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US 4,936,645 AGranted
Waveguide electrooptic light modulator with low optical loss
AssigneeHoechst Celanese Corporation
InventorsHyun-Nam Yoon, Chia C. Teng
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Abstract
In one embodiment this invention provides a thin film waveguide electrooptic light modulator which consists of (1) a laminated assembly of a waveguiding thin film of an organic polymer which exhibits second order nonlinear optical response, and upper and lower organic polymer blend cladding layers, each of which has a lower index of refraction between about 0.002-0.02 lower than the waveguiding thin film and which exhibits second order nonlinear optical response; and (2) electrodes which are positioned to apply an electric field to the laminated assembly.
Claims18
A waveguide medium for optical modulation which comprises:
- a. a waveguiding organic thin film component which exhibits second order nonlinear optical susceptibility .chi..sup.(2) ;
- and
- b. an upper cladding layer and a lower cladding layer, each of which consists of a transparent organic polymer blend medium which exhibits second order nonlinear optical susceptibility .chi..sup.(2) ;
- wherein the waveguiding thin film component comprises an organic polymer with pendant side chains which exhibit second order nonlinear optical susceptibility .beta., and each cladding layer contains at least one polymer with pendant side chains which exhibit second order nonlinear optical susceptibilibility .beta., and each cladding layer has an index of refraction between about 0.002-0.02 lower than the waveguiding component.
1 more element
A thin film waveguide electrooptic light modulator which consists of a laminated assembly of substrates comprising:
- a. a waveguiding thin film of an organic polymer component having a thickness of about 4-10 microns, which exhibits second order nonlinear optical susceptibility .chi..sup.(2) ;
- b. upper and lower cladding layers, each of which consists of an organic polymer blend medium which has an index of refraction between about 0.002-0.02 lower than the waveguiding thin film component, and which exhibits second order nonlinear optical susceptibility .chi..sup.(2) ;
- and
- c. electrodes which are positioned to apply an electric field to the assembly of waveguiding thin film and cladding layers.
1 more element
A channel waveguide electrooptic phase modulator comprising:
- a. A single mode linear waveguide channel with thickness and width dimensions of about 3-10 microns respectively, which consists of a laminated assembly of substrates comprising:
- (1) a waveguiding thin film of an organic polymer component which exhibits second order nonlinear optical susceptibility .chi..sup.(2) ;
- (2) upper and lower cladding layers, each of which consists of an organic polymer blend medium which has an index of refraction between about 0.002-0.02 lower than the waveguiding thin film component, and which exhibits second order nonlinear optical susceptibility .chi..sup.(2) ;
- and
- b. electrodes which are positioned to apply an electric field to the waveguide channel.
2 more elements
An interferometric waveguide electrooptic modulator comprising:
- a. first and second single mode waveguide channels with thickness and width dimensions of about 3-10 microns respectively, diverging from a common light input to form co-extensive channels of substantially identical optical length, and reconverging to a common light output, wherein the waveguide channels are composed of a laminated assembly of organic substrates comprising:
- (1) a waveguiding organic thin film component which exhibits second order nonlinear optical susceptibility .chi..sup.(2) ;
- (2) an upper organic polymer blend polymer blend cladding layer and a lower organic polymer blend cladding layer, each of which has a lower index of refraction than the waveguiding thin film component, and which exhibits second order nonlinear optical susceptibility .chi..sup.(2) ;
- and
- b. a set of spaced electrodes positioned in proximity along a channel to facilitate the application of an electric field to the channel organic medium, wherein the organic medium zone between the spaced electrodes has a noncentrosymmetric molecular orientation which is parallel to the direction of an applied electric field.
2 more elements
A channel waveguide electrooptic modulator having a directional coupling configuration which comprises:
- a. first and second single mode waveguide channels in a parallel and co-extensive proximity with thickness and width dimensions of about 3-10 microns respectively, wherein each channel consists of laminated assembly of substrates comprising:
- (1) a waveguiding thin film of an organic polymer component which exhibits second order nonlinear optical susceptibility .chi..sup.(2) ;
- (2) upper and lower cladding layers, each of which consists of an organic polymer blend medium which has an index of refraction between about 0.002-0.02 lower than the waveguiding thin film component, and which exhibits second order nonlinear optical susceptibility .chi..sup.(2) ;
- and
- b. electrodes which are positioned to apply an electric field to the waveguide channels.
2 more elements
A channel waveguide electrooptic modulator having a cross-bar switching configuration which comprises:
- a. first and second single mode waveguide channels with thickness and width dimensions of about 3-10 microns which intersect to form a junction, wherein each channel consists of a laminated assembly of substrates comprising:
- (1) a waveguiding thin film of an organic polymer component which exhibits second order nonlinear optical susceptibility .chi..sup.(2) ;
- (2) upper and lower cladding layers, each of which consists of an organic polymer blend medium which has an index of refraction between about 0.002-0.02 lower than the waveguiding thin film component, and which exhibits second order nonlinear optical susceptibility .chi..sup.(2) ;
- and
- b. electrodes which are positioned to apply an electric field to the channel junction.
2 more elements
Dependencies are inferred from the claim text.