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April 1, 1973Applied Physics Letters255 citations

On the ultimate lower limit of attenuation in glass optical waveguides

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DKDonald B. KeckRMR. D. MaurerPSPeter C. Schultz

Key Points

  • To analyze the spectral absorption characteristics and identify the fundamental lower limits of attenuation in ultra-low-loss glass optical waveguides.
  • Fabricated low-loss glass optical waveguides exhibiting total attenuation down to 4 dB/km.
  • Measured and interpreted the optical absorption spectrum across the 700 nm to 1100 nm wavelength range.
  • Intrinsic ultraviolet absorption exhibits no measurable effect on attenuation at wavelengths beyond approximately 700 nm.
  • Between 700 and 1100 nm, total absorption is accounted for by hydroxyl (OH) content within ±0.7 dB/km, with water reduction projected to leave scattering as the primary loss mechanism and lower attenuation to ~2 dB/km.

Abstract

The fabrication of an extremely-low-loss glass optical waveguide, having as little as 4 dB/km total attenuation, has allowed interpretation of the absorption spectrum to a much greater degree than previously possible. It is shown that, beyond about 700 nm, intrinsic ultraviolet absorption will have no effect. Between 700 and 1100 nm, all absorption can be accounted for on the basis of OH to within ±0.7 dB/km. Marked reduction of the water content will leave the scattering as the major loss mechanism, thereby permitting total attenuations of about 2 dB/km.

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Cite This Study

Keck et al. (1973) studied this question.

synapsesocial.com/papers/6a6f75aff44fa9f079dce8b3https://doi.org/10.1063/1.1654649
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