The present invention provides an optical waveguide photosensitive resin composition containing a resin component and a photoacid generator, wherein the photoacid generator has a characteristic property (x) such that an absorption limit (OO transition energy) calculated based on the shape of an ultraviolet spectrum obtained by spectrometrically analyzing a 0.1 wt % propylene carbonate solution of the photoacid generator by means of an ultraviolet/visible spectrophotometer is 3.5 to 4.1 eV. Where an optical waveguide core layer is formed by using the inventive optical waveguide photosensitive resin composition, for example, the optical waveguide core layer has a lower loss, and is excellent in patternability and reflow resistance.

Problem to Be Solved: to provide a chromophore having a far superior nonlinear optical activity to conventional chromophores and to provide a nonlinear optical element comprising said chromophore. Solution: a chromophore comprising a donor structure D, a -conjugated bridge structure B, and an acceptor structure A, the donor structure D comprising an aryl group substituted with a substituted oxy group; and a nonlinear optical element comprising said chromophore.

The material stack of the present disclosure can be used for fabricating optical waveguides that are thin and flexible, and that can bend light around small turns. The stack of materials can include a polymer core and a cladding, which together can create a large difference in refractive index. As a result, light can remain within the core even when bent around radii where standard glass fibers could fail.

An optical fiber with ultra-low attenuation and bend insensitivity includes a core layer and cladding layers. The cladding layers have an inner cladding layer surrounding the core layer, a trench cladding layer surrounding the inner cladding layer, an auxiliary outer cladding layer surrounding the trench cladding layer, and an outer cladding layer surrounding the auxiliary outer cladding layer. The core layer has a radius of 3.0-3.9 m, and a relative refractive index difference of 0.04% to 0.12%. The inner cladding layer has a radius of 8-14 m, and a relative refractive index difference of about 0.35% to 0.10%. The trench cladding layer has a radius of about 14-20 m, and a relative refractive index difference of about 0.6% to 0.2%. The auxiliary outer cladding layer has a radius of about 35-50 m, and a relative refractive index difference of about 0.4% to 0.15%. The outer cladding layer is a pure silicon-dioxide glass layer.

A dielectric waveguide comprising a dielectric probe at each end, wherein the dielectric probes are arranged to transfer energy.

Fluorinated siloxane compositions, and methods of making and using the fluorinated siloxanes are disclosed. The polymers described herein may exhibit self-healing properties, a low dielectric constant, and a low refractive index. In some embodiments, a method of making a siloxane compound may involve contacting a silicon metal with a fluorinated compound to form a dichlorosilane compound, hydrolyzing the dichlorosilane compound to form a fluorinated tetrasiloxane compound, and contacting the fluorinated tetrasiloxane compound with a metal catalyst to form a fluorinated cyclic siloxane (D4) compound.

The present invention provides a photosensitive epoxy resin composition for an optical waveguide. The photosensitive epoxy resin composition contains: (A) a cresol novolak polyfunctional epoxy resin, the cresol novolak polyfunctional epoxy resin not being fluorene skeleton-containing epoxy resins (C) and (D); (B) a solid bisphenol-A epoxy resin; (C) a solid fluorene skeleton-containing epoxy resin; (D) a liquid fluorene skeleton-containing epoxy resin; and (E) a cationic curing initiator, wherein the components (A) to (E) are each present in a proportion falling within a predetermined range based on the amount of the overall epoxy resin component. Therefore, the photosensitive epoxy resin composition is excellent in coatability, patterning resolution, roll-to-roll process adaptability and the like, and has higher transparency and heat resistance.

The manufacturing method of an optical waveguide of the present invention includes a step of preparing a pre-exposure laminate including a substrate and a core forming layer laminated on the substrate, a step of irradiating the core forming layer with active radiation to obtain a post-exposure laminate which has a core layer including a core portion corresponding to a non-irradiated region with the active radiation and a side cladding portion corresponding to an irradiated region with the active radiation, and has the substrate supporting the core layer, a step of laminating a cladding layer on the core layer included in the post-exposure laminate to obtain a workpiece, and a step of cutting out an optical waveguide from the workpiece, in which the irradiated region includes a frame-shaped part extending along an outer edge of the core forming layer and having a frame shape, and an area of the irradiated region is 20% or more of an entire area of the core forming layer.

An optical waveguide photosensitive resin composition containing an aliphatic resin having a polymerizable substituent and a photopolymerization initiator, in which the aliphatic resin having the polymerizable substituent is formed of a side-chain polyfunctional aliphatic resin (A) and a bifunctional long-chain aliphatic resin (B), is provided. Accordingly, the composition brings together high transparency, satisfactory roll-to-roll compatibility, and a high resolution patterning property, and has excellent reflow resistance. Therefore, the composition is useful as a material for forming an optical waveguide, especially a core layer-forming material.

In some embodiments, a head-mounted augmented reality display system comprises one or more hybrid waveguides configured to display images by directing modulated light containing image information into the eyes of a viewer. Each hybrid waveguide is formed of two or more layers of different materials. The thicker of the layers is a highly optically transparent core layer, and the thinner layer comprises a pattern of protrusions and indentations to form, e.g., a diffractive optical element. The pattern may be formed by imprinting. The hybrid waveguide may include additional layers, e.g., forming a plurality of alternating core layers and thinner patterned layers. Multiple waveguides may be stacked to form an integrated eyepiece, with each waveguide configured to receive and output light of a different component color.