Patent application number | Description | Published |
20080298760 | Thermally Stabilized Waveguides - An apparatus comprising a planar optical waveguide having an optical core and optical cladding next to the optical core. The optical core or cladding includes a plurality of particles therein. Each particle has a nucleus and polymeric molecules permanently bonded to the nucleus to form a shell. A plurality of nuclei are dispersed in said core or cladding. | 12-04-2008 |
20090148597 | THERMALLY STABILIZED WAVEGUIDES - An apparatus comprising a planar optical waveguide having an optical core and optical cladding next to the optical core. The optical core or cladding includes a plurality of particles therein. Each particle has a nucleus and polymeric molecules permanently bonded to the nucleus to form a shell. A plurality of nuclei are dispersed in said core or cladding. | 06-11-2009 |
20090169148 | QAM optical modulators - An exemplary optical modulator includes an interferometer. The interferometer includes an input optical coupler, an output optical coupler, and two or more controllable optical waveguides. Each controllable optical waveguide connects the input optical coupler to the output optical coupler and has an electro-absorption modulator along a segment thereof. Two of the controllable optical waveguides are connected to transmit to an output of the output optical coupler light of substantially different maximum amplitude. | 07-02-2009 |
20090214150 | INTEGRATED POLARIZATION SPLITTER/COMBINER - Provided is an apparatus and method for use thereof. The apparatus, in one embodiment, includes a 1x2 coupler in communication with a waveguide. The 1x2 coupler, in this embodiment, is configured to separate an input finite bandwidth optical signal provided from the optical waveguide into two similar optical signals. Input ends of first and second waveguide arms, in one embodiment, are in communication with the 1x2 coupler and configured to receive ones of the input optical signals. An inherent birefringence of each of the first and second waveguide arms may be substantially similar. Moreover, the first and second waveguide arms have different physical path lengths that differ by an amount (ΔL). Additionally, a 2x2 coupler may be in optical communication with an output end of the first and second waveguide arms and configured to provide an output TE polarization and an output TM polarization. | 08-27-2009 |
20090245713 | INTEGRATED TUNABLE OPTICAL EQUALIZER - Provided is an apparatus and method for use thereof. The apparatus, in one embodiment, includes first and second 1×N couplers integrated on a substrate and configured to receive an optical symbol having an intended time slot, N being at least three. The apparatus, in this embodiment, further includes N waveguide arms integrated on the substrate, having modulators and coupled between the first and second 1×N couplers. The apparatus, in this embodiment, additionally, includes a modulator controller configured to drive the modulators such that, following transmission over a distance, components of the optical symbol outside of the intended time slot are attenuated relative to components within the intended time slot. | 10-01-2009 |
20090285519 | INTEGRATED TUNABLE OPTICAL EQUALIZER - Provided is an apparatus and method for use thereof. The apparatus, in one embodiment, includes first and second 1×N couplers integrated on a substrate and configured to receive an optical symbol having an intended time slot, N being at least three. The apparatus, in this embodiment, further includes N waveguide arms integrated on the substrate, having modulators and coupled between the first and second 1×N couplers. The apparatus, in this embodiment, additionally, includes a modulator controller configured to drive the modulators such that, following transmission over a distance, components of the optical symbol outside of the intended time slot are attenuated relative to components within the intended time slot. | 11-19-2009 |
20100046886 | PLANAR POLARIZATION SPLITTER - An apparatus comprising a planar optical structure that includes an input coupler, first and second planar waveguides and an output coupler, all on a planar substrate. The input coupler is configured to divide an incoming light into two input light beams. Each of the first and second waveguides is configured to receive one of the two input light beams. The first waveguide has a first core with a width that is greater than a width of a second core of the second waveguide. At least one of the first or second planar waveguides is birefringent. The output coupler is configured to receive the light beams after passage through the first and second waveguides. A first output light beam from the output coupler is substantially TE polarized light and a second output light beam from the output coupler is substantially TM polarized light. | 02-25-2010 |
20100054761 | Monolithic coherent optical detectors - An optical receiver has a monolithically integrated electrical and optical circuit that includes a substrate with a planar surface. Along the planar surface, the monolithically integrated electrical and optical circuit has an optical hybrid, one or more variable optical attenuators, and photodetectors. The optical hybrid is connected to receive light beams, to interfere light of said received light beams with a plurality of relative phases and to output said interfered light via optical outputs thereof. Each of the one or more variable optical attenuators connects between a corresponding one of the optical outputs and a corresponding one of the photodetectors. | 03-04-2010 |
20100111466 | QAM optical modulators - An exemplary optical modulator includes an interferometer. The interferometer includes an input optical coupler, an output optical coupler, and two or more controllable optical waveguides. Each controllable optical waveguide connects the input optical coupler to the output optical coupler and has an electro-absorption modulator along a segment thereof. Two of the controllable optical waveguides are connected to transmit to an output of the output optical coupler light of substantially different maximum amplitude. | 05-06-2010 |
20100216275 | PHOTONIC INTEGRATION SCHEME - Provided is an apparatus and method for manufacture thereof. The apparatus includes a passive optical waveguide structure and a photodiode detector structure. The structures are located on a substrate, and the photodiode detector is laterally proximate to the semiconductor passive waveguide structure. The passive optical waveguide structure includes a first lateral portion of a semiconductor optical core layer on the substrate, a semiconductor upper optical cladding layer on the optical core layer, and a first lateral portion of a doped semiconductor layer on the upper optical cladding layer. The photodiode detector structure includes a second lateral portion of the semiconductor optical core layer, a semiconductor optical absorber layer on the optical core layer, and a second lateral portion of the doped semiconductor layer. | 08-26-2010 |
20120183304 | Multi-Core Optical Fiber And Optical Communication Systems - An apparatus includes an optical fiber having a plurality of optical cores therein. Each optical core is located lateral in the optical fiber to the remaining one or more optical cores and is able to support a number of propagating optical modes at telecommunications wavelengths. Each number is less than seventy. | 07-19-2012 |
20120230690 | Adjustable Multiple-Channel Optical Switch - An apparatus includes a wavelength-selective switch having an optical demultiplexer having N optical outputs, a first optical multiplexer having N optical inputs, a second optical multiplexer having N optical inputs, and a plurality of controllable 1×P optical switches. Integer P is greater than or equal to 2. Each of the optical switches is connected to a corresponding one of the optical outputs of the optical demultiplexer and is connected to corresponding ones of the optical inputs of the respective first and second optical multiplexers. The optical AWG demultiplexer has an optical AWG sampling coefficient of one or more for light with a wavelength in the optical telecommunication C-band, L-band, or S-band. | 09-13-2012 |
20120251126 | Optical Fibers With Tubular Optical Cores - An embodiment of an apparatus includes an optical fiber for which a complete orthogonal basis of propagating modes at an optical telecommunication frequency includes ones of the propagating modes with different angular momenta. The optical fiber has a tubular optical core and an outer optical cladding in contact with and surrounding the tubular optical core. The tubular optical core has a larger refractive index than the optical cladding. The tubular optical core is configured such that those of the propagating modes whose angular momenta have the lowest magnitude for the propagating modes have substantially the same radial intensity profile. | 10-04-2012 |