 transition. The multiphonon relaxation rate for the excited state 4 I 11/2 is only 236 s −1 . Therefore, the excellent spectroscopic properties and outstanding thermal stability suggest that this glass is a suitable host for developing solid-state lasers operating in the mid-infrared.OCIS codes: 160.2750, 160.4760, 160.5690. doi: 10.3788/COL201210.091601.Over the past several decades, compact solid-state lasers operating in the wavelength region around 2.7 µm have been actively developed because of their applicability in various fields, such as remote sensing, atmosphere pollution monitoring, eye-safe laser radar, and medical surgery [1−4] . Much effort has been directed to the search for new laser materials in the mid-infrared (MIR) range. Host glass and active ion are two important factors in achieving efficient and high-quality optical devices based on rare-earth ions. Er 3+ -doped non-oxide glass (such as fluoride and chalcogenide glasses), which is a compact and efficient source of 2.7-µm radiation, has been researched extensively [5−9] . However, fluoride and chalcogenide glasses have fussy preparation processes and poor thermal stability, chemical durability, and physical and mechanical performance. These disadvantages restrain their wider application in 2.7-µm fibers [10] . Therefore, MIR laser materials from oxide glass are necessary.To improve the emission feature of the Er 3+ : 4 I 11/2 excited state, the oxide glass host should have low phonon energy. Among various oxide glasses, bismuth glass shows many significant advantages over other oxide glasses in terms of the fluorescent properties of rare earth. A previous study has shown that bismuth glass has significantly lower phonon energy (MPE of ∼440 nm −1 ) than germanate and tellurite glasses. This property is helpful in reducing the multiphonon relaxation rate for Er 3+ : 4 I 11/2 → 4 I 13/2 transition [11] . The large refractive index (∼2.1) is favorable for obtaining large absorption and emission cross sections. Moreover, bismuth glass exhibits better thermal stability and chemical durability than fluoride and chalcogenide glasses. These characteristics make bismuth glass a suitable host for MIR solidstate lasers. This work aims to investigate the spectroscopic performance of 2.7-µm emission in Er 3+ -doped bismuth glass, as well as the radiative properties and emission cross section.The investigated host bismuth glass had the following composition in cation%: 55BiO 1.5 -30 GeO 2 -15NaO 0.5 (BGNE). The single doping concentration of Er 3+ in the form of ErF 3 was 2 mol%. Using ErF 3 will induce a positive effect on MIR emission properties of rare earth (RE) ...

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confidence: 66%

Section: An Ermentioning

confidence: 99%

Ef f icient 2.7-\mu m emission in Er3+-doped bismuth germanate glass pumped by 980-nm laser diode

et al. 2012

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“…Our previous work indicated that bismuthate glass (Bi 2 O 3 -GeO 2 -Na 2 O) has a phonon energy of ∼440 cm −1 , which is significantly lower than both silicates and tellurites [12], and comparable to chalcogenides [16]. This extends the infrared transparency range to ∼6 m [12,13] and results in lower non-radiative rates, which is helpful to reduce the multiphonon relaxation from 3 H 4 level to 3 H 5 level. Bismuthate glass also exhibits high rare earth ions solubility, enabling highly doped and hence very compact fiber lasers to be produced [17].…”

Section: Introductionmentioning

confidence: 99%

“…Bismuthate glasses have important advantages for optical (including structure) and electrical properties over other common oxide glasses [11][12][13][14][15]. Our previous work indicated that bismuthate glass (Bi 2 O 3 -GeO 2 -Na 2 O) has a phonon energy of ∼440 cm −1 , which is significantly lower than both silicates and tellurites [12], and comparable to chalcogenides [16].…”

Section: Introductionmentioning

confidence: 99%

“…Bismuthate glass also exhibits high rare earth ions solubility, enabling highly doped and hence very compact fiber lasers to be produced [17]. The large refractive index (∼2.1) of bismuthate glass enhances both the absorption and emission cross sections [12]. On the other hand, it is well known that Bi 2 O 3 is a conditional glass network former [11,[18][19][20], the presence of two glass formers Bi 2 O 3 and GeO 2 produce a more complex network structure with a great variety of sites for the RE ions which contribute to the inhomogeneous broadening of the emission band.…”

Section: Introductionmentioning

confidence: 99%

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