Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Optical fiber – waveguide – or preform
Patent
1998-03-06
2000-10-17
Vargot, Mathieu D.
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Optical fiber, waveguide, or preform
264 127, 425 71, 425 722, 4251742, B29D 1100
Patent
active
06132650&
ABSTRACT:
A base polymer is mixed with a non-polymerizable compound having a higher refractive index to form a fiber material. This material is continuously transformed into a fiber in a fiber-preparing unit. The fiber is dipped in diffusion tanks containing monomer substances so as to diffuse these substances into the fiber, and cured in a heater so as to polymerize these substances. By alternatingly repeating this procedure, the monomer substances and the non-polymerizable compound are diffused in the fiber and form a graded refractive index. Next, the fiber is drawn, coated with a cladding and coiled. This method can be performed with a high running ratio, minimizing the necessity of scaling-up of the facilities when the production is increased, and easily confers a desired index grading on the fiber. Likewise, the method allow continued manufacturing of a graded refractive index plastic optical-fiber with a desired length and of constant quality.
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patent: 6013205 (2000-01-01), Nakamura
Sumitomo Wiring Systems Ltd.
Vargot Mathieu D.
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