Isotopically altered optical fiber

摘要

An optical waveguide having a cladding layer formed of high-purity glass, or a cladding layer formed of high-purity isotope-proportion modified glass, and with a core of high-purity isotope-proportion-modified glass with the index of refraction of the core glass greater than the index of refraction of the cladding glass, said high-purity isotope-proportion-modified core material having a Si-29-isotope proportion at most 4.447% Si-29 (atom/atom) of all silicon atoms in said core, or at least 4.90% of Si-29 (atom/atom) atoms in said core, or having a Ge-73 isotope proportion of at most 7.2% Ge-73 (atom/atom) of all germanium atoms in said core, or at least 8.18% of Ge-73 (atom/atom) of Germanium atoms in said core region.

主权项

1. An optical waveguide comprising:
a) a cladding layer of first high-purity optical glass; said first high-purity optical glass comprising one of silica, germania and a mixture of silica and germania; said first high purity optical glass having a first index of refraction; b) a core region of second high-purity optical glass; said second high-purity optical glass comprising one of silica, germania and a mixture of silica and germania; said second high purity optical glass having a second index of refraction;the atom percentage of Si-29 to all other Si isotopes in said silica being one of:
more than 0 and less than 4.44; and more than 4.90 and less than or equal to 100;the atom percentage of Ge-73 to all other Ge isotopes in said germania being one of:
more than 0 and less than 7.41; and more than 8.18 and less than or equal to 100.