Quartz glass preform for optical waveguide
AssigneeHeraeus Quarzglas GmbH & Co. KG
InventorHeinz Fabian
Life of this patent
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Abstract
In an optical component having a cylindrical core of quartz glass and a coaxial jacket of quartz glass containing a dopant which decreases the index of refraction, the jacket glass contains a viscosity-increasing stiffening agent to reduce tensile strength on the core at drawing temperature of 1000.degree. to 2500.degree. C. or a relaxation agent for lowering the viscosity of the quartz glass in a concentration which is lower than that present in the core glass.
Claims17
Optical component for the transmission of light, said component comprising:
- a cylindrical core consisting of one of quartz glass and a combination consisting of quartz glass and a relaxation agent,
- a jacket coaxially surrounding said cylindrical core, said jacket comprising quartz glass and a dopant which lowers the index of refraction of the jacket relative to the index of refraction of the core, and
- the core having a lower viscosity than the viscosity of the jacket at a drawing temperature in the range of 1000.degree.-2500.degree. C., said difference in viscosity being due to the presence of at least one of said relaxation agent in said core and a stiffening agent in said jacket.
Optical component for the transmission of light, said component comprising
- a cylindrical core consisting of pure quartz glass, and
- a jacket coaxially surrounding said cylindrical core, said jacket comprising a dopant which lowers the index of refraction of the jacket relative to the index of refraction of the core, and a stiffening agent which increases the viscosity of the jacket relative to the viscosity of the core at a drawing temperature of 1000.degree.-2500.degree. C.
Optical component for the transmission of light, said component comprising
- a cylindrical core consisting of quartz glass and a relaxation agent, and
- a jacket coaxially surrounding said cylindrical core, said jacket comprising a dopant which lowers the index of refraction of the jacket relative to the index of refraction of the core.
Dependencies are inferred from the claim text.