Patent Number: 6,490,399

Title: Glass for optical waveguides or the like

Abstract: Optical waveguides made of quartz glass with reduced infrared absorptionand reduced attenuation coefficients are made of glass material composedof atoms having mass numbers higher than that of the natural isotopedistribution. The quartz glass or doped quartz glass is made of siliconatoms, of which most or all have the mass numbers 29 and/or 30, as well asof oxygen atoms, of which most or all are composed of isotopes with themass numbers 17 and/or 18. Atoms of the .sup.76 Ge isotope are preferablyused for doping with germanium atoms having higher mass numbers than inthe natural isotope mixture. Glass with atoms of preferably .sup.30 Siand/or .sup.18 O are preferably used for optical waveguides based onquartz glass having attenuation coefficients below 0.15 dB/km. Asindicated, such optical waveguides are also suitable for transmittinghigh-energy, pulsed or continuous laser light in a wavelength range from2.0 to 3.0 .mu.m. These optical waveguides are also suitable fortransmitting holmium laser light at 2.1 .mu.m and Er laser light with awavelength of 2.79 and 2.94 .mu.m.

Inventors: Heitmann; Walter (Gross-Bieberau, DE), Klein; Karl-Friedrich (Friedberg, DE)


International Classification: C03C 4/00 (20060101); C03C 3/06 (20060101); G02B 6/02 (20060101); G02B 006/00 ()

Expiration Date: 12/02015