Abstract: A suspension board with circuit includes a circuit board containing a metal supporting board, an insulating pattern formed on the metal supporting board, and a conductive pattern formed on the insulating pattern; an optical waveguide disposed on the circuit board; and a positioning portion provided on the circuit board in order to position the optical waveguide with respect to the circuit board.

Abstract: A method for the contactless transmission of at least one differential signal between a transmitter and a receiver given the existence of at least one common-mode noise signal, which has a low frequency in comparison with at least one signal to be transmitted, is provided. The suppression of at least one common-mode noise signal within the receiver a ground reference potential assigned to the receiver is separated into two ground reference potentials decoupled from one another. At least one common-mode noise signal may be suppressed by a filter unit at the input of a receive amplifier of the receiver.

Abstract: This document discusses, among other things, a connector for an optical imaging probe that includes one or more optical fibers communicating light along the catheter. The device may use multiple sections for simpler manufacturing and ease of assembly during a medical procedure. Light energy to and from a distal minimally-invasive portion of the probe is coupled by the connector to external diagnostic or analytical instrumentation through an external instrumentation lead. Certain examples provide a self-aligning two-section optical catheter with beveled ends, which is formed by separating an optical cable assembly. Techniques for improving light coupling include using a lens between instrumentation lead and probe portions. Techniques for improving the mechanical alignment of a multi-optical fiber catheter include using a stop or a guide.

Abstract: A 2-to-1 POF optical coupler, a bi-directional link that employs the coupler, and methods for performing 2-to-1 optical coupling are provided, wherein the 2-to-1 POF optical coupler is configured to provide a carefully-selected amount of cross-sectional overlap at the interface between the end face of a main POF or POF pigtail and the end face of the coupler. The amount of overlap is selected to ensure that optical coupling losses are reduced and optical efficiency is increased in both directions in a bi-directional optical communications links. Consequently, signal integrity is improved, limitations on link length are relaxed, and overall link performance is improved while, at the same time, overall link costs are reduced.

Abstract: An optical apparatus comprises: a waveguide substrate; three planar optical waveguides formed on the substrate, each comprising a transmission core and cladding; a laser positioned to launch its optical output to propagate along the first waveguide; a photodetector positioned to receive an optical signal propagating along the second waveguide; and a lateral splitter core formed on the substrate for (i) transferring a first fraction of laser optical output propagating along the first waveguide to the second waveguide, and (ii) transferring a second fraction of the laser optical output propagating along the first waveguide to the third waveguide.

Abstract: An optical interconnect is provided which may allow flexible high-bandwidth interconnection between chips, eliminate the need for optical alignment between the optoelectrical (OE) die and waveguide during assembly because the OE die is at least partially embedded inside the waveguide (lower cladding layer, upper cladding layer, and core layer), eliminate the need for handling the optical interconnect at OEM, and not impact current substrate and motherboard technology.

Abstract: A waveguide and resonator are formed on a lower cladding of a thermo optic device, each having a formation height that is substantially equal. Thereafter, the formation height of the waveguide is attenuated. In this manner, the aspect ratio as between the waveguide and resonator in an area where the waveguide and resonator front or face one another decreases (in comparison to the prior art) thereby restoring the synchronicity between the waveguide and the grating and allowing higher bandwidth configurations to be used. The waveguide attenuation is achieved by photomasking and etching the waveguide after the resonator and waveguide are formed. In one embodiment the photomasking and etching is performed after deposition of the upper cladding. In another, it is performed before the deposition. Thermo optic devices, thermo optic packages and fiber optic systems having these waveguides are also taught.

Abstract: A multi-chip module (MCM), which includes a three-dimensional (3D) stack of chips that are coupled using optical interconnects, is described. In this MCM, disposed on a first surface of a middle chip in the 3D stack, there are: a first optical coupler, an optical waveguide, which is coupled to the first optical coupler, and a second optical coupler, which is coupled to the optical waveguide. The first optical coupler redirects an optical signal from the optical waveguide to a first direction (which is not in the plane of the first surface), or from the first direction to the optical waveguide. Moreover, the second optical coupler redirects the optical signal from the optical waveguide to a second direction (which is not in the plane of the first surface), or from the second direction to the optical waveguide. Note that an optical path associated with the second direction passes through an opening in a substrate in the middle chip.

Abstract: Optical resonators and optical devices based on optical resonators that implement diffractive couplers for coupling light with the optical resonators.

Abstract: In one aspect, an illumination structure includes a substantially non-fiber waveguide, which itself includes a discrete in-coupling region for receiving light, a discrete propagation region for propagating light, and a discrete out-coupling region for emitting light.

Abstract: An integrated fiber optic switch based on the magneto-optic effect of magnetic materials suitable for optical fiber networks is presented. The switch is based on the Faraday Effect exhibited by magneto-optic materials. The all-fiber magneto-optic switch has a beam splitter at the input that splits an incoming signal into orthogonal polarized paths. Each path has at least one magneto-optic Faraday rotator (MOFR) controlled by a field. When the field is present, the polarization of the optical beam changes, thereby turning the switch on or off. A beam coupler couples the orthogonal polarized paths at the output of the all-fiber magneto-optic switch. The switch is constructed in the Mach-Zehnder configuration, utilizing two 3 dB couplers, isolators and MOFRs fabricated on silicon-on-insulator.

Abstract: Passive optical components may be used to tap the optical power, e.g., from fibers of a wavelength switch system. The passive optical components are realized by a standard photonics light-wave circuit (PLC) integrated to the fiber collimator array of the wavelength switch system. The PLC includes multiple waveguide paths that optically couple optical signals from one or more fiber ports to one or more corresponding free space optical component ports. Optical signals traveling through these waveguide paths are tapped by one or more optical taps and coupled to one or more corresponding tap ports. Each optical tap is located such that an optical signal is tapped after it is coupled into one of the waveguide paths.

Abstract: An optical element includes a first and a second layer in a first and a second region respectively in light propagating direction; a first and a second core layer above the first and the second layers respectively; a top layer above the first and the second core layer, the first and the second core layer extend in succession in the light propagating direction, a first projecting section exposes a side of the first core layer is in the first region, a second projecting section exposes at least part of a side of the second core layer is in the second region, a bottom section of the first projecting section is positioned below the bottom surface of the first core layer and the second core layer, and a bottom section of the second projecting section is positioned higher than the bottom section of the first projecting section.

Abstract: When a waveguide of second signal light outputted from a first optical coupler intersects a waveguide of first local light outputted from a second optical coupler, a waveguide of a first signal light outputted from the first optical coupler and a waveguide of a second local light outputted from the second optical coupler are each provided with a loss compensation intersecting waveguide that compensates for loss that occurs when the waveguide of the second signal light outputted from the first optical coupler intersects the waveguide of the first local light outputted from the second optical coupler.

Abstract: A self-written branched optical waveguide is formed. A laser beam 2 from a laser source (not shown) is focused with a lens 3 onto the face of incidence 10 of an optical fiber 1. The laser beam of an LP11 mode was emitted from the face of emergence 11, and “bimodal” light intensity peaks were arranged in the horizontal direction (1.A). A slide glass 4 coated with a photocurable resin gel 5 was placed horizontally (1.B). A single linear cured material 61 was formed as the LP11-mode laser beam was emitted from the face of emergence 11 of the optical fiber 1 (1.C). A branch portion 62 was then formed at a distance L from the face of emergence 11 of the optical fiber 1, which was followed by the growth of two cylindrical cured materials 63a and 63b. The two cylindrical cured materials 63a and 63b were linear branches, and formed an angle of about four degrees. An optical waveguide 60 thus formed was composed of cured materials 61, 62, 63a, and 63b (1.D).

Abstract: Various embodiments of the present invention are directed to optical interconnects. In one embodiment of the present invention, an optical interconnect comprises a laser configured to output an optical signal and a laser-diode driver electronically coupled to the laser. The laser-diode driver induces the laser to output the optical signal in response to an electrical signal received by the laser-diode driver. The optical interconnect includes a diffractive optical element and a plurality of photodetectors. The optical interconnect is positioned to receive the optical signal and configured to split the optical signal into a plurality of optical signals, and each photodetector converts one of the plurality of optical signals into an electrical signal that is output on a separate signal line.

Abstract: An optical coupling device for coupling an optical signal propagating in an optical fiber or space to an optical waveguide includes a lower cladding layer formed on a substrate, an optical waveguide formed on the lower cladding layer such that the tip of the optical waveguide points to an end portion of the lower cladding layer, and having a tapered distal end portion, and an upper cladding layer continuously formed on the lower cladding layer and on the distal end portion of the optical waveguide from the end portion of the lower cladding layer to the distal end portion of the optical waveguide, and having a refractive index higher than that of the lower cladding layer. The upper cladding layer draws light having entered the end portion of the lower cladding layer toward the upper cladding layer, and couples the light to the distal end portion of the optical waveguide.

Abstract: A microoptical component for coupling a laser light to microresonators includes at least two microresonators, each having a form of an axially symmetric body disposed on a pedestal, and at least one waveguide for the laser light. The at least two microresonators are disposed on a first substrate having first side walls. The at least one waveguide is disposed on a second substrate having second side walls. The first side walls and the second side walls are fixedly joined.

Abstract: The present invention provides a mixed analog and digital chip-scale reconfigurable WDM network. The network suitably includes a router that enables rapidly configurable wavelength selective routers of fiber optic data. The router suitably incorporates photonic wavelength selective optical add/drop filters and multiplexers.

Abstract: An optical waveguide device that is smaller in size and has higher impact resistance. The optical waveguide device (1) has a V-groove (14) formed in a groove forming surface (SF) at an end of a base board (10) where an optical waveguide section (11) is formed. An optical fiber element (22) is embedded by an adhesive layer (13) and connected to the base board (10) with an end of the optical fiber element (22) fitted in the V-groove (14).

Abstract: A single-mode, etched facet distributed Bragg reflector laser includes an AlGaInAs/InP laser cavity, a front mirror stack with multiple Fabry-Perot elements, a rear DBR reflector, and a rear detector. The front mirror stack elements and the rear reflector elements include input and output etched facets, and the laser cavity is an etched ridge cavity, all formed from an epitaxial wafer by a two-step lithography and CAIBE process.

Abstract: An apparatus for establishing an optical circuit path spanning a discontinuity in an optical channel supported by a first cable oriented about a first axis on a first side of the discontinuity and supported by a second cable section oriented about a second axis on a second side of the discontinuity includes: (a) a first coupling member coupled with the optical channel on the first side; (b) a first supporting member fixed with the first coupling member in an installed orientation in a clamping relation with the first cable section; (c) a second coupling member coupled with the optical channel on the second side; (d) a second supporting member fixed with the second coupling member in an installed orientation clamped with the second cable section; and (e) a connecting member optically coupling the first coupling member with the second coupling member to establish the optical circuit path.

Abstract: An exemplary thin film transistor array substrate (200) includes a transparent substrate (261), a plurality of gate lines (201) and a plurality of data lines (202) formed at the transparent substrate, the gate lines and the data lines crossing each other thereby defining a plurality of pixel regions (230). Each of the pixel regions includes a storage capacitor (220). The storage capacitor includes a first capacitor and a second capacitor aligned along a direction generally perpendicular to the transparent substrate, and the first capacitor and the second capacitor are electrically connected in parallel.

Abstract: A rubber member optically connects (a) an optical transmission medium or an optical component and (b) another optical transmission medium or another optical component by intervening between the (a) and the (b). An adhesive connecting member comprises a rubber member having a refractive index of 1.35 to 1.55 and an adhesive having a refractive index of 1.35 to 1.55.

Abstract: A rod lens is used for fitting in an endoscopes. The rod lens has a rod-shaped body which is made at least in a section of a flexible, transparent solid piece of plastic material.

Abstract: This document discusses, among other things, a connector for an optical imaging probe that includes one or more optical fibers communicating light along the catheter. The device may use multiple sections for simpler manufacturing and ease of assembly during a medical procedure. Light energy to and from a distal minimally-invasive portion of the probe is coupled by the connector to external diagnostic or analytical instrumentation through an external instrumentation lead. Certain examples provide a self-aligning two-section optical catheter with beveled ends, which is formed by separating an optical cable assembly. Techniques for improving light coupling include using a lens between instrumentation lead and probe portions. Techniques for improving the mechanical alignment of a multi-optical fiber catheter include using a stop or a guide.

Abstract: A system is provided for characterizing optical fibers carrying signal traffic. The system includes a transmitter, a variable optical attenuator (VOA), a receiver, and a computing device. The transmitter propagates an optical test signal along a channel of a fiber pathway. The VOA adjusts the attenuation of the optical test signal from an initial, greater attenuation to a subsequent, lesser attenuation. At the same time, the computing device monitors at least one other channel of the fiber pathway and identifies effects upon the other channel(s) from the optical test signal. The computing device may communicate with the VOA and with other components of the fiber pathway to direct adjustment of the signal strength. A maximum optical test signal strength may thus be achieved that does not negatively affect signal traffic on the other channels, and the fiber pathway may subsequently be tested using the achieved maximum optical test signal strength.

Abstract: An optical rotating data transmission device comprises a first collimator arrangement for coupling-on first optical waveguides, a second collimator arrangement for coupling-on second optical waveguides, which is supported to be rotatable relative to the first collimator arrangement about a rotation axis, and a derotating element such as a Dove prism in a light path between the collimator arrangements. At least one collimator arrangement comprises a deflecting element which deflects light entering the device from optical waveguides positioned at an angle to the direction of the rotation axis to travel along the direction of the rotation axis, or deflects light traveling along the direction of the rotation axis to exit the device at an angle to the rotation axis towards optical waveguides.

Abstract: An integrated optical-amplification module includes a housing member, a first input optical terminal configured to receive an optical signal, a second input, optical terminal that can receive a pump light, and an output optical terminal that can output a combined optical signal comprising at least a portion of the optical signal and a portion of the pump light. The integrated optical-amplification module also includes an optical combiner fixedly installed relative to the housing member. The optical combiner can receive the pump light and the optical signal and an optical prism fixedly installed relative to the housing member. The optical combiner can merge the pump light and the optical signal to form the combined optical signal. The optical prism can direct at least a portion of the optical signal through free space to the optical combiner.

Abstract: An optical fiber mounting waveguide device and a method for fabricating the same, which provide a low optical connection loss and a high productivity. An under cladding layer (3u), a core (4), and an over cladding layer (3o) are sequentially formed on a substrate (8) to constitute an optical fiber mounting waveguide device (1). An optical fiber mounting groove (2) for mounting an optical fiber (6) is formed on the optical fiber mounting waveguide device (1). An end surface (3a) of the over cladding layer (3o) faces to the optical fiber mounting groove (2). The core (4) and the under cladding layer (3u) are projected toward the optical fiber mounting groove (2) with respect to the end surface (3a) of the over cladding layer (3o).

Abstract: A light emitting device, in which an encapsulation resin is disposed at a space confined between an optical member and a mounting substrate. This encapsulation resin is possibly made free from a void-generation therein. In this light emitting device, the optical member can be precisely positioned. An electrode disposed outside a color conversion member is possibly free from an improper solder connection. A ring gate is formed on the top surface of the mounting substrate outside of the optical member, and acts to position the color conversion member. The ring gate acts to prevent an overflowing liquid encapsulation resin from flowing to the electrode provided. The ring gate is provided with a plurality of centering projections which are spaced circumferentially along its inner circumference to position the color conversion member.

Abstract: An optical assembly is formed with a silicon substrate having a first surface and a second surface confronting the first surface. A reflective coating is formed over the first surface. Multiple diffraction gratings are formed integrally within the second surface of the silicon substrate. An optical absorber is formed over the second surface between the diffraction gratings.

Abstract: An optical connector according to the present invention comprises a ferrule and a V-groove board connected to the ferrule, wherein a first optical fiber and a second optical fiber being butt jointed in a V-groove formed in the V-groove board so as to be interconnected; the second optical fiber is connected to the first optical fiber through a refractive index matching material of cross-link curing type applied to an end surface on the V-groove board side of the first optical fiber; and spaces are provided in the V-groove so as to relax stress loaded on the refractive index matching material of cross-link curing type.

Abstract: Described herein are optical devices including resonant cavity structures. In one embodiment, an optical fiber includes: (1) an elongated core including an outer surface; (2) an inner reflector disposed adjacent to the outer surface of the core and extending substantially along a length of the core; (3) an outer reflector spaced apart from the inner reflector and extending substantially along the length of the core; and (4) an emission layer disposed between the outer reflector and the inner reflector and extending substantially along the length of the core, the emission layer configured to emit radiation that is guided within the optical fiber.

Abstract: An example photodetector includes a waveguide structure having an active waveguide comprising an absorber for converting photons conveying an optical signal into charge carriers conveying a corresponding electrical signal; a carrier collection layer for transporting the charge carriers conveying the electrical signal; and a secondary waveguide immediately adjacent to the carrier collection layer, for receiving the photons to be detected, and which is evanescently coupled to the active waveguide.

Abstract: An optical fiber includes a cladding, a first core, and a second core. At least one of the first core and the second core is hollow and is substantially surrounded by the cladding. At least a portion of the first core is generally parallel to and spaced from at least a portion of the second core. The optical fiber includes a defect substantially surrounded by the cladding, the defect increasing a coupling coefficient between the first core and the second core.

Abstract: A method comprises: forming an optical device on a device substrate; forming a first optical waveguide on the device or device substrate; forming a second, structurally discrete optical waveguide on a structurally discrete waveguide substrate; and assembling the optical device, first waveguide, or device substrate with the second waveguide or waveguide substrate. The device and first waveguide are arranged for transferring an optical signal between the device and the first waveguide. Upon assembly the first and second waveguides are positioned between the device and waveguide substrates and are relatively positioned for transferring the optical signal therebetween via optical transverse coupling. The first or second optical waveguide is arranged for transferring the optical signal therebetween via substantially adiabatic optical transverse coupling with the first and second waveguides so positioned.

Abstract: An optical assembly includes a waveguide assembly and an optical coupling element. The waveguide assembly includes a core, a cladding portion, and, preferably, at least two waveguide core fiducials, the at least two waveguide core fiducials and the core being lithographically formed substantially simultaneously in a substantially coplanar layer. The core and the at least two waveguide core fiducials are formed in a predetermined relationship with the cladding portion. The optical coupling element (for example, a lens array or mechanical transfer (MT) ferrule), includes an optical element and, preferably, at least two alignment features associated with the optical element, the at least two alignment features being mated with the at least two waveguide core fiducials to accurately position the optical element with respect to the core in an X-Y plane. A method of alignment is also provided.

Abstract: The present invention provides a hybrid coupling structure of a short range surface plasmon polariton and a conventional dielectric waveguide, including a dielectric substrate layer, a dielectric waveguide layer positioned on the said dielectric substrate layer, a coupling matching layer positioned on the said dielectric waveguide layer and a short range surface plasmon waveguide portion, formed on the said coupling matching layer, for conducting the short range surface plasmon polariton. The present invention also provides a coupling structure of a long range surface plasmon polariton and a dielectric waveguide, including a dielectric substrate layer, a dielectric waveguide layer, a coupling matching layer and a long range surface plasmon waveguide portion upward from below respectively.

Abstract: Provided are a waveguide structure and an arrayed waveguide grating structure. The arrayed waveguide grating structure includes an input star coupler, an output star coupler, and a plurality of arrayed waveguides optically connecting the input star coupler and the output star coupler. Each of the arrayed waveguides includes at least one section having a high confinement factor and at least two sections having a relatively low confinement factor. The sections of the arrayed waveguides having a high confinement factor have the same structure.

Abstract: An optical transmission module has a light-emitting element, a light-receiving element, and an optical path for optically coupling the light-emitting element and the light-receiving element, and transmitting a optical signal. The optical path has a core part, a clad part surrounding the core part, and a support board for supporting the optical path itself and the light-receiving element. A resin part formed of resin having a refractive index higher than air outside the optical path is arranged at a part of a surface area of the clad part along an optical transmission direction to which optical signals are transmitted. The resin part has an inclined surface in which the surface on the opposite side of the clad part is tilted relative to the optical transmission direction. The inclined surface forms an acute angle with the surface of the clad part at the opposite side of the light-receiving element in the resin part.

Abstract: A linear member (10) comprises a first layer (30) and a second layer (40), the second layer being arranged around the first layer. The second layer comprises a series of annular grooves (60). The material for the second layer is substantially stronger than the material for the first layer.

Abstract: To prevent the property of an optical filter from being changed even if there is a change in a gap of directional couplers generated due to variations in manufacturing conditions so as to improve the yield. A tunable laser device includes a PLC and an SOA. The PLC includes: optical waveguides; an optical filter; a loop mirror; thin-film heaters; and asymmetrical MZIs. Optical coupling parts within the PLC are formed with the asymmetrical MZIs, so that there is no change generated in the property of the optical filter even if there is a change generated in a gap of the directional couplers due to variations in the manufacturing conditions. Therefore, the yield can be improved.

Abstract: Substrate-guided relays that employ light guiding substrates to relay images from sources to viewers in optical display systems. The substrate-guided relays are comprised of an input coupler, an intermediate substrate, and an output coupler. In some embodiments, the output coupler is formed in a separate substrate that is coupled to the intermediate substrate. The output coupler may be placed in front of or behind the intermediate substrate, and may employ two or more partially reflective surfaces to couple light from the coupler. In some embodiments, the input coupler is coupled to the intermediate substrate in a manner that the optical axis of the input coupler intersects the optical axis of the intermediate substrate at a non-perpendicular angle.

Abstract: In an optical multiplexing/demultiplexing device are arranged in parallel and disposed on a substrate. The optical multiplexing/demultiplexing device is disposed with three or more Mach-Zehnder interferometers between the first and second optical input/output ports. The optical multiplexing/demultiplexing device divides, by wavelength, multiplexed light comprising first light and second light whose wavelengths are different and which are input to one of the first optical input/output ports and outputs the multiplexed light from each of the second optical input/output ports. The absolute value of an optical path difference ?L of each the Mach-Zehnder interferometers is constant. The optical multiplexing/demultiplexing device includes one or more each of a pair of two successive Mach-Zehnder interferometers where the sum of their optical path differences becomes +2?L or ?2?L and a pair of two successive Mach-Zehnder interferometers where the sum of their optical path differences becomes 0.

Abstract: The present invention provides a fiber Bragg grating element which is simply configured and capable of obtaining a high cut-off amount exceeding 40 dB in a wide range. A fiber Bragg grating element of the present invention has a plurality of gratings formed in an optical waveguide having a core and a cladding around the core thereby to perform high rejection filtering on an input optical signal over a desired bandwidth˜ the gratings being formed with a grating pitch between adjacent two of the gratings increasing toward a center in a longitudinal direction of the optical waveguide.

Abstract: A method and apparatus for monitoring one or more environmental parameters using interferometric sensor(s), a cross-correlator, a two-dimensional photosensitive array and optical focusing means are described. The method and apparatus allows for near simultaneous monitoring of the parameter(s) of interest.

Abstract: An apparatus and method are disclosed for decreasing the spectral bandwidth of a semiconductor laser, such as a vertical cavity surface emitting laser.

Abstract: A system and method of asymmetrical fiber or waveguide spacing comprising, in general, an asymmetrical fiber concentrator array (FCA), wherein an offset in the front face spacing of the output waveguides relative to the input waveguides functions to reduce or eliminate the introduction of static back reflection, and static in-to-in crosstalk into a fiber by an optical switch, but does not impose the cost, complexity, and insertion loss penalties brought about by additional components.

Abstract: An optical apparatus comprises: a waveguide substrate; three planar optical waveguides formed on the substrate, each comprising a transmission core and cladding; a laser positioned to launch its optical output to propagate along the first waveguide; a photodetector positioned to receive an optical signal propagating along the second waveguide; and a lateral splitter core formed on the substrate for (i) transferring a first fraction of laser optical output propagating along the first waveguide to the second waveguide, and (ii) transferring a second fraction of the laser optical output propagating along the first waveguide to the third waveguide.