Abstract:
A non-linear optical device comprising a polymer configured to be photorefractive upon irradiation by a green laser. The polymer comprises a repeating unit including a moiety selected from the group consisting of the structures (M-1), (M-2) and (M-3), as defined herein.
Abstract:
An optical device composition of the present invention includes a trifluorovinyl group containing polyimide that is crosslinkable and thermally stable after crosslinking. The invention relates to a polyimide composition which provides either passive or active wave-guide optical capabilities. More particularly since the composition comprises a chromophore which shows non-linear optical ability, the composition can be used for an active wave guide material, such as modulator or switching device compositions. Furthermore, the composition may include a trifluorovinyl containing chromophore and polyimide which comprises non-linear optical ability in the matrix polymer system.
Abstract:
Crosslinkable polymeric materials are disclosed useful for the temporal stabilization of a poling- induced noncentrosymmetric host lattice containing guest nonlinear optical chromophores . The materials are also suitable as, crosslinkable coatings in the absence of chromophores. Also disclosed is a method of srosslinking such polymeric material comprising reacting i)a crosslinkable polymeric material comprising olefin groups and ii) a crosslinking agent comprising electron deficient olefin groups, at a temperature at which crosslinking occurs.
Abstract:
There are provided conjugated systems of formula (I) based on stilbene derivatives serving as improved Donor-Acceptor-Donor compounds and their use in non linear optics including chromophoric optical medium of a 3-dimensional optical memory.
Abstract:
The invention relates to an electroluminescent panel which is equipped with light extraction elements. According to the invention, each optical light extraction element (20, 30) comprises: an input interface (21, 31) which is optically coupled with the emissive surface of the cells or that of the substrate of the panel in such a way as to capture the rays emitted by said cells, an output interface (23, 33) having a suitable shape such that the rays emitted by the cells pass therethrough, and, optionally, a reflecting surface (32) which modifies the path of said rays such as to reduce the incidence angle with the aforementioned output interface. In this way, the light emitting efficiency of the panel is significantly improved.
Abstract:
Novel compositions and synthetic methods for forming nonlinear optic polymers, which may be incorporated into multiple light-based devices, are disclosed. These compositions include crosslinkable chromophoric monomer units that incorporate nonlinear optic chromophores, linking monomers that may be used to link chromophoric monomers, and polymers made from crosslinkable chromophoric monomers or chromophoric monomers in combination with linking monomers. The polymers can exhibit high thermal stability, which is believed to arise from their covalently bonded chromophore structures. In one aspect, linking monomers are disclosed that may be crosslinked.
Abstract:
Novel compositions and synthetic methods for forming nonlinear optic polymers, which may be incorporated into multiple light-based devices, are disclosed. These compositions include chromophoric monomer units that incorporate nonlinear optic chromophores, linking monomers that may be used to link chromophoric monomers, and polymers made from chromophoric monomers or chromophoric monomers in combination with linking monomers. The polymers can exhibit high thermal stability, which is believed to arise from their covalently bonded chromophore structures. In addition to their covalently bonded chromophore structures, in one aspect, nonlinear optic polymers are disclosed that may be crosslinked to further increase the thermal and dipole stability of the polymers.
Abstract:
The invention concerns a method for obtaining an electrooptic material characterised in that it consists in depositing on a substrate a solution of oligoimides whereon are grafted colouring agents capable of being oriented and in performing a treatment designed to cross-link the oligoimides and to provide orientation to the colouring agents.
Abstract:
The invention concerns a material capable of being light-cured and micro-structured entirely or partly by visible light essentially comprising a monomer matrix having at least three crosslinkable functions, said matrix containing a chromophore and a photosensitizer exhibiting an absorption peak in the distinct visible domain, separate from that of the chromophore, said material being capable, when crosslinked, of exhibiting, in the crosslinked part, a local increase of viscosity and of refractive index. The invention also concerns a crosslinked material entirely or partly micro-structured by visible light of the crosslinkable material, said material exhibiting in the crosslinked part a local increase of viscosity and of refractive index. The invention further concerns an optical integrated circuit comprising said crosslinked material and a method for preparing said circuit.
Abstract:
The present invention is directed to chromophores having novel electron withdrawing groups and novel bivalent cyclic bridges and to optical waveguides and optical devices having polymeric thin films which contain the novel chromophores.