Optical waveguides – Optical fiber waveguide with cladding
Reexamination Certificate
2005-09-13
2005-09-13
Healy, Brian M. (Department: 2883)
Optical waveguides
Optical fiber waveguide with cladding
C385S129000, C385S128000, C385S141000, C385S143000, C385S145000, C427S163100
Reexamination Certificate
active
06944380
ABSTRACT:
It is an object of the present invention to provide an optical fiber for transmitting ultraviolet ray which has an improve transmittance and is prevented from deterioration by ultraviolet ray with which it is irradiated. It is another object of the present invention to provide an optical fiber probe which can propagate vacuum ultraviolet ray and deep ultraviolet ray at a high transmittance, is deteriorated only to a limited extent when irradiated with ultraviolet ray and can be etched to have a desired shape of the sharpened section at the fiber end.The present invention provides the optical fiber for transmitting ultraviolet ray which has a core5of silica glass containing a given content of fluorine and a clad6aof silica glass containing a given content of fluorine or boron, a clad6bof a resin which transmits ultraviolet ray or a clad6chaving air holes H. The clad may be coated with a protective layer and further with a covered layer for protection. In particular, the core, clad and protective layer have a high transmittance for ultraviolet ray and resistance to ultraviolet ray with which they are irradiated, when treated with hydrogen.An optical fiber probe1has an optical fiber2provided with a sharpened section3at the end, which is sharpened with an etchant solution, the sharpened section3being coated with a light-shielding metallic film4.
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Gen Tochitani
Hideo Hosono
Masahiro Hirano
Masanori Oto
Shinnya Kikugawa
Healy Brian M.
Japan Science and Technology Agency
Lorusso & Loud
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