Improving performance in ytterbium-erbium doped waveguide amplifiers through scattering by large silicon nanostructures

Wetter, Niklaus Ursus; Silva, Diego Silvério da; Kassab, L.R.P.; Jiménez‐Villar, Ernesto

doi:10.1016/j.jallcom.2019.04.141

Cited by 10 publications

(5 citation statements)

References 28 publications

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“…One possibility to realize the required dissipative waveguide is by intentionally doping with an absorbing ion for the desired wavelength range. In the case of the Er 3+ that was already illustrated above, doped waveguides can be realized for instance in LiNbO 3 [30,31], glasses [32,33] or polymers [34,35]. In all these cases achievable doping levels lead to absorption constants in the order of few cm −1 so that the required device length will be of the order of the centimeter.…”

Section: Discussionmentioning

confidence: 96%

“…The same order of magnitude can be expected for the doping with other rare earths ions such as Ho 3+ , Tm 3+ or Nd 3+ , or for the doping with metal impurities such as Fe, Cu, Ni or others. A certain increase of the dissipation losses and thus shorter devices may be expected by involving scattering processes in addition to absorption, for instance by the incorporation of nanometer size particles or crystals [33,36] into the waveguides. Moreover, as an alternative one may also rely exclusively on scattering losses by controlling waveguide imperfections.…”

Section: Discussionmentioning

confidence: 99%

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Ultrabroadband beam splitting in a dissipative system of three waveguides

Alrifai,

Coda,

Peltier

et al. 2020

Preprint

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We show that a system of three parallel waveguides, among which the central one is dissipative, leads to an ultra-broadband power splitting associated to an overall 50% power loss. The present approach is reminiscent of non-hermitian systems in quantum mechanics and does not require a perfect effective index matching between the external and the central waveguides. The present concept does not need any slow adiabatic evolution of the waveguide parameters and may therefore be realized over very short device lengths, specially in the case where the central waveguide is of the plasmonic type.

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Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

Ultrabroadband beam splitting in a dissipative system of three waveguides

Alrifai,

Coda,

Peltier

et al. 2020

Preprint

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“…However, due to the actual worldwide regulation of lead, bismuth-germanate glasses have been proposed as an alternative glass matrix to be deployed in optical amplifiers for their appropriate properties. Thanks to their high refractive index (~ 2), low phonon energy (~ 700 cm −1 ), high REI solubility, high mid-infrared (MIR) transmission up to 5 µm, high thermal stability, good mechanical strength and good chemical durability, bismuth-germanate glasses are great candidates for optical devices and photonic applications 14 – 18 . Generally, in a glass doped with REIs, a high refractive index increases the spontaneous emission probability, while in the meantime, a low phonon energy enhances the radiative relaxation rate from an excited energy state to a lower energy state.…”

Section: Introductionmentioning

confidence: 99%

The role of tungsten oxide in Er3+-doped bismuth-germanate glasses for optical amplification in L-band

Çamiçi

Guerineau

Rivera

et al. 2023

Sci Rep

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A series of novel Er3+-doped bismuth-germanate glasses containing different tungsten concentrations with a molar composition of 97.5[(75 − x)GeO2–25Bi2O3–(x)WO3]–2Sb2O3–0.5Er2O3 (x = 5, 10, 15, 20, and 25 mol%) were fabricated. Their thermal properties are measured by differential scanning calorimetry. A structural investigation by Raman spectroscopy suggested that changes occurred in the glass network by WO3 incorporation. By laser excitation at 980 nm, a strong emission from Er3+ ions at 1532 nm is observed, while the WO3 addition caused changes in the emission spectra. The emission cross-section spectra of Er3+ are calculated by both McCumber and Füchtbauer–Ladenburg theories and their comparison showed these theories yielded slightly different results, but in both cases, the calculations showed that a gain signal in L-band can be achieved when 30% of the Er3+ ions are at the excited state. This study proves that the Er3+-doped bismuth-germanate glasses are suitable for optical fiber amplifier applications operating at C- and L-band.

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“…Inicialmente foram produzidos no laboratório guias do tipo rib; entretanto devido à dificuldade do processo de fabricação, não foi dada continuidade [5]. Eles foram substituídos pelos guias do tipo pedestal, que se demonstraram promissores e produziram resultados satisfatórios [4][5][6][7][8][9][11][12][13][14][15]. Desde então, tem ocorrido o aprimoramento desta técnica, a fim de aperfeiçoar os processos para que conduzam a resultados cada vez melhores, conforme serão apresentados a seguir.…”

Section: Resultados E Discussõesunclassified

“…A fim de minimizar este tipo de perda em guias de onda, deve-se aplicar um alto contraste de índice de refração devido ao alto confinamento óptico da luz na região do núcleo [5] Nota-se pela Figura 15 que, as dimensões são semelhantes, porém, o que as diferem são as etapas de suas construções. Com foco em obter a melhor transmissão da luz e reduzir o custo do processo de fabricação, esta pesquisa bibliográfica demonstra, pelo processo de evolução que já passou [2][3][4][5][6][7][8][9][10][11][12][13][14][15], um resultado promissor sobre os guias de onda do tipo pedestal.…”

Section: Atenuaçãounclassified

Utilização da arquitetura pedestal para fabricação de guias de onda com ilhas de ouro visando desenvolvimento de dispositivos fotônicos que operem na região do infravermelho.

Delboni¹

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This work aims to produce passive waveguides using a pedestal structure with TeO2 -ZnO (TZ) and GeO2 -PbO (GP) matrices, in order to test the guidance of light in the visible and near infrared regions. A new process was used to manufacture the waveguides that replaces the chromium mask by the use of the silicon dioxide (SiO2). The profile of the guides was analyzed by Scanning Electron Microscopy and the Atomic Force Microscopy technique was used to characterize the gold islands. Films were produced using the Sputtering technique and propagation loss measurements were made using the top view technique using 632 nm and 980 nm laser. The guides with GP core did not demonstrate guidance in the visible and therefore the influence of O2 on the deposition of this film was studied, but it did not influence satisfatorily the process. Guides with TZ core demonstrated guidance in the visible (632 nm) and near infrared (980 nm) regions. For the cases of guides produced with gold islands, nucleation was carried out through several thermal treatments following procedures previously established by the group. The presence of gold islands significantly reduced the propagation loss in the near infrared region (980 nm) for all guides (1-10 µm and 80 µm wide) with GP core. For the case of guides with TZ core, this reduction was more significant for the narrower guides (1-10 µm in width). Finally, the lowest loss obtained in the visible region was 2 dB/cm for the 80 µm width guide with TZ core without gold islands and in the near infrared region it was 2.08 dB/cm for the 80 µm width guide with GP core with gold islands. It is important to highlight that guides with GP core without gold islands, showed at 980 nm, loss of 3.31dB/cm, for 80 µm width guide. Simulations were performed to theoretically determine guided modes and compare them with experimental results. This new production process with a pedestal platform brings advantages, as it promotes a low surface roughness, eliminating the concern about the micromasking effect resulting from the use of the chrome mask and simplifies the process steps, allowing the use of conventional microelectronic techniques already consolidated (lithography, oxidation and corrosion) based on silicon technology for the construction of the pedestal, proving to be applicable in the construction of photonic devices.

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Improving performance in ytterbium-erbium doped waveguide amplifiers through scattering by large silicon nanostructures

Cited by 10 publications

References 28 publications

Ultrabroadband beam splitting in a dissipative system of three waveguides

Ultrabroadband beam splitting in a dissipative system of three waveguides

The role of tungsten oxide in Er3+-doped bismuth-germanate glasses for optical amplification in L-band

Utilização da arquitetura pedestal para fabricação de guias de onda com ilhas de ouro visando desenvolvimento de dispositivos fotônicos que operem na região do infravermelho.

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