Luminescence properties of IR-emitting bismuth centres in SiO<sub>2</sub>-based glasses in the UV to near-IR spectral region

Firstova, Elena; Bufetov, I. A.; Khopin, V. F.; Velmiskin, Vladimir V.; Firstov, S. V.; Bufetova, G. A.; Нищев, К. Н.; Gur'yanov, A N; Dianov, Evgenii M

doi:10.1070/qe2015v045n01abeh015624

Cited by 50 publications

(20 citation statements)

References 29 publications

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“…With an increase of pump power, one can observe the following changes: (i) spectral position of gain peak slightly shifts to the long-wavelength region regardless of the configuration of the BDFA; (ii) the noticeable broadening of the gain spectra; (iii) the noise figure values dropped to 5-6 dB. The observed shift of the maximum as well as the broadening of the gain spectra can be explained by a growth of the gain in the long-wavelength region attributed to another type of the BACs, namely, bismuth-related active centers associated with silicon, which are also formed in the fiber glass core 5 . In contrast to the gain spectra, the noise figure spectra significantly depend on the BDFA configurations.…”

Section: Resultsmentioning

confidence: 92%

“…Using a unidirectional forward pumping configuration ( 1230 nm and 460 mW), a peak gain of 24.5 dB at 1320 nm with 3-dB bandwidth 37 nm and a minimum noise figure of 5 dB were achieved. By the virtue of further in-depth studies of the BACs responsible for the amplification at the wavelengths near 1300 nm, including inhomogeneous broadening effects 4 , 5 , along with the optimization of the production process 6 and the chemical composition of the glass matrix 7 it was possible to provide the improvement of the spectral characteristics of such fiber amplifiers. Also, the BDFA with an extended gain bandwidth (over a 40 nm) in the wavelength region between 1320 and 1360 nm has been constructed using a dual-wavelength pumping configuration 8 .…”

Section: Introductionmentioning

confidence: 99%

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Compact and efficient O-band bismuth-doped phosphosilicate fiber amplifier for fiber-optic communications

Firstov

Khegai

Kharakhordin

et al. 2020

Sci Rep

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During last decades there has been considerable interest in developing a fiber amplifier for the 1.3-$$\upmu $$μm spectral region that is comparable in performance to the Er-doped fiber amplifier operating near 1.55 $$\upmu $$μm. It is due to the fact that most of the existing fiber-optic communication systems that dominate terrestrial networks could be used for the data transmission in O-band (1260–1360 nm), where dispersion compensation is not required, providing a low-cost increase of the capacity. In this regard, significant efforts of the research laboratories were initially directed towards the study of the praseodymium-doped fluoride fiber amplifier having high gain and output powers at the desired wavelengths. However, despite the fact that this type of amplifiers had rapidly appeared as a commercial amplifier prototype it did not receive widespread demand in the telecom industry because of its low efficiency. It stimulated the search of novel optical materials for this purpose. About 10 years ago, a new type of bismuth-doped active fibers was developed, which turned out to be a promising medium for amplification at 1.3 $$\upmu $$μm. Here, we report on the development of a compact and efficient 20-dB (achieved for signal powers between $$-40$$-40 and $$-10$$-10 dBm) bismuth-doped fiber amplifier for a wavelength region of 1300–1350 nm in the forward, backward and bi-directional configurations, which can be pumped by a commercially available laser diode at 1230 nm with an output power of 250 mW. The compactness of the tested amplifier was provided by using a depressed cladding active fiber with low bending loss, which was coiled on a reel with a radius of 1.5 cm. We studied the gain and noise figure characteristics at different pump and signal powers. A record gain coefficient of 0.18 dB/mW (at the pump-to-signal power conversion efficiency of above 27$$\%$$%) has been achieved.

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Section: Resultsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Compact and efficient O-band bismuth-doped phosphosilicate fiber amplifier for fiber-optic communications

Firstov

Khegai

Kharakhordin

et al. 2020

Sci Rep

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“…In all preforms and fibers, the cladding consisted of silica, and the core of bismuth-activated silica co-doped with alumina, germania, or phosphorus oxide. By selecting the composition and concentration of additional (other than Bi) dopants, it was possible to change the luminescence spectral range (Firstov et al, 2011; Firstova et al, 2015) and to create the refractive index difference necessary to guide light. In case the additional dopants were not introduced, holes were drilled around the core to form a light-guiding structure.…”

Section: Methodsmentioning

confidence: 99%

“…It is also known that the optical loss of Bi-doped fibers strongly depends on the concentration of bismuth and other dopants as well as on the technological conditions (Dvoyrin et al, 2010; Firstov et al, 2011; Zlenko et al, 2013; Firstova et al, 2015). Thus, accurate control of the composition, concentration, and radial distribution of elements in the fiber and preform core are required.…”

Section: Introductionmentioning

confidence: 99%

Identification of Nanocrystalline Inclusions in Bismuth-Doped Silica Fibers and Preforms

et al. 2016

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The nature of nanocrystalline inclusions and dopant distribution in bismuth-doped silicate fibers and preforms are studied by scanning and transmission electron microscopy, and energy and wavelength-dispersive X-ray microanalysis. The core compositions are Bi:SiO2, Bi:Al2O3-SiO2, Bi:GeO2-SiO2, Bi:Al2O3-GeO2-SiO2, and Bi:P2O5-Al2O3-GeO2-SiO2. Nanocrystals of metallic Bi, Bi2O3, SiO2, GeO2, and Bi4(GeO4)3 are observed in these glasses. These inclusions can be the reason for the background optical loss in bismuth-doped optical fibers. The bismuth concentration of 0.0048±0.0006 at% is directly measured in aluminosilicate optical fibers with effective laser generation (slope efficiency of 27% at room temperature).

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“…We noticed in both glass and glass-ceramics samples bismuth NIR emission centers can be stabilized. They show typical absorptions and extremely broad luminescence which spans from 1100 to 1600 nm [3][4][5][6][34][35][36] with full width at half maximum of~300 nm (see Figures 2 and 5). exhibit similar luminescence feature.…”

Section: Sr 2 Ybf 7 Nanocrystals Morphology and Bismuth Distributiomentioning

confidence: 99%

Crystallization kinetics and enhanced Bi NIR luminescence of transparent silicate glass‐ceramics containing Sr₂YbF₇ nanocrystals

Peng

et al. 2016

J Am Ceram Soc.

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Bismuth‐doped glasses and crystals have been widely investigated due to their intriguing potential applications in superbroadband fiber amplifier and lasers in new NIR spectral range. However, few reports have been devoted so far to bismuth‐doped transparent glass‐ceramics. Here, this work reports on bismuth‐doped silicate glasses and glass‐ceramics, which were prepared by melt‐quenching and consequent annealing processes, respectively. On the basis of the analyses on crystallization kinetics, nucleation and growth rate of crystalline phase can be modulated and Sr2YbF7 nanophase can, therefore, be precipitated uniformly inside the glass matrix in a controlled way to maintain proper transparence especially in optical telecommunication windows. Once the nanophase comes into being, enhanced bismuth NIR luminescence can be observed by more than 40 times upon excitation of 470 nm. Similar enhancement can appear upon different excitation schemes and the mechanism is discussed accordingly. Such Bi doped transparent glass‐ceramics with improved luminescence efficiency might find application in fiber lasers for future optical fiber communication.

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Luminescence properties of IR-emitting bismuth centres in SiO₂-based glasses in the UV to near-IR spectral region

Cited by 50 publications

References 29 publications

Compact and efficient O-band bismuth-doped phosphosilicate fiber amplifier for fiber-optic communications

Compact and efficient O-band bismuth-doped phosphosilicate fiber amplifier for fiber-optic communications

Identification of Nanocrystalline Inclusions in Bismuth-Doped Silica Fibers and Preforms

Crystallization kinetics and enhanced Bi NIR luminescence of transparent silicate glass‐ceramics containing Sr₂YbF₇ nanocrystals

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Luminescence properties of IR-emitting bismuth centres in SiO2-based glasses in the UV to near-IR spectral region

Cited by 50 publications

References 29 publications

Compact and efficient O-band bismuth-doped phosphosilicate fiber amplifier for fiber-optic communications

Compact and efficient O-band bismuth-doped phosphosilicate fiber amplifier for fiber-optic communications

Identification of Nanocrystalline Inclusions in Bismuth-Doped Silica Fibers and Preforms

Crystallization kinetics and enhanced Bi NIR luminescence of transparent silicate glass‐ceramics containing Sr2YbF7 nanocrystals

Contact Info

Product

Resources

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Luminescence properties of IR-emitting bismuth centres in SiO₂-based glasses in the UV to near-IR spectral region

Crystallization kinetics and enhanced Bi NIR luminescence of transparent silicate glass‐ceramics containing Sr₂YbF₇ nanocrystals