Abstract: A light source has a resonant laser cavity with an optical grating and a waveguide that has a longitudinal axis. A portion of the longitudinal axis extends through the optical grating and serves as a grating axis. The laser cavity is configured to generate a laser signal that exits the laser cavity through the optical grating. The optical grating includes multiple perturbation structures that each causes a perturbation in an effective refractive index of the waveguide. The perturbation structures are staggered on the waveguide such that the perturbation structures that are adjacent to one another in a longitudinal direction are spaced apart in a transverse direction. The longitudinal direction is a direction parallel to the grating axis and the transverse direction is a direction transverse to the longitudinal direction.

Abstract: Laser hazard at disconnection can be prevented with a simple structure. A tubular connector exterior, and a block that is incorporated on one end side of the connector exterior and on which a light emission portion or a light incident portion is mounted toward the other end side are provided. The light emission portion or the light incident portion is mounted on the block so that the optical axis direction thereof is tilted relative to the longitudinal direction of the connector exterior. The light emission portion is a lens through which light output from a light transmission path is collimated and emitted. At least part of the collimated light emitted through the lens is incident on a light diffusion portion provided inside the connector exterior.

Abstract: An optical module structure includes a main substrate, an interposer substrate electrically connected to the main substrate via a first protruding electrode, a first communication LSI electrically connected to the interposer substrate via a second protruding electrode, an IC element electrically connected to the interposer substrate via a lateral-surface connection terminal of the interposer substrate and via a third protruding electrode, an Si bench substrate electrically connected to the IC element via a fourth protruding electrode and via a lateral-surface connection terminal of the Si bench substrate, an optical element electrically connected to the Si bench substrate via a fifth protruding electrode, and an optical fiber optically connected via an optical waveguide formed on the Si bench substrate.

Abstract: An optical fiber adapter according to the present disclosure includes a main body, a first shutter member, a second shutter member, an inner housing, a first elastic member and a second elastic member. The first elastic member includes a first base portion, a first driving portion and a first connecting portion. The first connecting portion connects the first base portion with the first driving portion. The second shutter member includes a second base portion, a second driving portion and a second connecting portion. The second connecting portion connects the second base portion with the second driving portion. The inner housing is positioned within the main body through the first opening. The first shutter member is attached to and is driven to move by the first driving portion. The second shutter member is attached to and is driven to move by the second driving portion.

Abstract: A coating is applied on a first end face of an optical component which includes a cladding and a core for guiding light. The first end face has a cladding front face and a core front face. The core front face is covered with a mask, the coating is applied onto the first end face, the coating s removed from the masked core front face, and for covering the core front face, a lacquer layer made of a photo resist is applied onto the first end face. The photo resist is exposed to light from the rear side only in the region of one of the front faces such that light is input on the second end face of the component only in one of the two regions, and the lacquer layer is subsequently selectively removed.

Abstract: An optical wiring substrate includes an insulation layer including a resin, a first conductor layer formed on the insulation layer and including a metal, the first conductor layer including an inclined surface that is inclined relative to an optical axis of an optical fiber. The insulation layer further includes an end surface that faces a cladding of the optical fiber. The inclined surface of the first conductor layer is formed at a position that faces a core of the optical fiber.

Abstract: A ferrule of the present invention includes a positioning mechanism for positioning an optical fiber, and a recess having at least a first inner wall for allowing a front end of the optical fiber portion positioned by the positioning mechanism to protrude, and a second inner wall opposite to the first inner wall. A distance between the first inner wall and the second inner wall is less than or equal to four times the outer diameter of the optical fiber. Adhesive is filled into the recess and cured in a state in which the optical fiber protrudes from the first inner wall and substantially contacts the second inner wall to fix the optical fiber.

Abstract: An optical interposer comprising: (a) a crystalline substrate having a top planar surface and a crystalline plane angle; (b) a groove defined in the top planar surface and extending from an edge of the substrate to a terminal end, the groove having side walls and a first facet at the terminal end, the facet having a first angle relative to the top planar surface, the first angle being about the crystalline plane angle, the first angle having a delta from 45°; (c) a reflective coating on the first facet; and (d) an optical conduit having an optical axis and an end face optically coupled with the first facet, the end face having a second angle with respect to the optical axis such that the angle of refraction at the end face compensates for the delta such that the end face and the first facet cooperate to bend light about 90°.

Abstract: An optical module include a first substrate including a first surface over which a light emitting element is mounted, an optical waveguide provided with a second surface of the first substrate, a mirror configured to reflect output light of the light emitting element to the optical waveguide, a second substrate, and a light receiving element configured to receive leakage light produced when the output light from the light emitting element is transmitted through the mirror disposed in the optical waveguide, the light receiving element being mounted over the second substrate different from the first substrate.

Abstract: An optical receiver for a quantum key distribution system comprises a plurality of optical components mounted or formed in a substrate and optically coupled by one or more hollow core waveguides formed in the substrate.

Abstract: The invention relates to laser cutting, using multiple laser beams directed to a processing region. At least one first laser beam (2) is coupled into the work piece (1) material to generate a melt (5) and to form a keyhole (3). At least one second beam (6) is guided onto selected surface regions (7) of the melt (5). The laser energy is provided to the processing region as individual beams that may be conditioned independently. The invention has the advantage that arbitrary energy distributions can be arranged in the processing region as determined according to the requirements of the laser cutting process, rather than being limited by an inappropriate beam shape of a single high power laser beam.

Abstract: In a waveguide device, unnecessary optical power is appropriately terminated. According to an embodiment of the present invention, the waveguide device has a termination structure filled with a light blocking material to terminate light from a waveguide end. In the termination structure, a cladding and a core are removed to form a groove on an optical waveguide. The groove is filled with a material (light blocking material) that attenuates the intensity of light. Thus, light input to the termination structure is attenuated by the light blocking material, suppressing crosstalk which possibly effects on other optical devices. Thus, such a termination structure can restrain crosstalk occurred in optical devices integrated in the same substrate and can also suppress crosstalk which possibly effects on any other optical device connected directly to the substrate.

Abstract: Embodiments of optofluidic devices or methods according to the application can provide on-chip, label-free, massively parallel analysis of analytes. An embodiment of the optofluidic device can comprise a microresonator, a waveguide optically coupled to the microresonator, and a fluidic channel that exposes an analyte to an evanescent field from the microresonator, wherein the light signal has a linewidth lesser than the width of at least one resonance of the light signal propagating in the microresonator. The light signal can be tuned across a spectrum of light wavelengths, wherein the spectrum of wavelengths includes one or more wavelengths defining the at least one resonance in the microresonator. The light transmission through the waveguide over the spectrum of wavelengths of the input light can be detected, and an absorption spectrum of the analyte can be determined.

Abstract: There are provided an optical measurement probe capable of obtaining a more stable measurement result, and an optical measurement device provided with the same. An incidence surface of an optical window to be used in a high temperature environment is covered by a deposited film. The optical window is formed of sapphire, and the deposited film is formed from SiO2. Adhesion of dirt to the incidence surface, and an influence, on a measurement result, of the adhesion of dirt on the incidence surface can thereby be prevented, and a more stable measurement result can be obtained.

Abstract: An optical board includes a plate-shaped resin base material including a slit-shaped optical fiber housing portion formed thereon, a metal layer formed on a surface of the based material, and a reflective layer for reflecting light propagating in an optical fiber housed in the optical fiber housing portion. The base material further includes an inclined surface inclined with respect to the surface of the base material at a terminal end of the optical fiber housing portion. The reflective layer is formed over an end face of the metal layer and the inclined surface, the end face forming a flat surface continuously with the inclined surface.

Abstract: An optical delivery apparatus is disclosed including: an optical fiber extending between a distal end having a distal end face and a proximal end having a proximal end face, an optical element positioned to receive the light emitted from the distal end face and direct the light to an illumination region; and a non-metallic housing containing the optical fiber and the optical element and maintaining the relative position of the optical fiber and the optical element.

Abstract: A method of forming an optical fiber tip, the method including, roughening at least part of an end portion of the optical fiber; and, etching the roughed end portion to thereby form an optical fiber tip.

Abstract: The invention relates to a monofrequency optical filter, including reflective elements which are formed on one surface of a dielectric support layer and which define at least one periodic array of parallel grooves passing across same. The periodicity, height, and width of said periodic groove array are selected so as to form a structure, the wavelength of which can be selected from within a predetermined range of wavelengths. According to the invention, the thickness and refractive index of the support layer are selected so that said layer forms a half-wave plate for a wavelength of the predetermined wavelength range. The filter, when in contact with the surface of the support layer opposite the surface on which the groove array is formed, includes a medium, the refractive index of which is less than that of the support layer so as to obtain a guided mode that resonates in the support layer.

Abstract: In one embodiment, an apparatus may include an optical fiber that may have a surface non-normal to a longitudinal axis of a distal end portion of the optical fiber. The surface may define a portion of an interface configured to redirect electromagnetic radiation propagated from within the optical fiber and incident on the interface to a direction offset from the longitudinal axis. The apparatus may also include a doped silica cap that may be fused to the optical fiber such that the surface of the optical fiber may be disposed within a cavity defined by the doped silica cap.

Abstract: In one embodiment, an apparatus may include an optical fiber that may have a surface non-normal to a longitudinal axis of a distal end portion of the optical fiber. The surface may define a portion of an interface configured to redirect electromagnetic radiation propagated from within the optical fiber and incident on the interface to a direction offset from the longitudinal axis. The apparatus may also include a doped silica cap that may be fused to the optical fiber such that the surface of the optical fiber may be disposed within a cavity defined by the doped silica cap.

Abstract: Embodiments include an apparatus including an optical fiber having a proximal end and a distal end. The distal end of the optical fiber has a surface configured to emit energy transverse to a longitudinal axis of the optical fiber. The apparatus also includes a tube including a channel, and the distal end of the optical fiber is disposed in the channel of the tube. The apparatus further includes an element disposed at a distal end of the tube such that a pocket is formed in the channel of the tube between the element and the distal end of the optical fiber.

Abstract: An optical fiber coupler includes a clad optical fiber core having a coupling window formed therein. A laser source is joined to emit light into the core through the coupling window. The core has an output coupler for partially reflecting a portion of light and transmitting a portion as output. A Bragg grating is formed in the core having a pitch and being positioned to reflect light from said laser source toward the output coupler. The pitch is variable in response to a temperature change. A thermal control device is joined to the core for adjusting its temperature and the Bragg grating pitch. In other embodiments a mode convertor is provided to reduce the output modes to selected modes.

Abstract: Exemplary apparatus for obtaining information for a structure can be provided. For example, the exemplary apparatus can include at least one first optical fiber arrangement which is configured to transceive at least one first electro-magnetic radiation, and can include at least one fiber. The exemplary apparatus can also include at least one second focusing arrangement in optical communication with the optical fiber arrangement. The second arrangement can include a ball lens, and be configured to focus and provide there through the first electro-magnetic radiation to generate the focused electro-magnetic radiation. Further, the exemplary apparatus can include at least at least one dispersive third arrangement which can receive a particular radiation (e.g., the first electro-magnetic radiation(s) and/or the focused electro-magnetic radiation), and forward a dispersed radiation thereof to at least one section of the structure.

Abstract: Embodiments include an apparatus including an optical fiber having a proximal end and a distal end. The distal end of the optical fiber has a surface configured to emit energy transverse to a longitudinal axis of the optical fiber. The apparatus also includes a tube including a channel, and the distal end of the optical fiber is disposed in the channel of the tube. The apparatus further includes an element disposed at a distal end of the tube such that a pocket is formed in the channel of the tube between the element and the distal end of the optical fiber.

Abstract: Disclosed is an optical module which improves optical coupling efficiency either when configured to receive an optical signal from an optical fiber with a light receiving element or when configured to receive an optical signal from a light emitting element with an optical fiber. The optical module includes: a substrate (1) having in the surface thereof a first groove (1a) and a second groove (1b) formed, with this second groove (1b) being configured to have a substantially V-shaped cross section formed deeper than the first groove and being formed in continuation from the first groove; and an internal waveguide (16) provided within the first groove (1a) of the substrate (1).

Abstract: An optical waveguide device which is free from interference with an optical path between a light emitting element and an optical waveguide thereof, and to provide a method of manufacturing the optical waveguide device. A light emitting element (5) is provided on an upper surface of a first under-cladding layer (21), and a second under-cladding layer (22) is provided on the upper surface of the first under-cladding layer (21), covering the light emitting element (5). A core 3 which receives light emitted from the light emitting element (5) through the second under-cladding layer (22) is provided on an upper surface of the second under-cladding layer (22). The core (3) is located in a position such that the light emitted from the light emitting element (5) is incident on the core (3).

Abstract: Embodiments include an apparatus including an optical fiber having a proximal end and a distal end. The distal end of the optical fiber has a surface configured to emit energy transverse to a longitudinal axis of the optical fiber. The apparatus also includes a tube including a channel, and the distal end of the optical fiber is disposed in the channel of the tube. The apparatus further includes an element disposed at a distal end of the tube such that a pocket is formed in the channel of the tube between the element and the distal end of the optical fiber.

Abstract: The invention relates to a method for terminating optical fiber bundles, wherein the fiber bundle is inserted into a sleeve which is filled with adhesive.

Abstract: The present disclosure is a system for the protection of a fiber within a laser system. The system has a water-cooled housing supporting a termination block, which is operative to shield a protective layer of a delivery fiber from back-reflected beams of light. The termination block is manufactured from quartz and is frustconical in configuration and fuseable to the delivery fiber. The delivery fiber has a polymeric protective layer with an acceptance end and a delivery end, and passes through a washer contained within the housing; the washer has a dielectric reflective coating. The system has at least one terminal block connector which further comprises a cone termination block, a reflector, and a set of light guards. The cone termination block is spliced to an output end of the delivery fiber and produces an angle ? so as to reduce propagation of back-reflected light. The reflector is positioned so as to block additional back-reflected light from the protective layer of the delivery fiber.

Abstract: There is provided a photoelectric conversion module in which an optical device and an optical waveguide are arrayed in a horizontal direction, thereby improving the optical coupling efficiency and therefore, reducing light loss.

Abstract: An optical fiber connector includes a fiber alignment body including a continuous optical fiber guide channel extending therethrough. The continuous optical fiber guide channel has a lead-in channel portion, a lead-out channel portion and a turn portion that connects the lead-in channel portion and the lead-out channel portion. The fiber alignment body has a reflective surface formed of metal that receives light traveling from an optical fiber located within the lead-in channel portion of the continuous optical fiber channel and reflects the light into the lead-out channel portion of the continuous optical fiber channel.

Abstract: A liquid crystal (LC) display panel including a lower substrate with pixel structures, an upper substrate, and an LC layer is provided. Each of the pixel structures includes a transistor and a pixel electrode. The pixel electrode includes first and second pixel electrodes insulated from each other, respectively including a first pattern and a second pattern that different and complementary to each other. Each of the first pixel electrode and the second pixel electrode has at least a trunk with a width smaller than or equal to 10 microns and a plurality of branches. The LC layer is positioned between the upper and the lower substrates and includes a plurality of LC molecules and a plurality of polymers, which are formed on surfaces of at least one of the upper and the lower substrates to cause the plurality of LC molecules to have a pretilt angle.

Abstract: An optical fiber has an incident end on which light is incident, an emitting end from which the light is emitted, and an aperture provided in a core located at or near the emitting end. The aperture is formed by irradiating the core with an ultrashort pulsed laser beam having pulse widths of 10?15 seconds to 10?11 seconds.

Abstract: An optical waveguide device which is free from interference with an optical path between a light emitting element and an optical waveguide thereof, and to provide a method of manufacturing the optical waveguide device. A light emitting element (5) is provided on an upper surface of a first under-cladding layer (21), and a second under-cladding layer (22) is provided on the upper surface of the first under-cladding layer (21), covering the light emitting element (5). A core 3 which receives light emitted from the light emitting element (5) through the second under-cladding layer (22) is provided on an upper surface of the second under-cladding layer (22). The core (3) is located in a position such that the light emitted from the light emitting element (5) is incident on the core (3).

Abstract: Excess optical power in a waveguide device is appropriately terminated. According to one embodiment of the present invention, the waveguide device comprises a termination structure filled with a light blocking material for terminating light from the end section of a waveguide. This termination structure can be formed by forming a groove on an optical waveguide by removing the clad and core, and filling the inside of that groove with a material attenuating the intensity of the light (light blocking material). In this manner, light that enters into the termination structure is attenuated by the light blocking material, and influence on other optical devices as a crosstalk component can be suppressed. With such termination structure, not only the influence on optical devices integrated on the same substrate, but also the influence on other optical devices directly connected to that substrate can be suppressed.

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: An optical coupler module includes a semiconductor substrate disposed on the print circuit board; a reflecting trench structure formed on the semiconductor substrate; a reflector formed on a slant surface of the reflecting trench structure; a strip trench structure formed on the semiconductor substrate and connecting with the reflecting trench structure; a thin film disposed on the above-mentioned structure. The optical coupler module further includes a signal conversion unit disposed on the semiconductor substrate and the position of the signal conversion unit corresponds to the reflector; and an optical waveguide structure formed in the trench structures. The optical signal from the signal conversion unit is reflected by the reflector and then transmitted in the optical waveguide structure, or in a reverse direction to reach the signal conversion unit.

Abstract: A single optical fiber having a distal end is optically coupled to the laser and distilling terminated with an axicon lens optically coupled to the single optical fiber to form a microscopic distal tip to provide a spatially shaped elongated laser focused spot for microprocessing and/or microdissection of a microscale object. A pulsed or continuous laser beam or superposition of pulsed and continuous laser beams is generated, controllably spatially shaped, selectively oriented, selectively moved via movement of a single optical fiber terminated with the axicon lens, and the oriented, spatially shaped laser beam applied via the single optical fiber terminated with the axicon lens to a living or nonliving microscopic object for manipulation, micro-dissection, alteration/ablation, and excitation of the living or nonliving microscopic object.

Abstract: Provided is a ferrule which includes a positioning mechanism configured to position an optical fiber having a predetermined outer diameter, and a recess configured for an adhesive to be disposed therein and having a first inner wall from which a front end of the optical fiber portion positioned by the positioning mechanism is protrudable, and a second inner wall opposite to the first inner wall. A distance between the first inner wall and the second inner wall is less than or equal to four times the outer diameter of the optical fiber.

Abstract: A light transmission assembly includes a light circuit board and a light transmission module. The board is embedded with waveguide layers, the waveguides layers includes core wires and shielding lays sandwiching the core wires, the waveguide layers defines a second light port portion of which the core wires defines vertical end faces. The light transmission module includes a base and a first light port portion projecting from a first face of the base, the first light port portion defines vertical end faces, the base defines a slanting surface at a second face opposite to the first face thereof. The first and second light port portions are aligned with each other when the light transmission module is coupled with light circuit board so that light lines go directly from the core wires through the light transmission module and reflect at the slant surface.

Abstract: An optical fiber includes a core (1a) having an oblong rectangular or square cross section and made of quartz, a cladding (2) surrounding the core (1a), having a circular outer cross-sectional shape, having a lower refractive index than the core (1a), and made of resin, and a support layer (3) surrounding the cladding (2) and made of quartz.

Abstract: A fiber laser amplifier system including a beam splitter that splits a feedback beam into a plurality of fiber beams where a separate fiber beam is sent to a fiber amplifier for amplifying the fiber beam. A tapered fiber bundle couples all of the output ends of all of the fiber amplifiers into a combined fiber providing a combined output beam. An end cap is optically coupled to an output end of the tapered fiber bundle to expand the output beam. A beam sampler samples a portion of the output beam from the end cap and provides a sample beam. A single mode fiber receives the sample beam from the beam sampler and provides the feedback beam.

Abstract: Methods and apparatus for a fiber optic display screen of adjustable size. In one embodiment, a screen comprises: a plurality of pixels formed by a terminal end of at least one optical fiber, wherein the pixels are substantially equidistant from each other along a first axis in a first screen size and in a second screen size that is larger than the first size.

Abstract: Method and apparatus for forming an optical-fiber-array assembly, which include providing a plurality of optical fibers including a first optical fiber and a second optical fiber, providing a fiber-array plate that includes a first surface and a second surface, connecting the plurality of optical fibers to the first surface of the fiber-array plate, transmitting a plurality of optical signals through the optical fibers into the fiber-array plate at the first surface of the fiber-array plate, and emitting from the second surface of the fiber-array plate a composite output beam having light from the plurality of optical signals. Optionally, the first surface of the fiber-array plate includes indicia configured to assist in the alignment of the plurality of optical fibers on the first surface of the fiber-array plate. In some embodiments, the second surface of the fiber-array plate includes a plurality of beam-shaping optics configured to shape the composite output beam.

Abstract: The present invention provides a hybrid integrated optical module having a high coupling efficiency by suppressing a connection loss between waveguides. A hybrid integrated optical module according to an embodiment of the present invention is an optical module which integrates a semiconductor chip and a PLC chip. The semiconductor chip has a semiconductor waveguide and is mounted on a Si bench. The PLC chip includes a PLC substrate and an optical waveguide formed on the PLC substrate. An end face of the semiconductor chip protrudes from an end face of the Si bench toward the PLC chip side by a protrusion amount X. Gap adjustment (adjustment of a distance D) between the semiconductor waveguide and the optical waveguide becomes possible by setting a position where the end face of the semiconductor chip is brought into contact with an end face of the PLC chip to be a reference position (zero point).

Abstract: An embodiment of a light launching portion of a photoplethysmographic device having a laser (20) light source and a light guide (40). The coupled end of the light guide (40) includes an anti-reflection coating (30a) to prevent or minimize the back reflection of light emitted by the laser (20). This minimizes the extent to which back reflected light can re-enter the laser and adversely alter the optical output properties of the laser (20) and additionally minimizes the associated light loss thus helping to maximize the optical coupling efficiency. Other embodiments are described and shown.

Abstract: A photoelectric connector assembly includes a first lens member connecting with fiber cables and defining convex lenses opposite to fiber cables, a connector and a substrate embedded with waveguides. The connector defines a mating cavity running through a front face thereof and inserted with said first lens member. The connector includes terminals with contacting sections exposing to the mating cavity, a second lens members. The second lens member is located at back of the first lens member and defines first convex lenses at a front face thereof and second convex lenses at a rear face thereof. The first convex lenses are coupled with the convex lens of the first lens member. The substrate defines light ports at free ends of the waveguides. The substrate is seated with the connector and the light ports are coupled with the second convex lenses of the second lens member.

Abstract: Elongated lighting system comprises an elongated light pipe having first and second ends, with light supplied to those ends by at least one light source, via first and second light couplers that condition light to increase reflections within the light pipe. Light-extraction structure on the light pipe extracts light from the side of the pipe. An indentation in the light pipe has a depth and has surfaces oriented with respect to the pipe so as (1) to redirect light from the first light source that reaches the indentation after passing once through a plane adjacent the indentation, back through the plane and towards the first end; and (2) to sufficiently increase the average angular distribution of light reflected from the indentation and passing back through the plane as would cause at least 50 percent more reflections of the foregoing light within the pipe in the absence of the light-extraction structure.

Abstract: In one embodiment, an apparatus may include an optical fiber that may have a surface non-normal to a longitudinal axis of a distal end portion of the optical fiber. The surface may define a portion of an interface configured to redirect electromagnetic radiation propagated from within the optical fiber and incident on the interface to a direction offset from the longitudinal axis. The apparatus may also include a doped silica cap that may be fused to the optical fiber such that the surface of the optical fiber may be disposed within a cavity defined by the doped silica cap.

Abstract: In an optical module, an optical element array is an array of optical elements. Further, a lens array is an array of a plurality of lenses. An output point of a light beam of each optical element of the optical element array is caused to coincide with a central line of a corresponding lens of the lens array, and the light beam is made incident on the lens and a parallel beam is output from the lens. When the output point of the light beam of the optical element coincides with an optical axis of the lens, an optical path within the optical element and the optical axis of the lens fail to coincide with each other.