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Refractive index of densified silica glass

1993; Elsevier BV; Volume: 159; Issue: 3 Linguagem: Inglês

10.1016/0022-3093(93)90229-q

1873-4812

Naoyuki Kitamura, Yutaka Toguchi, Shigeki Funo, Hiroshi Yamashita, Makoto Kinoshita,

Building materials and conservation

Silica glass with OH content around 1200 ppm was densified by hot isostatic pressing (HIP) to about 1%. The wavelength dispersion of the refractive index of the densified glass was measured in the region 0.238–1.71 μm. The wavelength dispersion is well explained by the three-term harmonic oscillator model modified by the extended point dipole theory, which has two terms with resonance wavelengths in the UV region and one term in the IR region. The model suggests that the resonance wavelengths depend on the density. In the present experiment, it is deduced that the resonance wavelengths in the UV region shift to the longer-wavelength with increasing density.