Spectral losses of unclad vitreous silica and soda-lime-silicate fibers

Kaiser, Peter K.; Tynes, A. R.; Astle, H. W.; Pearson, Adam J.; French, W. G.; Jaeger, R. E.; Cherin, A. H.

doi:10.1364/josa.63.001141

Cited by 84 publications

(9 citation statements)

References 7 publications

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“…The peak of the OH-absorption band at 1.39 μηι, which is the first overtone of the strong OH-vibration band at 2.72 μηι [5], increases by about 3% when the temperature is raised from 0°C to 60° C. This supports our considerations in Section 6.2 concerning the shift of the infrared absorption edge. Fig.…”

Section: Changes In Oh-absorption Bandsupporting

confidence: 87%

Temperature Dependence of the Spectral Attenuation of a Silica-Based Fiber

Heitmann¹

1987

Journal of Optical Communications

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The spectral attenuation coefficient of a silica-based fiber is subjected to several temperature-dependent effects: with rising temperature, we observe an increase of Rayleigh-scattering loss, and beyond 1500 nm, of absorption loss as well. Both effects cause a spectral shift of the attenuation minimum and an increase of 0.005dB/km when the fiber temperature is raised from 0°C to 60° C. Also peak height, spectral position and shape of the OHabsorption band near 1.4μηι are changed. Calculations resulted in a minimum attenuation coefficient of 0.100 dB/km at room temperature for silica. At low temperatures, losses below that value seem to be achievable in silica-based fibers.An essential condition of our measurements was to avoid any variation of microbending losses. We tried to reduce the microbending effects by rewinding the fiber on a styropor expanded polystyrene spool 320mm in diameter, with a tension of only a few grams. However, we then still observed considerable effects due to microbending losses. Since the fiber was wrapped around the spool in numerous irregular layers these losses may have been caused by the pressure at the contact points of the fiber surface. Therefore, the fiber was rewound layer by layer, with a sheet of paper put between each layer to avoid any cross-over of single windings. This technique led to an additional loss of about 2 dB/km, possibly caused by irregularities in the microscopic structure of the paper.

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Section: Changes In Oh-absorption Bandsupporting

confidence: 87%

Temperature Dependence of the Spectral Attenuation of a Silica-Based Fiber

Heitmann¹

1987

Journal of Optical Communications

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“…Only the 0.945 m OH absorption bands lies in the wavelength range between 910 and 1100 nm. Our glass has a relatively low OH content, as indicated by a measured absorption coefficient of 1.4 cm 1 at a wavelength of 2.73 m. In fused silica, the measured ratio of the strength of the OH absorption at 0.985 m to that at 2.73 m is approximately 10 4 [35]. Thus, using this ratio, we estimate an OH-induced loss in our glass of less than 6 10 4 dB/cm between 910 and 1100 nm, which is negligible.…”

Section: Spectroscopymentioning

confidence: 80%

“…It is widely known that the harmonic stretching vibration of OH ions in silica fibers is one of the principal loss mechanisms [35]. The principal OH absorption band is centered at 2.73 m, and gives rise to additional absorption bands due to overtones and overtone combinations of the 2.73 m stretch vibration.…”

Section: Spectroscopymentioning

confidence: 99%

Ytterbium-doped glass waveguide laser fabricated by ion exchange

Florea

Winick

1999

J. Lightwave Technol.

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Abstract-A ytterbium-doped, glass, channel waveguide laser, fabricated by ion exchange, is reported. The 2.2-cm long device, using broad-band 4% output couplers, lased in the vicinity from 1020 to 1030 nm when pumped by a Ti : sapphire laser operating at 910 nm. A lasing threshold of 50 mW (launched pump) and a slope efficiency of 5% were measured. Device parameters, including fluorescence lifetimes, emission and absorption cross sections, propagation losses, and mode profiles were experimentally determined and laser performance was analytically modeled using this data.

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“…1 shows a typical optical loss spectrum of a fabricated fiber. The fiber absorption abruptly increased around 200 nm and a peak, which was assigned to higher order harmonics of OH stretching vibrations, appeared in the infrared region (1380 nm) [6].…”

Section: Methodsmentioning

confidence: 99%