Device for applying electromagnetic microwave radiation in a plasma inside a hollow glass substrate tube, and method for manufacturing an optical preform

• Main Authors: VAN STRALEN MATTHEUS JACOBUS NICOLAAS, HARTSUIKER JOHANNES ANTOON, MILICEVIC IGOR
• Format: Patent
• Language: Chinese; English
• Published: 05.06.2013
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRICITY; GLASS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES; METALLURGY; MINERAL OR SLAG WOOL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

The present invention relates to a device for applying, in use, electromagnetic microwave radiation in a plasma inside a hollow glass substrate tube, which device comprises an annular space enclosed by a metal wall and further comprising an input port and an applicator slit, which is an output port acting as a radial waveguide, wherein, at said input port, a first end of an elongated microwave guide is attached, said microwave guide being in communication with microwave generating means via a second end of said microwave guide.