Mechanisms of optical losses in Bi:SiO_2 glass fibers

Zlenko, Alexander S.; Mashinsky, Valery M.; Исхакова, Л. Д.; Semjonov, Sergey L.; Колташев, В. В.; Karatun, Nikita M.; Dianov, E. M.

doi:10.1364/oe.20.023186

Cited by 48 publications

(26 citation statements)

References 58 publications

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“…The two low-frequency bands at 72 and 96 cm −1 correspond well to E g and A 1g modes of the crystalline bismuth [20–24]. The appearance of these bands together with a decrease in intensity of the Bi-induced GaBi-like bands at 269 and 181 cm −1 shows that thermal annealing causes in withdrawing of bismuth from the GaAsBi lattice sites and its agglomeration to Bi nanocrystals.…”

Section: Resultsmentioning

confidence: 91%

Bismuth Quantum Dots in Annealed GaAsBi/AlAs Quantum Wells

et al. 2017

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Formation of bismuth nanocrystals in GaAsBi layers grown by molecular beam epitaxy at 330 °C substrate temperature and post-growth annealed at 750 °C is reported. Superlattices containing alternating 10 nm-thick GaAsBi and AlAs layers were grown on semi-insulating GaAs substrate. AlAs layers have served as diffusion barriers for Bi atoms, and the size of the nanoclusters which nucleated after sample annealing was correlating with the thickness of the bismide layers. Energy-dispersive spectroscopy and Raman scattering measurements have evidenced that the nanoparticles predominantly constituted from Bi atoms. Strong photoluminescence signal with photon wavelengths ranging from 1.3 to 1.7 μm was observed after annealing; its amplitude was scaling-up with the increased number of the GaAsBi layers. The observed photoluminescence band can be due to emission from Bi nanocrystals. The carried out theoretical estimates support the assumption. They show that due to the quantum size effect, the Bi nanoparticles experience a transition to the direct-bandgap semiconducting state.

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Section: Resultsmentioning

confidence: 91%

Bismuth Quantum Dots in Annealed GaAsBi/AlAs Quantum Wells

et al. 2017

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“…However, the MeNPs co-doping also can lead to a decreased radiative emission rate; i.e., suppressing the REE luminescence [206]. The other possible reasons for this are the extensive scattering and the additional losses caused by the high MeNPs concentration [206,207].…”

Section: Menp-containing Fibersmentioning

confidence: 99%

Nano-Structured Optical Fibers Made of Glass-Ceramics, and Phase Separated and Metallic Particle-Containing Glasses

Veber

Vermillac

et al. 2019

Fibers

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For years, scientists have been looking for different techniques to make glasses perfect: fully amorphous and ideally homogeneous. Meanwhile, recent advances in the development of particle-containing glasses (PCG), defined in this paper as glass-ceramics, glasses doped with metallic nanoparticles, and phase-separated glasses show that these "imperfect" glasses can result in better optical materials if particles of desired chemistry, size, and shape are present in the glass. It has been shown that PCGs can be used for the fabrication of nanostructured fibers-a novel class of media for fiber optics. These unique optical fibers are able to outperform their traditional glass counterparts in terms of available emission spectral range, quantum efficiency, non-linear properties, fabricated sensors sensitivity, and other parameters. Being rather special, nanostructured fibers require new, unconventional solutions on the materials used, fabrication, and characterization techniques, limiting the use of these novel materials. This work overviews practical aspects and progress in the fabrication and characterization methods of the particle-containing glasses with particular attention to nanostructured fibers made of these materials. A review of the recent achievements shows that current technologies allow producing high-optical quality PCG-fibers of different types, and the unique optical properties of these nanostructured fibers make them prospective for applications in lasers, optical communications, medicine, lighting, and other areas of science and industry.Made of glass, optical fibers inherited all positive and negative properties of this material. Glasses are easy and inexpensive to produce on any scale and in any shape, they can possess high chemical stability and mechanical strength, and have high transparency. However, they could hardly compete, for example, with crystalline materials in thermal conductivity, or rare-earth elements' absorption, emission cross-sections, and available transparency range. Recent advances in glass science showed that properties of this material can be significantly improved if some additional phases are formed or impregnated in the glass. In particular, advances have been achieved in the development of particle-containing glasses: glass-ceramic materials, glasses doped with metallic nanoparticles, and phase-separated glasses. To date, these particle-containing glasses have become quite common and actively used in case of the bulk materials, but are still rather new for fiber optics.The purpose of this review is to summarize recent advances in the fabrication of structured fibers made of particle-containing glasses, their potential benefits, their actual properties, and their potential applications. The review covers three types of particle-containing glasses (PCG): crystalline dielectric particles, i.e., glass-ceramics; metallic nanoparticles (MeNPs); and dielectric amorphous particles, i.e., phase-separated glasses.First, we consider properties of the PCG bulk materials, their potenti...

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“…The investigated nanophases include oxides, fluorides, and metals . Importantly, the resulting materials are found to be suitable to be engineered for a wide range of applications, comprising optical 3D memories, UV‐to‐visible solar‐blind converters, special optical fibers, and UV‐emitting glassy‐films …”

Section: Introductionmentioning

confidence: 99%

“…[3] In this field, some investigations have given relevant results in recenty ears, demonstrating the feasibility of glass-based easy-to-process nanocrystalline materials with different kinds of grown-in-glass NCs in at ransparent matrix-eitherf rom meltingo rb ys olution-based methods.T he investigated nanophases include oxides, [4][5][6][7] fluorides, [8][9][10] and metals. [11][12][13] Impor-tantly,t he resulting materialsa re found to be suitable to be engineered for awide range of applications,comprising optical 3D memories, [13] UV-to-visible solar-blindc onverters, [14] special opticalfibers, [15,16] and UV-emitting glassy-films. [7] In glass-based nanocrystalline systems, as pecial role is playedb yw ide-band-gap nano-oxides, as they can deliver intrinsic and extrinsic functions into an optical silicate glass without compromising light transmittanceinthe visible range (provided that the NC size is kept at af ew nm).…”

Section: Introductionmentioning

confidence: 99%

Donor–Acceptor Control in Grown‐in‐Glass Gallium Oxide Nanocrystals by Crystallization‐driven Heterovalent Doping

et al. 2017

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Incorporation of doping ions in nanocrystals is a strategy for providing nanophases with functions directly related to ion features. At the nanoscale, however, doping can also activate more complex effects mediated by perturbation of the nanophase size and structure. Here, we report a paradigmatic case in which we modify grown-in-glass γ-Ga O nanophases by nickel or titanium doping of the starting glass, so as to control the concentration of oxygen and gallium vacancies responsible for the light emission. Optical absorption and luminescence show that Ni and Ti ions enter into the nanophase, but differential scanning calorimetry and X-ray diffraction indicate that Ni and Ti also work as modifiers of nanocrystal growth. As a result, doping influences nanocrystal size and concentration, which in turn dictate the number of donors and acceptors per nanocrystal. Finally, the chain of effects turns out to control both the intensity and spectral distribution of the light emission.

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Mechanisms of optical losses in Bi:SiO_2 glass fibers

Cited by 48 publications

References 58 publications

Bismuth Quantum Dots in Annealed GaAsBi/AlAs Quantum Wells

Bismuth Quantum Dots in Annealed GaAsBi/AlAs Quantum Wells

Nano-Structured Optical Fibers Made of Glass-Ceramics, and Phase Separated and Metallic Particle-Containing Glasses

Donor–Acceptor Control in Grown‐in‐Glass Gallium Oxide Nanocrystals by Crystallization‐driven Heterovalent Doping

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