On the ultimate lower limit of attenuation in glass optical waveguides

Keck, Donald B.; Maurer, R. D.; Schultz, Peter C.

doi:10.1063/1.1654649

Cited by 229 publications

(41 citation statements)

References 6 publications

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“…Note that because of the cancellation of the attenuations in the long lead-in and lead-out fibers, the induced attenuation spectra of Fig. 3 exhibit only faint replications of the prominent first and second OH overtone bands near 950 and 725 nm, 10 which are strongly apparent in the transmission spectra of The induced absorption spectra of Fig. 3 are qualitatively reminiscent of spectra previously recorded for fibers and bulk silica samples exposed to equivalent doses of y rays.…”

Section: Resultssupporting

confidence: 54%

Fast-neutron radiation effects in a silica-core optical fiber studied by a CCD-camera spectrometer

et al. 1994

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A simple CCD-camera spectrometer was deployed at the Los Alamos Spallation Radiation Effects Facility to characterize fast-neutron irradiation effects in several silica-based optical fibers over the wavelength range 450-1100 nm. The experimental arrangement allowed optical loss spectra to be developed from remotely recovered frame grabs at various times during irradiation without it being necessary to resort to cutback methods. Data recorded for a pure-silica-core/F-doped-silica-clad fiber displayed a peculiar artifact, which is described and mathematically modeled in terms of leaky modes propagating in an optical cladding that is substantially less susceptible to radiation-induced optical attenuation than is the core. Evidence from optical time-domain reflectometry supports the postulate that mode leakage into the cladding may be a result of light scattering from the tracks of ions displaced by the 14-MeV neutrons. These results suggest that fibers with fluorine doping in the core, as well as in the cladding, would be relatively resistant to radiation-induced attenuation in the UV-visible spectral region.

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Section: Resultssupporting

confidence: 54%

Fast-neutron radiation effects in a silica-core optical fiber studied by a CCD-camera spectrometer

et al. 1994

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“…That is, in As 2 S 3 , the two spectra are exponential with the characteristic energies of $200 meV. In SiO 2 , the one-photon spectrum [27][28][29][30][31][32] is liable to be affected by defects and light scattering, while the spectrum at $5 eV appears to be nearly parallel to that of the twophoton absorption [10,14]. Taking equations (3) and (5) into account, we can assume that these parallel spectra are indications of resonant two-photon absorption processes.…”

Section: As 2 S 3 and Siomentioning

confidence: 99%

“…As references, a[27][28][29][30][31][32] and b[10,14] for SiO 2 are also shown, in which a at hx 6 8 eV may be affected by light scattering.…”

mentioning

confidence: 99%

Two-photon optical absorption in amorphous materials

Tanaka

2004

Journal of Non-Crystalline Solids

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“…The most widely used conventional optical fibers transmit light through a solid core of doped silica (SiO 2 ) glass using the mechanism of index confinement, or total internal reflection (figure 3-la) [29], [30], [31]. In the last decade, microstructured fibers incorporating air enclaves have been created with these methods, resulting in photonic band gap fibers ( figure 3-1b).…”

Section: Introductionmentioning

confidence: 99%

In-Fiber Semiconductor Filament Arrays

et al. 2008

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One-dimensional nanostructures with high aspect-ratios and nanometer cross-sectional dimensions have been the focus of recent studies in the persistent drive to miniaturize devices. Conventional bottom-up methods such as vapor-liquid-solid growth have been widely applied for the fabrication of uniform and high quality nanowires. Two challenges toward nanoelectronics and other applications remain: on the singlenanowire level, precisely manipulating an individual nanowire for the sophisticated functionalities, and on the multiple-nanowire level, integrating nanowires into designed architecture at large scale. Thus, an alternative approach with the capacity to achieve ordered and extended nanowires is highly desirable.In this thesis, we observe an intriguing phenomenon that a cylindrical shell upon reaching a characteristic thickness breaks up into filament arrays during optical-fiber thermal drawing. This structural evolution occurs exclusively in the cross-sectional plane, while the uniformity along the axial direction remains intact. We demonstrate crystalline semiconductor nanowires by post-drawing annealing procedure and characterize their electrical and optoelectric properties for the devices such as optical switch. This top-down thermal drawing approach provides new opportunities for nanostructure fabrication with high throughput and at low cost, and offers promising applications in renewable energy and data storage.In order to understand the stability (or instability) of thin shells and filaments, we explore a physical mechanism during the complicated thermal drawing. A perspective of capillary instability from fluid mechanics is focused. Axial stability of continuous filaments is consistent with capillary instability. Axial stability of a thicker cylindrical shell arises from large radius and high viscosity. These results provide theoretical guidance in the understanding of attainable feature sizes and in materials selection to expand the potential functionalities of devices in microstructured fibers.

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On the ultimate lower limit of attenuation in glass optical waveguides

Cited by 229 publications

References 6 publications

Fast-neutron radiation effects in a silica-core optical fiber studied by a CCD-camera spectrometer

Fast-neutron radiation effects in a silica-core optical fiber studied by a CCD-camera spectrometer

Two-photon optical absorption in amorphous materials

In-Fiber Semiconductor Filament Arrays

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