Flexible optical waveguide, process for its production, and epoxy resin composition for flexible optical waveguides
AssigneeNippon Shokubai Co., Ltd.
InventorsShimpei Sato, Kozo Tajiri, Yoko Matsui, Tomomi Makino
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Abstract
The present invention provides a flexible optical waveguide in which at least one of a lower cladding layer, a core layer, and an upper cladding layer is composed of an epoxy film formed using an epoxy resin composition containing a polyglycidyl compound having a polyalkylene glycol chain(s) and at least two glycidyl groups or an epoxy film having a glass transition temperature (Tg) of 100° C. or lower, a process for its production, and an epoxy resin composition for flexible optical waveguides.
Claims12
A flexible optical waveguide comprising a lower cladding layer, a core layer formed on the lower cladding layer, and an upper cladding layer formed on the lower cladding layer and the core layer in a manner of embedding the core layer therein, wherein at least one of the lower cladding layer, the core layer, and the upper cladding layer is composed of an epoxy film formed using an epoxy resin composition containing a polyglycidyl compound having a polyalkylene glycol chain(s) and at least two glycidyl groups.
A flexible optical waveguide comprising a lower cladding layer, a core layer formed on the lower cladding layer, and an upper cladding layer formed on the lower cladding layer and the core layer in a manner of embedding the core layer therein, wherein at least one of the lower cladding layer, the core layer, and the upper cladding layer is composed of an epoxy film having a glass transition temperature (Tg) of 100° C. or lower and the waveguide loss of the flexible optical waveguide is 0.24 dB/cm or lower.
An epoxy resin composition for flexible optical waveguides, comprising a polyglycidyl compound having a polyalkylene glycol chain(s) and at least two glycidyl groups, the composition having a refractive index after curing of from 1.45 to 1.65.
Dependencies are inferred from the claim text.