Optical waveguides – Optical fiber waveguide with cladding
Reexamination Certificate
2006-07-18
2006-07-18
Lee, John D. (Department: 2874)
Optical waveguides
Optical fiber waveguide with cladding
C065S385000
Reexamination Certificate
active
07079738
ABSTRACT:
An optical fiber for optical amplification, characterized in that a full width at half maximum of gain spectrum is 45 nm or more; and a maximum value of power conversion efficiency is 80% or more. A method for producing a rare earth element-doped glass for use in manufacturing the optical fiber, which comprises a deposition step of depositing fine silica glass particles and a co-dopant (a) to prepare an aggregate of fine silica glass particles doped with the co-dopant (a); and a immersion step of immersing the aggregate of fine silica glass particles prepared in the deposition step in a solution containing the rare earth element and the co-dopant (b) to thereby dope the aggregate of fine silica glass particles with the rare earth element component and the co-dopant (b).
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Aiso Keiichi
Koaizawa Hisashi
Moriai Yoko
Nakamura Toshihiro
Yagi Takeshi
Lee John D.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Stahl Mike
The Furukawa Electric Co. Ltd.
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