Patent ID: 9014524
Filing Date: 2015-04-21
Classification: C03C,G02B

Abstract:
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.