초록 ▼

Glass fibre suitable for use as the core in fibre lasers and/or amplifiers has a core which consists of a continuous glass phase and a dispersed phase of crystallites. The preferred crystallites are the oxides and phosphates of rare earth metals, e.g. Nd2O3 and NdP5O14. The small size concentration

Glass fibre suitable for use as the core in fibre lasers and/or amplifiers has a core which consists of a continuous glass phase and a dispersed phase of crystallites. The preferred crystallites are the oxides and phosphates of rare earth metals, e.g. Nd2O3 and NdP5O14. The small size concentration and distribution of the crystallites keeps the attenuation down to acceptable levels.

대표청구항 ▼

An optical waveguide suitable for use as an optical laser or amplifier, said waveguide comprising: a core having a continuous glass composition first phase made from a mixture of at least two different glass forming materials to provide said continuous glass composition phase having a first refracti

An optical waveguide suitable for use as an optical laser or amplifier, said waveguide comprising: a core having a continuous glass composition first phase made from a mixture of at least two different glass forming materials to provide said continuous glass composition phase having a first refractive index; said core also having crystallites of rare earth metal oxides or phosphates with fluorescing properties in a second crystalline phase dispersed within said first phase; and a cladding layer of glass composition disposed about said core and having a second refractive index lower than said first refractive index.