Abstract: Provided is an optical multiplexing circuit. The waveguide width of each waveguide is set such that the effective refractive index of a first optical waveguide with a first light beam in the 0-th order mode is equal to the effective refractive index of a MM conversion waveguide with the first light beam in the higher order mode and that the effective refractive indexes of the MM conversion waveguide with second and third light beams in the higher order mode are not equal to the effective refractive indexes of a second optical waveguide with the second and third light beams in the 0-th order mode.

Abstract: Various embodiments of a monolithic electro-optical (E-O) modulator are described herein. The monolithic E-O modulator may include a phase shifter having a suspended structure. The suspended structure may be realized by partially or completely removing silicon material underneath the active area of the phase shifter to form a void in the bulk silicon substrate supporting the phase shifter. The suspended structure may be utilized to result in a lower radio-frequency loss and an effective group refractive index of the phase shifter that is closer to the refractive index of silicon waveguides or optical fibers, both advantageous to enhancing the performance of the E-O modulator such as a higher operating bandwidth.

Abstract: Photodiode structures and methods of manufacture are disclosed. The method includes forming a waveguide structure in a dielectric layer. The method further includes forming a Ge material in proximity to the waveguide structure in a back end of the line (BEOL) metal layer. The method further includes crystallizing the Ge material into a crystalline Ge structure by a low temperature annealing process with a metal layer in contact with the Ge material.

Abstract: A face-lit waveguide illumination system employing a planar slab or plate of an optically transmissive material. A light source is optically coupled a linear optical element which is formed in or attached to a face of the waveguide and is configured to inject light at an angle permitting for light propagation by means of a total internal reflection. Light is propagated through the waveguide towards a predetermined direction in response to optical transmission and total internal reflection. Light extraction features located along the prevailing path of light propagation extract light from the waveguide and emit such light towards a surface normal direction.

Abstract: The present invention relates to an optical system, wherein the optical system comprises a transparent optic defining an optical volume, the transparent optic comprising a first main face adapted to admit light into the optical volume and a first turning optic for turning the light admitted inside the optical volume such that the light is internally reflected within the optical volume.

Abstract: A light guide device made of a light diffusing agent-free light transmissive material is disclosed to include a base provided with a light-incident surface at one side thereof to face toward the light-emitting side of a plurality of predetermined light-emitting devices, and a plurality of continuously connected and irregularly configured light guide components located on at least one side of the base and capable of unevenly projecting light passing therethrough toward the outside and respectively provided with at least three light-emitting surfaces, each light-emitting surface defining with the base a respective contained angle that causes a glare effect when light passes through the respective the light guide component.

Abstract: A flexible waveguide structure including a waveguide on a flexible substrate, both having transparent windows in the mid-infrared range, may serve as a photonic chemical sensor for measuring characteristic absorptions of analytes brought in physical contact with the waveguide. Such a sensor may, in accordance with some embodiments, be formed by an aluminum-nitride waveguide on a borosilicate substrate.

Abstract: Generally, techniques related to an optical computer system and use thereof are described. In an example, an optical computer system includes a multi-purpose optical device, an imager, and an image sensor. The multi-purpose optical device is configured for different purposes, such as for data storage and for compute operations. The configuration utilizes diffractive optical layers that include different diffraction elements. The imager displays an image to the multi-purpose optical device. The image encodes command-related data depending on the purpose to be invoked, such a data location for a data read or input for a compute command. Light of the image travels to the multi-purpose device and is diffracted from the diffractive optical layers. The diffracted light is detected by the image sensor that converts it into an output.

Abstract: An optical waveguide formed at the same layer as that of a microscopic optical device and a spot size converter largely different in size are integrally formed. A semiconductor device has an optical waveguide part functioning as a spot size converter. The optical waveguide part includes a plurality of optical waveguide bodies penetrating through an interlayer insulation layer in the thickness direction.

Abstract: Examples disclosed herein relate to multi-wavelength semiconductor lasers. In some examples disclosed herein, a multi-wavelength semiconductor laser may include a silicon-on-insulator (SOI) substrate and a quantum dot (QD) layer above the SOI substrate. The QD layer may include and active gain region and may have at least one angled junction at one end of the QD layer. The SOI substrate may include a waveguide in an upper silicon layer and a mode converter to facilitate optical coupling of a lasing mode to the waveguide.

Abstract: The present disclosure relates to a flat panel display embedding an optical imaging sensor such as a fingerprint image sensor. The present disclosure suggests a flat panel type optical image sensor comprising: a cover plate having a sensing area; a light incident film disposed at a side under the cover plate; a light radiating film disposed under the cover plate corresponding to the sensing area; a low refractive layer under the light incident film and the light radiating film; a light source disposed under the light incident film; and a light sensor disposed under the light incident film.

Abstract: An optical subassembly includes a planar dielectric waveguide structure that is deposited at temperatures below 400 C. The waveguide provides low film stress and low optical signal loss. Optical and electrical devices mounted onto the subassembly are aligned to planar optical waveguides using alignment marks and stops. Optical signals are delivered to the submount assembly via optical fibers. The dielectric stack structure used to fabricate the waveguide provides cavity walls that produce a cavity, within which optical, optoelectronic, and electronic devices can be mounted. The dielectric stack is deposited on an interconnect layer on a substrate, and the intermetal dielectric can contain thermally conductive dielectric layers to provide pathways for heat dissipation from heat generating optoelectronic devices such as lasers.

Abstract: A scaffold includes struts that intersect at nodes. In some instances, a cross section of the cores has at least one dimension less than 100 microns. The core can be a solid, liquid or a gas. In some instances, one or more shell layers are positioned on the core.

Abstract: The embodiments herein describe an optical transmitter that integrates a SCOWA into a photonic chip that includes a modulator. The embodiments herein place the SCOWA between the laser and the modulator. To accommodate the large mode size of the waveguide in the SCOWA, the photonic chip includes a pair of spot size converters coupled to the input and output of the SCOWA. Rather than amplifying a modulated signal as is typical with an inline amplifier, the SCOWA amplifies a continuous wave (CW) optical signal generated by the laser which introduces less noise and improves the OSNR of the transmitter.

Abstract: An optical coupler comprises a waveguide structure including a first waveguide layer having proximal and distal ends, the first waveguide layer including a first pair of waveguides that extend from the proximal end along a first portion, wherein the first pair of waveguides each widen along a second portion such that the first pair of waveguides merge into a single waveguide. A second waveguide layer is separated from the first waveguide layer, with the second waveguide layer having proximal and distal ends, the second waveguide layer including a second pair of waveguides that extend from the proximal end of the second waveguide layer along a first portion of the second waveguide layer, wherein the second pair of waveguides each narrow along a second portion of the second waveguide layer to separate distal tips. The waveguide structure matches an integrated photonics mode to a fiber mode supported by an optical fiber.

Abstract: An electronic device includes a transmission line and a circuit board. The transmission line includes a signal conductor, a base material, a first external connection conductor, a second external connection conductor, and a ground conductor, and defines a stripline. The circuit board includes a first mounting land conductor, a second mounting land conductor, and a radiation reduction conductor. The first mounting land conductor and the second mounting land conductor are provided in a concave portion on the surface of the circuit board, and are respectively connected to the first external connection conductor and the second external connection conductor. The radiation reduction conductor is provided on the lateral surface of the concave portion in which the transmission line is disposed, and is in contact with or adjacent to the first lateral surface and the second lateral surface of the base material.

Abstract: Provided is a polymer film which can eliminate both moire and glitter and is suitable for use as a diffusion film. The above-mentioned problems are solved with a polymer film, a surface of which has an arithmetic average roughness Ra of 0.63-1.80 ?m, a root mean square roughness Rq of 0.76-2.40 ?m, and an average height Rc of roughness-curve elements of 2.45-7.20 ?m.

Abstract: A display device includes a light source device, and a color converter optically coupled with the light source device. An array of regions of the light source device is configured to emit light of a first color. The color converter includes an array of color conversion regions including color conversion regions of a first type and of a second type. The color conversion regions of the first type are configured to convert the light of the first color into light of a second color. The color conversion regions of the second type are configured to convert the light of the first color into light of a third. A respective color conversion region of the array of color conversion regions includes a respective photonic crystal structure defining a respective two-dimensional pattern. The respective color conversion region also includes a color conversion matrix that includes color converting nanoparticles.

Abstract: An optical ferrule includes a substrate formed of a diced wafer and a molded structure formed on the substrate. The molded structure may be formed of a curable material. The molded structure may include a plurality of grooves for positioning a plurality of optical fibers therealong, respectively, a plurality of reflective surfaces formed to reflect optical signals from ends of the plurality of optical fibers, respectively, or reflect incident optical signals towards the ends of the plurality of optical fibers, respectively, and an alignment structure disposed to be aligned to a corresponding alignment structure of a socket to which the optical ferrule is coupled.

Abstract: Prism coupling systems and methods for characterizing curved parts are disclosed. A coupling surface of a coupling prism is interfaced to the curved outer surface of the curved part to define a coupling interface. Measurement light is directed through the coupling prism and to the interface, wherein the measurement light has a width of 3 mm or less. TE and TM mode spectra reflected from the interface are digitally captured. These mode spectra are processed to determine at least one characteristic of the curved part, such as the stress profile, compressive stress, depth of layer, refractive index profile and birefringence.

Abstract: An optical circuit board sheet which has little or no warpage to have no cracking in cores, and an opto-electric hybrid board sheet including the same are provided. The optical circuit board sheet includes: an insulative sheet; an under cladding layer formed on a first surface of the insulative sheet; and at least one core formed on a surface of the under cladding layer. A hole is formed in a portion of the surface of the under cladding layer other than where the core is formed. The area percentage of an opening area of the hole is in the range of 5% to 99% with respect to the first surface of the insulative sheet.

Abstract: A neural probe for light stimulation of a tissue is provided. The probe includes a base that has light supplying circuitry, and one or more elongated microsized shanks extending from the base. Each shank has a longitudinal axis and includes one or more waveguides extending along the shank's length, with the waveguides being optically connected to the light supplying circuitry. In addition, each of the waveguides is optically connected to a diffraction grating coupler that emits a light beam from the shank when light passes from the base through the waveguide and to the diffraction grating coupler. The emitted light beam has a propagation direction at a set angle relative to an axis that is substantially normal to the longitudinal axis of the shank. A method for stimulating a tissue using the neural probe is also provided.

Abstract: Provided is an optical branching/coupling device in which optical transmission quality is improved by preventing a reduction in optical transmission quality, the reduction being due, for example, to an optical waveguide core affecting a light of another optical waveguide core in the vicinity of a joining section of the two optical waveguide cores. This optical branching/coupling device includes: a first optical waveguide that is provided extending from one end side to other end side; a second optical waveguide that is provided extending on a separate route from the one end side to the other end side, the other end side of the second optical waveguide being joined to the other end side of the first optical waveguide; and a cladding layer that covers the periphery of the first optical waveguide and the second optical waveguide, wherein the first and second optical waveguides comprise a cured product of a photocuring resin.

Abstract: Disclosed is an optical valve or light valve for providing large area collimated illumination from localized light sources, and system and method thereof for 2D, 3D, and/or autosteroscopic displays. An optical valve may include a stepped structure, in which the steps include separated extraction features which may be optically hidden to light propagating in a first direction. Light propagating in a second direction may be refracted, diffracted, or reflected by the features to provide illumination beams exiting from the top surface of the optical valve. Such controlled illumination may provide for efficient, multi-user autostereoscopic displays as well as improved 2D display functionality.

Abstract: Structures for an electro-optic modulator and methods of fabricating such structures. A first plurality of cavities are formed in a bulk semiconductor substrate. A passive waveguide arm includes a first core arranged over the first plurality of cavities. The passive waveguide arm has an input port and an output port that is spaced lengthwise from the input port. An epitaxial semiconductor layer is arranged over the bulk semiconductor substrate, and includes a second plurality of cavities. An active waveguide arm includes a second core that is arranged over the second plurality of cavities. The second core of the active waveguide arm is coupled with the input port of the first core of the passive waveguide arm, and the second core of the active waveguide arm is also coupled with the output port of the first core of the passive waveguide arm.

Abstract: A waveguide structure for optical coupling is provided. The waveguide structure includes a first waveguide embedded in a cladding of a lower refractive index than the first waveguide, a second waveguide of a higher refractive index than the cladding, and an intermediate waveguide. The first waveguide and the second waveguide are physically arranged at the same side of the intermediate waveguide to establish an optical coupling between the first waveguide and the second waveguide through the intermediate waveguide. The first waveguide material has a refractive index value smaller than or equal to 3.

Abstract: In one embodiment, a photonic waveguide comprises a layer of core material and a waveguide core extending through the core material. The core material surrounding the waveguide core is modified to simulate clad material. A method for forming the photonic waveguide is also disclosed herein.

Abstract: The present invention may be a method, a system, and a computer program product. An embodiment of the present invention provides a method for ensuring anonymity of data. The method comprises the following: determining the number of members of each cluster, based on one or more features of leaving of the members of the data; and anonymizing the data in the database, using the determined number.

Abstract: To provide a semiconductor device including a low-loss optical waveguide. The optical waveguide included in the semiconductor device has a core layer covered with first and second clad layers having respectively different refractive indices. A portion of the core layer is covered at a first ratio, that is, a ratio of the first clad layer to the second clad layer and at the same time, a second ratio, that is, a ratio of the second clad layer to the first clad layer. At this time, the first ratio and the second ratio are each a finite value more than 0.

Abstract: Structures that include a waveguide and methods of fabricating a structure that includes a waveguide. A tapered feature composed of a dielectric material is arranged over the waveguide. The tapered feature includes a sidewall that is angled relative to a longitudinal axis of the waveguide.

Abstract: A method for detecting the presence of an analyte (1) in a solution (2) comprising: providing at least a first and a second probes (A, B) different from each other, each probe (A,B) comprising a nanoparticle conjugated with a receptor specific to the analyte (1); contacting the solution (2) suspected of including the analyte (1) with the first and the second probes (A, B) to form a sample solution (3), wherein the sample solution (3) comprises aggregates (4) comprising the analyte (1) combined with the first and the second probes (A, B); illuminating the sample solution (3) with a light source having at least a first and a second exciting wavelengths (?eA, ?eB) different from each other wherein the first and the second wavelength are chosen to get specific optical responses from the first probe (A) and the second probe (B) respectively when illuminated; detecting as a function of time the light scattered by the first probe (A) at a first detection wavelength (?dA) and the light scattered by the second probe (

Abstract: A light converting optical system employing a planar light trapping optical structure illuminated by a source of monochromatic light. The light trapping optical structure includes a photoresponsive layer including semiconductor quantum dots. The photoresponsive layer is configured at a relatively low thickness and located between opposing broad-area surfaces that confine and redistribute light within the light trapping structure and cause multiple transverse propagation of light through the photoresponsive layer to enhance absorption. The light trapping optical structure further incorporates optical elements configured for injecting light into the light trapping structure.

Abstract: Structures for a polarization splitter and methods of forming a polarization splitter. A multi-mode interference region includes a first waveguide and a second waveguide arranged in a stack over the first waveguide. First and second input ports are connected with the multi-mode interference region. First and second output ports are connected with the multi-mode interference region.

Abstract: Various embodiments are directed to a connector for coupling optical signals to a semiconductor device. In one embodiment, the connector includes a connector member having a recessed portion to arrange a plurality of waveguides formed side-by-side in a transverse direction. A backup member is arranged within the recessed portion interposing the plurality of waveguides between the connector member and the backup member. The recessed portion includes a plurality of ridges arranged in a staggered pattern relative to the plurality of waveguides for positioning the plurality of waveguides relative to the connector.

Abstract: Techniques for forming a photonic device that includes a suspended photonic structure suspended over a silicon substrate are described. A sealed cavity is positioned between the silicon substrate and the photonic structure, and one or more regions of dielectric material act to seal the cavity. Additional structure(s) may be formed on top of the dielectric material.

Abstract: A ceramic micro-truss structure. In one embodiment green state polymer micro-truss structure is formed by exposing a photomonomer resin through a mask to collimated light from three or more directions. The green state polymer micro-truss structure is shaped and post-cured to form a cured polymer micro-truss structure. The cured polymer micro-truss structure is pyrolyzed to form a ceramic micro-truss structure, which may subsequently be coated with metal.

Abstract: A transparent display device includes a transmissive light valve panel, a transparent plate and at least one light emitting assembly. The transmissive light valve panel has a display surface. The transparent plate is disposed with respect to the transmissive light valve panel to form an optical space between the transparent plate and the transmissive light valve panel. The at least one light emitting assembly is disposed beside the optical space and adapted to generate light into the optical space. A light pattern of the light emitted from the light emitting assembly and directed to the optical space has at least one maximum peak in an angular range of ±15° with respect to a direction parallel to the display surface of the transmissive light valve panel.

Abstract: Disclosed is a manufacturing method for a stepped imaging directional backlight apparatus which may include a structured optical film and a tapered body. The structured optical film may include multiple optical functions and may be assembled by folding onto the tapered body, reducing cost and complexity of manufacture.

Abstract: A grating device includes an optical material layer; a channel type optical waveguide region provided in the optical material layer; extension regions provided on the outsides of the channel type optical waveguide region, respectively; a Bragg grating provided in the channel type optical waveguide region; and periodic microstructures provided in the extension regions, respectively. The periodic microstructures are provided in 50 percent or larger of a total of areas of the extension regions.

Abstract: The present disclosure relates to a backlight module. The backlight module is configured for use in a transparent display device and comprises: an optical splitter; and a light source arranged at a side of the optical splitter and emitting light towards the optical splitter. The optical splitter is configured to split light emitted from the light source into a first light beam and a second light beam, wherein the first light beam is configured for supplying backlight, and the second light beam is configured for illuminating background behind the optical splitter. The present disclosure also relates to a transparent display device, comprising the above described backlight module; as well as an array substrate and a color film substrate arranged in front of the backlight module.

Abstract: A method of configuring an optical cable comprising a plurality of optical fibers. The method includes cleaving with a laser beam a first end of an optical fiber at a first end of the optical cable. The laser beam has an intensity distribution adapted to cause a burst of light to be generated during cleaving of the optical fiber and the laser beam is adapted to cause at least some of the burst of light to be received into the first end of the optical fiber, for propagation within the optical fiber. Light output from a second end of the optical cable is detected, and the optical fiber from which the light was output is determined. Finally, the optical fiber at the second end of the optical cable from which the light was output is correlated with the optical fiber that was cleaved.

Abstract: By using various anisotropic silicon etching techniques, a silicon substrate layer (1) and an epitaxial buffer layer (2) under the device structure are removed to obtain a monolithic photonic integration of silicon substrate suspended light-emitting diode (LED) with optical waveguide, and an ultra-thin device monolithically integrated with a suspended LED and an optical waveguide is obtained by further using the nitride back thinning etching technique. Therefore, internal loss of the LED is reduced and light emitting efficiency is improved. In the device according to the present disclosure, the light source and the optical waveguide are integrated on the same wafer, which solves the problem of monolithic integration of planar photons, enables the light emitted by the LED to be transmitted along the optical waveguide, addresses the problem of transmission of light in the optical waveguide, and implements the function of transmitting light within a plane.

Abstract: A holographic see-through optical device, a stereoscopic imaging system including the same, and a multimedia head mounted system are provided. The holographic see-through optical device includes a micro display; a relay optical system, which relays an image generated by the micro display; at least one waveguide comprising at least two portions having different thicknesses or different refractive indexes; at least one first holographic optical element, which is arranged at one of the two portions; and at least one second holographic optical element, which is arranged at the other one of the two portions.

Abstract: A phase shifting optical device and method of manufacture is provided. In an embodiment, the phase shifting optical device may include a first arm defining a first arm optical path, a second arm defining a second arm optical path, a beam splitter for splitting an input optical beam into first and second sub-beams for propagating in the first and second arm optical paths, respectively, and a beam combiner for combining the first and second sub-beams propagated in the first and second arm optical paths, respectively, into an output optical beam. The first arm including a carrier modification element to induce a phase shift in the first arm optical path relative to the second arm optical path. A cladding may be provided proximate to the first arm, the cladding having a temperature coefficient of refractive index (dn/dT)cl opposite in sign to a temperature coefficient of refractive index (dn/dT)a of the first arm.

Abstract: The present disclosure provides an integrated optical component array and method of making an integrated optical component array useful for projection devices or other optical devices. The integrated optical component array can be a PBS array fabricated such that the individual PBS cubes having several elements can be assembled in a massively parallel manner and then singulated as individual optical components, and can result in a large reduction in manufacturing cost.

Abstract: A target substance capturing device includes a reflection surface on which a plurality of non-flat portions is arrayed, the reflection surface capturing a target substance, and reflecting irradiated light. The plurality of non-flat portions are arranged in an array, the array includes a plurality of unit arrays in which the plurality of non-flat portions are arranged such that each one center of the non-flat portions superposes a position of a vertex in an M-time symmetrical figure, and the plurality of unit arrays is arranged such that each one center of gravity of the M-time symmetrical figure superposes a position of an intersection of an N-time symmetrical lattice pattern, where M is an integer of two or more, and N is an integer of two or more and different from M.

Abstract: A method for fabricating an optical waveguide crossing structure. The method includes preparing a plate structure including a crossing part array and a guiding part array, each crossing part of the crossing part array being arranged at a gap from a plurality of guiding parts of the guiding part array. The method further includes preparing a waveguide structure including a first waveguide core array, a second waveguide core array and a tank, the tank being formed by removing a crossing region of the first waveguide core array and the second waveguide core array. The method further includes injecting an underfill into the tank. The method further includes depositing the plate structure on the waveguide structure so that the crossing part array and the guiding part array are inserted in the tank. The method further includes curing the underfill.

Abstract: An apparatus includes, an Integrated Circuit (IC), first electrical connections and second electrical connections. The IC is mounted on a substrate and is configured to exchange one or more communication signals with one or more electro-optical transducers, and to exchange one or more control signals with external circuitry. The first electrical connections extend from the IC on a plane parallel to the substrate, and are configured to conduct the communication signals. The second electrical connections extend from the IC on one or more planes not parallel to the substrate, and are configured to conduct the control signals.

Abstract: For multi-mode interference (MMI) couplers that have a plurality of input and output ports, e.g. 4×4, a large number of modes may be supported in the multimode region, e.g. >10, as the width of the MMI core grows larger. In order for MMI couplers to form good images, the supported modes preferably have low modal phase error, which can't be achieved using a conventional single layer design. Accordingly, a multi-mode interference (MMI) coupler comprising an MMI core comprising a plurality of waveguide core strips alternating with a plurality of cladding strips solves the aforementioned problems.

Abstract: An optical waveguide termination includes a light-receiving inlet for receiving light to be terminated, a rib waveguide extending from the inlet, a doped, light-absorbing slab supporting the rib waveguide for absorbing light from the rib waveguide, and a tip at an end of the rib waveguide. The optical waveguide termination exhibits low back-reflection.