Optical waveguides – Optical fiber waveguide with cladding – Utilizing multiple core or cladding
Patent
1991-04-05
1992-05-12
Ullah, Akm E.
Optical waveguides
Optical fiber waveguide with cladding
Utilizing multiple core or cladding
385 49, G02B 514
Patent
active
051134713
ABSTRACT:
In the optical waveguide array according to the present invention, a clad portion and cores formed by curing photocurable resins are sandwiched between two reinforcing members, at least one of which has a light transmitting characteristic. The clad portion covers the cores. The method of manufacturing the optical waveguide array according to the present invention comprises applying a first photocurable resin to a mold having an optical waveguide pattern of the optical waveguide array; placing a first reinforcing member having a light transmitting characteristic closely on the upper surface of the photocurable resin and then radiating light from above the first reinforcing member to form a clad layer having grooves corresponding to the optical waveguide pattern, the clad layer being bonded firmly to the first reinforcing member; pouring a second photocurable resin, having a refractive index higher than that of the first photocurable resin, into the grooves of the clad layer; radiating light from above the first reinforcing member to cure the second photocurable resin to thereby form cores; applying a third photocurable resin, having a refractive index lower than that of the second photocurable resin, onto the core-formed surface of the clad layer and then placing a second reinforcing member on the third photocurable resin; and radiating light from above the first reinforcing member to cure the third photocurable resin applied to the core-formed surface of the clad layer to thereby form a photocured resin layer and bonding the second reinforcing member firmly to the photocured resin layer. Alternatively, if the second reinforcing member is also has a light transmitting characteristic, light can be radiated through the second reinforcing member to cure the third photocurable resin.
REFERENCES:
patent: 3899235 (1975-08-01), Arnaud et al.
patent: 4877306 (1989-10-01), Kar
patent: 4979798 (1990-12-01), Lagakos et al.
Inaishi Kouji
Shinkai Yuji
Yoshimura Chisato
Brother Kogyo Kabushiki Kaisha
Ullah Akm E.
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