Abstract: Methods, systems, devices, and products for formation evaluation. Methods include automatically characterizing an acoustic reflective boundary in the earth formation by: generating a plurality of multipole acoustic signals within the borehole; generating acoustic wave data at at least one acoustic receiver on the logging tool in response to a plurality of acoustic reflections of acoustic waves from a corresponding plurality of reflection points along the boundary responsive to the multipole acoustic signals; estimating from the acoustic wave data a location in the formation for each reflection point of the plurality of reflection points, which may include performing coherence processing on at least a portion of the acoustic wave data to generate a coherence map; and identifying acoustic reflections from the coherence map; and using the location in the formation for each reflection point to estimate at least one property of the acoustic reflective boundary.

Abstract: An arrangement and an associated method are described in which a boring tool is moved through the ground within a given region along a path in which region a cable is buried. The boring tool and the cable transmit a boring tool locating signal and a cable locating signal, respectively. Intensities of the boring tool locating signal and the cable locating signal are measured along with a pitch orientation of the boring tool. Using the measured intensities and established pitch orientation, a positional relationship is determined to relative scale including at least the boring tool and the cable in the region. The positional relationship is displayed to scale in one view. The positional relationship may be determined and displayed including the forward locate point in scaled relation to the boring tool and the cable. Cable depth determination techniques are described including a two-point ground depth determination method.

Abstract: A method for determining a formation thermal neutron decay rate from measurements of radiation resulting from at least one burst of high energy neutrons into formations surrounding a wellbore includes determining a first apparent neutron decay rate in a time window beginning at a first selected time after an end of the at least one burst, a second apparent decay rate from a time window beginning at a second selected time after the burst and a third apparent decay rate from a third selected time after the burst. The second time is later than the first time. A thermal neutron capture cross section of fluid in the wellbore is determined. A decay rate correction factor is determined based on the first and second apparent decay rates and a parameter indicative of the wellbore capture cross-section. The correction factor is applied to the third apparent decay rate to determine the formation thermal neutron decay rate.

Abstract: An airborne gravity-based transducer is disclosed as two embodiments with similar physical structures but different operating principles. The first design includes a particle acting as an active interface characterized by internal vibrations relating to its de Broglie wave, a resonant cavity for trapping the particle, and a phonon-wave source wherein the de Broglie and phonon waves interact over a junction area. In the second design, mechanical displacements between the transducer elements can be monitored through electromechanical transduction. Both designs include a power source and a biasing circuit for producing an electrical current across the junction, and a sensing system for measuring voltage. Both designs are capable of cancelling slowly-varying gravitational acceleration due to dynamic interaction in motion with the gravitational field and responding to small-scale gravity anomalies.

Abstract: Tools, methods and systems for detecting and reporting the presence of an obstruction to an AC system of the present disclosure are able to detect the presence of the obstruction using one or more sensors connected to the air conditioning unit and displaying an alert on the computer system of the AC system when the sensors detect the presence of the obstruction. By displaying an alert at the computer system's output device, the presence of the obstruction is brought to the user's attention, allowing the user to take remedial action as needed before initiating the air conditioning system into operation, preventing the obstruction from harming the components of AC system if the system was initiated while the obstruction was still present. Additionally, the AC system may further disable or prevent the operation and initiation of itself when the sensors of the air conditioning system detect the presence of an obstruction.

Abstract: One embodiment relates to a proximity sensor, a camera module comprising same, and a mobile terminal comprising same and comprises: a housing; a substrate disposed inside the housing; a sound output unit mounted on the substrate; a display unit disposed on the upper side of the housing; a camera module comprising a proximity sensor, which comprises a light-emitting unit and a light-receiving unit and detects the proximity of a user to the display unit at a predetermined distance by having the light-emitting unit and the light-receiving unit disposed at either side of the sound output unit, and a control unit for receiving the amount of light emitted by the light-emitting unit and the amount of light received by the light-receiving unit as inputs from the proximity sensor so as to operate the display unit; and a cover unit disposed on the display unit and provided over the sound output unit and the proximity sensor.

Abstract: A memristor element is used to create a spectrally programmable optical computing device for use in, for example, a downhole environment. An electromagnetic field is applied across the memristor element in order to alter its spectral properties. In turn, the spectral properties of sample-interacted light optically interacting with the memristor element are also altered. This alteration in spectral properties allows the memristor to be “programmed” to achieve a variety of transmission/reflection/absorption functions.

Abstract: A device for monitoring temperature response to stress change in strata, includes: a stress or strain sensor, disposed at the bottom of a borehole in the strata, encapsulated with expansive cement, and detecting a stress change in the strata; a temperature response amplifying unit, disposed in the borehole and above the sensor, encapsulated with expansive cement, and configured to detect a temperature variation caused by the stress change and to amplify said temperature variation; a power controlling and data collecting module disposed outside the borehole and configured to supply power to the sensor and the temperature response amplifying unit and to collect the stress change and the amplified temperature variation. Silicone or rubber is used to encapsulate the temperature sensors, by which the temperature response to stress change in strata is amplified effectively.

Abstract: A system and method for incorporating ground penetrating radar equipment on seismic source is disclosed. The system includes a seismic source platform, a seismic source coupled to the seismic source platform and configured to emit a seismic signal, a transmitter coupled to the seismic source platform using at least one piece of mounting equipment and configured to emit electromagnetic signals, an ground penetrating radar antenna coupled to the seismic source platform using at least one piece of mounting equipment and configured to receive reflected electromagnetic signals, and a ground penetrating radar recorder coupled to the seismic source platform and configured to record reflected electromagnetic signals.

Abstract: A method can include receiving data for a geologic environment where the data include data acquired via different types of borehole tool sensors; based at least in part on the data, determining rock composition of the geologic environment where the rock composition includes depositional components and diagenetic components; and, based at least in part on the rock composition, outputting a stratigraphic model of at least a portion of the geologic environment.

Abstract: A water body drifter device for tracking movement of a fluid is disclosed. The drifter may include a floater assembly having a toroid shaped buoy fixedly connected to a floater head disposed interiorly to the toroid shaped buoy, the floater head having a recess and a cap sealably attached to the recess for housing a network-enabled controller. The drifter may also include one or more sensors mounted to the floater assembly to capture physical, chemical or biological data from the water body and/or from the environment around the water body, a drogue formed of a plurality of blades each spaced from one another, and a flexible connector attached to the floater assembly at one end and the drogue at another end. The floater assembly, the drogue, and the flexible connector may each be formed of one or more biodegradable materials.

Abstract: A system is described for calibrating fiber optic well measurements including a fiber optic waveguide disposed proximal to a wellbore, a sensor coupled to the fiber optic waveguide, the sensor configured to record a plurality of signals detected by the waveguide, and a computer system configured to calibrate the signals from the waveguide by filtering out one or more background acoustic responses from the plurality of signals. A method for calibrating the signals is also described.

Abstract: A set of characteristics of a period is extracted from a forecast that is applicable to the period and a geographical area. From a repository, a set of historical data is selected corresponding to a historical period, the set of historical data including a historical forecast related to the geographical area, and an actual measurement of wind at a location in the geographical area, the set of historical data having a subset of the set of characteristics. From the set of historical data, a function is computed to represent a discrepancy between the historical forecast and the actual measurement over the historical period. A bias value is computed from the function. By applying the bias to a value in the forecast, an adjusted forecast is produced of winds at a wind turbine located at a location in the geographical area.

Abstract: A method for precision snow removal analysis provides a melt rate in inches per day for roadways in a geometric region is provided. Elevation data is used to calculate upward looking hemispherical viewsheds at each roadway coordinate to determine the total solar radiation. The snowmelt capacity and slope are determined at each coordinate and the data is displayed on a geographical map of the roadway. The processing speed of the computer is improved since the snowmelt capacity is only determined for a roadway subset of the region coordinates.

Abstract: Systems and methods are disclosed to determine the severity of a thunderstorm and/or track the path of a thunderstorm. For instance, multiple thunderstorms may be tracked by assigning detected lightning flashes to thunderstorm objects based on a number of previous lightning flashes assigned to each of the thunderstorm objects and a distance between each of the lightning flashes and each of the thunderstorm objects. In addition, an updated position may be determined for each of the thunderstorm objects based on positions and ages of lightning flashes assigned to each of the thunderstorm objects. The severity of a given thunderstorm may be determined based on lightning rates, types, and/or polarities of lightning flashes and/or lightning pulses of the thunderstorm object.

Abstract: A retardation plate is formed by laminating at least two retardation plates of a retardation plate 1 and a retardation plate 2, in which at least one of the retardation plate 1 and the retardation plate 2 is formed of a polymer of a polymerizable liquid crystal composition. It is possible to provide a retardation plate imparting a phase difference of ¼ wavelength over a wide wavelength region, a circularly polarizing plate having excellent anti-reflection performance over a wide wavelength region, and a display element or a light-emitting element having excellent visibility.

Abstract: There is disclosed a tin-containing metal oxide nanoparticle, which has an index of dispersion degree less than 7 and a narrow particle size distribution which is defined as steepness ratio less than 3. There is disclosed dispersion, paint, shielding film and their glass products which comprise the said nanoparticles. Besides, there are also disclosed processes of making the tin-containing metal oxide nanoparticle and their dispersion. The tin-containing metal oxide nanoparticles and their dispersion disclosed herein may be applied on the window glass of houses, buildings, vehicles, ships, etc. There is provided an excellent function of infrared blocking with highly transparent, and to achieve sunlight controlling and thermal radiation controlling.

Abstract: Self-cleaning optic apparatuses and automobiles with self-cleaning optic apparatuses are provided. An exemplary self-cleaning optic apparatus includes an optic device for transmitting or receiving light. The optic device is located in a chamber. The self-cleaning optic apparatus further includes a window for transmitting the light. Also, the self-cleaning optic apparatus includes a photocatalytic coating on a surface of the window. Energy emitted from within the chamber activates a photocatalytic reaction in the photocatalytic coating.

Abstract: A lens unit according to an embodiment includes: lens members in each of which lenses are linearly arrayed in a longitudinal direction; at least one light block member between the lens members; engagement sections arranged in the longitudinal direction, each of the engagement sections configured to mutually engage members including the lens members and the light block member and stacked with each other; and clamp members disposed in positions corresponding to at least one of the engagement sections in the longitudinal direction and configured to clamp the stacked members. All the stacked members are fixed with each other at only one portion in the longitudinal direction.

Abstract: An image sensing device includes a substrate, a light sensing circuit disposed on the substrate, an optical film. The optical film includes a transparent film having a first light transmittance value wherein the first light transmittance value includes a red light transmittance value and a blue light transmittance value, and the red light transmittance value is greater than the blue light transmittance value; and a grating structure having a second light transmittance value, wherein the first light transmittance value is greater than the second light transmittance value. The substrate is sandwiched between the light sensing circuit and the optional film, and a light source disposed on the optical film, wherein the optical film is sandwiched between the substrate and the light source.

Abstract: The glass article has a three-dimensional shape. The glass article contains a first surface and at least one second surface opposite to the first surface, and contains a bent part in at least one place of the first surface or the second surface.

Abstract: A diffraction grating may include a substrate. The diffraction grating may include an etch stop layer to prevent etching of the substrate. The etch stop layer may be deposited on the substrate. The diffraction grating may include a marker layer to indicate an etch end-point associated with etching of a dielectric layer. The marker layer may be deposited on a portion of the etch stop layer. The diffraction grating may include the dielectric layer to form a grating layer after being etched. The dielectric layer may be deposited on at least the marker layer.

Abstract: An infrared (IR) cut filter includes an absorption type filter, a first coating layer, and a second coating layer. The absorption type filter absorbs IR light of a first wavelength band. The first coating layer is formed on a first side of the absorption type filter and passes visible light and reflects a part of the IR light. The second coating layer is formed on a second side of the absorption type filter and reflects a remaining part of the IR light that passes through the first coating layer and enters the absorption type filter. The absorption type filter further absorbs the IR light of a second wavelength band within the absorption type filter. In addition, a camera module having the IR cut filter is provided and an electronic device having the camera module also is provided.

Abstract: The pressure-sensitive-adhesive-layer-attached polarizing film of the present invention has, in this order, a polarizer containing a polyvinyl alcohol-based resin, a transparent resin layer containing a polyvinyl alcohol-based resin, and a pressure-sensitive adhesive layer, wherein the pressure-sensitive adhesive layer is formed from a pressure-sensitive adhesive composition containing at least 0.1 parts by weight of an alkali metal salt with respect to 100 parts by weight of a base polymer, and satisfying the general expression (Y/X)?3, where X is the abundance ratio of the alkali metal salt in a center part in the thickness direction of the pressure-sensitive adhesive layer, and Y is the abundance ratio of the alkali metal salt in the interface between the pressure-sensitive adhesive layer and the transparent resin layer.

Abstract: The present invention provides a quantum dot polarization plate, which includes a polarization film (10) and a quantum dot bright enhance film (20) laminated on the polarization film (10). The polarization film (10) includes a polarization layer (11) and a first protection layer (12) and a second protection layer (13) respectively located at opposite sides of the polarization layer (11). The quantum dot bright enhance film (20) is attached to the second protection layer (13). The quantum dot bright enhance film (20) is a film containing therein quantum dots (201). The quantum dot polarization plate is formed by attaching the quantum dot bright enhance film to the polarization film so as to reduce the operations for forming the quantum dot polarization plate. The quantum dot polarization plate provides light polarization and effectively expands color gamut coverage rate and also realize wide view angle of the display device and can be manufacturing with simple operations.

Abstract: A polarizing plate includes a polarizer, and a quarter wave film (QWF) layer and a +C (positive C) plate layer, which are disposed on a lower side of the polarizer, wherein a total refractive index ratio Nz of the polarizer, the quarter wave film layer, and the +C plate layer is 0.1 to 0.8, and thereby shows excellent antireflection effects in an oblique direction of a screen as well as in a front direction thereof, and an image display apparatus including the same.

Abstract: A metamaterial optical filter including: a transparent substrate; and a photosensitive polymer layer provided to the transparent substrate, wherein the photosensitive polymer layer is treated using a laser to form a non-conformal holographically patterned subwavelength grating, the holographic grating configured to block a predetermined wavelength of electromagnetic radiation. A system and method for manufacturing holographically patterned subwavelength grating onto the photosensitive polymer layer including: applying a photosensitive polymer layer to a transparent substrate; placing the photosensitive polymer layer between a laser and a mirror; scanning the laser over the photosensitive polymer layer such that a holographic grating is created within the photosensitive polymer layer by interaction between the laser light and light reflected from the mirror; and stacking two or more holographically patterned subwavelength grating layers to form complex metamaterial optical filter stacks.

Abstract: A light-emitting apparatus includes: a first light guide which includes a first photoreceptor, a second photoreceptor, and a leak, the first light guide guiding light radiated by a radiation apparatus and received by the first photoreceptor and the second photoreceptor, the leak allowing leakage light to be leaked out, the leakage light being part of the light; a converter which converts a wavelength of the leakage light leaked out of the first light guide; a second light guide which is disposed along the first light guide, the second light guide guiding the light radiated by the radiation apparatus and received by a third photoreceptor to the second photoreceptor; and a protector which is tubular and in which the first light guide and the second light guide are disposed such that the first photoreceptor and the third photoreceptor are disposed at a same open end.

Abstract: According to one embodiment, a light source device includes a light-emitting chip, and a case in which the light-emitting chip is accommodated. The case includes a light-emitting surface which transmits light from the light-emitting chip, and a plurality of sidewalls extending so as to intersect the light-emitting surface. At least a part of the sidewalls is colored or painted in black.

Abstract: A white light source includes an array of light emitting elements arranged to a light guide. A light in-coupling array is arranged so that each light emitting element faces a light in-coupling element to incouple in the light guide a portion of the divergent light beams so that the in-coupled angle of at least a part of the light rays of the in-coupled light beam is higher than 45°. An array of light homogenizing elements is arranged so that each light homogenizing element faces a light incoupling element and so that the deflection angle of at least a fraction of the incident part of the in-coupled light beam incident on each of said homogenizing elements is higher than 45°. The white light source provides a uniform outcoupled white light beam.

Abstract: The invention provides an optical component for transferring light between an opto-electronic device and a light transmissive panel which defines two opposing boundary surfaces, the optical component having a shape formed from a geometric shape having a base surface, a lateral front surface and an axis, wherein the geometric shape is truncated by a plane intersecting the front surface, the base surface, and the axis, forming a back surface. The base surface is configured for mounting the optical component to the light transmissive panel and for coupling light into the light transmissive panel. The front surface being configured for coupling light from the front surface, through the base surface, and into the light transmissive panel for the light to propagate by total internal reflection within the light transmissive panel.

Abstract: A light guide plate includes a flat plate body and multiple protrusion platforms. The flat plate body includes a top surface and a bottom surface. The multiple protrusion platforms are disposed on the bottom surface. A protrusion surface of each protrusion platform is formed by multiple pyramids. A backlight module and a liquid crystal display are also disclosed. After lights emitting from the light source and entering the light guide plate irradiates the protrusion platform, a total reflection of the lights will be broken. Accordingly, a portion of lights emit out from the top surface, the other portion of the lights emit out from the bottom surface and be reflected back to the light guide plate. The protrusion platforms can replace the mesh dot and the reflective sheet to reduce a thickness of the backlight module to increase a light utilization rate, reduce the manufacturing process and production cost.

Abstract: A light source module includes a light guide plate, a reflecting film, and a plurality of edge-type light emitting diode (LED) units. Grooves are defined in a lower surface of the light guide plate. The reflecting film is below the lower surface and covers the entire lower surface and the grooves. An air gap is defined between the reflecting film and the lower surface. The edge-type LED units are located in the grooves. Each edge-type LED unit includes an LED chip, a wavelength converting layer, and a light reflecting layer. Light emitted is converted by the wavelength converting layer, reflected towards sidewalls of the wavelength converting layer, and transmitted to the lower surface. The reflecting film reflects light that enters the air gap towards an upper surface of the light guide plate, enabling uniform emission of light from the upper surface.

Abstract: An illumination device of a vehicle, including: a light source; a bar-shaped light guide member; and a diffusion member having a lens unit, the lens unit having an L-shaped cross-section, and a light-emitting portion and a light-receiving portion, wherein the light guide member has a light-emitting surface, and the light guide member and the lens unit are disposed such that a light-receiving surface of the light-receiving portion of the lens unit is opposed to the light-emitting surface of the light guide member.

Abstract: Dual-sided optical films have extended split spreading structures formed on one major surface, and extended prisms formed on an opposite major surface. One portion of each split spreading structure has a low light spreading characteristic, and another portion has a high light spreading characteristic. For each split spreading structure, the low light spreading portion may be disposed alongside the high light spreading portion. The split spreading structures may be arranged in a one-to-one correspondence with the prisms. Light that enters a given prism from one inclined surface thereof can be associated primarily with light transmitted through the low light spreading portion of the split spreading structure, and light that enters the given prism from the other inclined surface thereof can be associated primarily with light transmitted through the high light spreading portion.

Abstract: According to an aspect, a display apparatus includes: a first light-transmissive substrate; a second light-transmissive substrate arranged to face the first light-transmissive substrate; a liquid crystal layer including polymer dispersed liquid crystals sealed between the first light-transmissive substrate and the second light-transmissive substrate; at least one light-emitting device arranged to face at least one of a side surface of the first light-transmissive substrate or a side surface of the second light-transmissive substrate; and at least one reflector arranged on at least one of a side surface of the first light-transmissive substrate or a side surface of the second light-transmissive substrate, the side surface of the first or second light-transmissive substrate being on an opposite side of the side surface of the first or second light-transmissive substrate to which the at least one light-emitting device faces, and configured to reflect light at the side surface on the opposite side.

Abstract: The present disclosure provides a light source module that includes a substrate, a plurality of light barriers on a surface of the substrate and spaced apart from each other, a plurality of light source packages on the surface of the substrate and positioned between the plurality of light barriers, and a total-reflection induction layer on the plurality of light source packages. The total-reflection induction layer has a flat surface opposite the plurality of light source packages. According to the various embodiments provided herein, the amount of light incident on a light guide plate increases, and a heat radiation effect is improved.

Abstract: Optical fibers having a large effective area are disclosed. Three main embodiments of the optical fiber allow for single-mode operation at wavelengths of 850 nm, 980 nm and 1060 nm, respectively and have a large effective area with low bend losses. The large effective area optical fiber is expected to be particularly useful for data center applications due to its ability to efficiently optically couple with photonic integrated devices. Integrated systems and optical communication systems that employ the optical fibers are also disclosed.

Abstract: An optical fiber comprising: (i) a chlorine doped silica based core comprising a core alpha (?)>10, and maximum refractive index delta ?1max % and Cl concentration >1 wt %; (ii) a cladding surrounding the core, the cladding comprising: (a) an inner cladding region adjacent to and in contact with the core and having a refractive index delta ?2 and a minimum refractive index delta ?2min such that ?2min<?1max, the inner cladding region comprising fluorine doped silica and the refractive index delta ?2 with region that decreases with radial position, and (b) an outer cladding region surrounding the inner cladding region and having refractive index delta ?3, such that ?2min<?3. The fiber has mode field diameter MFD at 1310 nm of ?9 microns, a cable cutoff of ?1260 nm, zero dispersion wavelength of 1300 nm?zero dispersion wavelength ?1324 nm and bend loss at 1550 nm for a 20 mm mandrel of less than 0.5 dB/turn.

Abstract: Single mode optical fibers with a chlorine doped core and a cladding having a fluorine doped trench region are disclosed. The optical fiber includes a chlorine doped silica core having a core alpha ??10, a core radius r1 and maximum refractive index delta ?1max % and a Cl concentration?0.9 wt %. The optical fiber also has a cladding surrounding the core, the cladding having an inner and an outer cladding. The inner cladding has first and second cladding regions. The optical fiber has mode field diameter at 1310 nm of larger than 9 microns, a cable cutoff wavelength of ?1260 nm, a zero dispersion wavelength ?0, where 1300 nm??0?1324 nm, and bend loss at 1550 nm for a 20 mm mandrel of less than 0.5 dB/turn.

Abstract: A system and method for improving VLSI of photonic components such as by improved volumetric packing density that preserves and/or enhances photonic operations and functions. Optical vias are distributed throughout a multi-tiered photonic device. These optical vias are optically communicated with different types of path optics to allow photonic information to be accessed, processed, and transmitted by photonic processing elements distributed on the various tiers.

Abstract: A semiconductor optical apparatus is disclosed, wherein the semiconductor optical apparatus comprises a first waveguide region defining a first mode size and a second active waveguide region defining a second mode size being smaller than the first mode size. The second active waveguide region is optically coupled to the first waveguide region and the second active waveguide region comprises a lower multiple quantum well layer and an upper multiple quantum well layer located above the lower multiple quantum well layer. The lower multiple quantum well layer is physically separated from the upper multiple quantum well layer by a spacer layer. The upper multiple quantum well layer comprises a mode transformation region configured to reduce the size of an optical mode from the first mode size to the second mode size.

Abstract: This method for manufacturing a germanium slow light waveguide includes: producing, in a silicon plate, a cavity the cross section of which, parallel to the plane of the plate, is identical to the horizontal cross section of the slow light waveguide and the bottom of which is located inside the silicon plate; then carrying out an operation of vapour phase epitaxial growth of germanium on the bottom of the cavity until this cavity is completely filled with germanium; and before implementing said epitaxial growth operation, a protective layer is deposited on an upper face of the silicon plate or, after implementing said epitaxial growth operation, the germanium that has grown on said upper face is removed.

Abstract: The present disclosure relates to a method of fusion splicing an optical fiber. The method includes the steps of mechanically stripping a coating layer from the optical fiber to form a bare fiber end and inserting the bare fiber end of the optical fiber into a resistive heating element structure to remove residual coating from a cladding layer. The resistive heating element structure shapes a severed end of the coating layer such that the severed end is fully within a cylindrical envelop defined by a non-disturbed portion of the coating layer. The method further includes a step of loading the optical fiber into an alignment groove of a fiber alignment fixture such that the shaped severed end of the optical fiber is in contact with the alignment groove. The method includes a step of fusion splicing the bare fiber end of the optical fiber to a cable fiber.

Abstract: A system for positioning an optical preform in a furnace is provided that includes an upper muffle and a downfeed handle assembly with a tube defining a first end and a second end, the second end extending into the upper muffle. A handle is disposed within the tube. A second end of the handle extends into the upper muffle and a seal assembly is positioned around both the tube and the handle. The first end of the handle extends through the seal assembly and a drive assembly is coupled with the downfeed handle.

Abstract: An optical demultiplexer that separates, for each signal wavelength, signal light a plurality of wavelengths of which is multiplexed, the optical demultiplexer including: an antireflection film disposed at on an incident surface of a glass block; filters disposed on an emission surface of the glass block, the filters transmit light of a wavelength predetermined for each signal wavelength included in the signal light and reflect light of a wavelength other than the transmitting wavelength toward the incident surface; and a reflection film disposed on the incident surface of the glass block, wherein processing to reduce reflection of the reflection light into the glass block is applied on an optical path of the reflection light reflected by the filter disposed at an end away from the antireflection film.

Abstract: A transmissive photonic crystal fiber ring resonator employing single optical beam-splitter comprises: a first fiber-optic collimator, a second fiber-optic collimator, a first photonic crystal fiber collimator, a second photonic crystal fiber collimator, an optical beam-splitter, and a fixture. The first fiber-optic collimator, the second fiber-optic collimator, the first photonic crystal fiber collimator, the second photonic crystal fiber collimator, and the optical beam-splitter are fixed on the fixture; the fiber pigtails of the first fiber-optic collimator and the second fiber-optic collimator are the input/output ports; the fiber pigtails of the first photonic crystal fiber collimator and the second photonic crystal fiber collimator are connected.

Abstract: A method of forming an optical surface on an end portion of an optical fiber comprises inserting the optical fiber through a ferrule bore of a ferrule so that the end portion extends past an end face on the ferrule. At least one laser beam is emitted from at least one laser and directed to the end face of the ferrule. The at least one laser beam is shaped into an ellipse and comprises at least 90 percent linearly-polarized light incident on the end face of the ferrule as S-polarized light. The at least one laser is operated so that the S-polarized light reflects off the end face of the ferrule and cleaves the end portion of the optical fiber.

Abstract: Systems for communication in a rotary joint. In one example, a communication system includes a stator, a rotor, a plurality of optical receivers circumferentially disposed at a first radius of one of the stator and the rotor, a plurality of optical transmitters circumferentially disposed at a second radius of the other of the stator and the rotor, each optical transmitter of the plurality configured to transmit a data signal to a corresponding optical receiver of the plurality of optical receivers, and a plurality of optical elements, individual optical elements having one of a first size and a second size, wherein individual optical elements are interposed between each optical transmitter of the plurality of optical transmitters and each optical receiver of the plurality of optical receivers and arranged so as to alternate between the first size and the second size along one of the first radius and the second radius.

Abstract: An optical module includes an optical waveguide; a lens sheet including a lens; a substrate on one surface of which at least one of a light emitting element and a light receiving element is mounted; a first adhesion film that adheres the optical waveguide and the lens sheet; a second adhesion film that adheres the lens sheet and the substrate; and an adhesive agent introducing area, provided at at least one of the first adhesion film and the second adhesion film, to which an adhesive agent is supplied.