Optical attenuation in pure and doped fused silica in the ir wavelength region
- 1 July 1977
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 31 (1), 33-35
- https://doi.org/10.1063/1.89468
Abstract
Infrared absorption spectra of GeO2‐, P2O5‐, and B2O3‐doped fused silica and nondoped fused silica have been obtained in the 3–25‐μm wavelength region. It is shown that the intrinsic infrared absorption loss of doped silica fiber increases by several orders of magnitude beyond 1.8–2.0 μm because of the overtone and combination tone vibrations of the SiO4 tetrahedron. The loss spectrum is affected by dopants, especially in the case of B2O3. The lower limit of attenuation in optical fiber is estimated to be about 0.2 dB/km at 1.6 μm.Keywords
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