Polymide optical waveguide structures

Details Polymide optical waveguide structures Polymide optical waveguide structures

1995-12-13

1997-07-15

Ngo, John

Optical waveguides

Having particular optical characteristic modifying chemical...

Of waveguide cladding

528353, G02B 600

Patent

active

056490453

ABSTRACT:
Polyimide optical waveguide structures comprising a core within a cladding wherein at least one of the core and the cladding is a polyimide containing 6FDA; and the complementary portion of the waveguide structure is a polyimide having partial replacement of the 6FDA of the core or cladding composition by BPDA, and wherein the difference in the birefringence of the core and cladding are less than the difference in the refractive index. Copolyimides containing 6FDA and BPDA moieties, and at least one diamine, which have properties useful in optical applications including adjustable refractive index and controllable birefringence, low optical losses, low optical absorbance, increased solvent resistance, and high thermal stability. A method for adjusting the refractive index to make useful copolyimide core/cladding waveguide structures by controlling the 6FDA/BPDA ratio.

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