52results about How to "Coupling efficiency is high" patented technology

Multi-mode diode emitters are stacked in a staircase formation to provide a spatially-mulitplexed output. Improved coupling efficiency is achieved by providing tilted collimated output beams that determine an effective step height of the stepped structure. Since the effective step height is dependent on the tilt angle, a variable number of emitters can be used inside packages having a same physical step height, while still attaining high coupling efficiency.

Provided is a hybrid laser diode. The hybrid laser diode includes: a silicon layer constituting a slab waveguide; and a compound semiconductor layer disposed on the silicon layer to constitute a channel waveguide.

The present invention provides an optical transmitter for transmitting an optical signal using an optical fiber as a transmission medium. The optical transmitter comprises: a substrate having a through hole; and a light-emitting element disposed on a rear surface of the substrate and having a light-emitting portion. The through hole has an inner wall. The through hole has an inside diameter increasing from a rear surface side of the substrate toward a front surface side thereof. The light-emitting element is disposed so that the light-emitting portion is exposed within the through hole. The light-emitting portion radiates light beams toward a front surface of the substrate. The through hole is such that part of the light beams goes out the through hole without being reflected, and that the other light beams go out the through hole after being reflected from the inner wall thereof. It is possible to increase the coupling efficiency of the optical transmitter by effectively utilizing a light beam light having a wide radiation angle, and improve heat dissipation thereof, while achieving miniaturization and cost reduction of the optical transmitter.

An optical waveguide module which satisfies highly-accurate and stable optical connection between optical elements and optical waveguides and can be easily fabricated is provided. As means for it, in an optical waveguide module having: an optical waveguide surrounded by a cladding layer and provided with a mirror part formed of a tapered surface on a first end side; an optical element having a concave part in a first surface of a semiconductor substrate; and a convex member provided on the cladding layer so as to be planarly overlapped with the mirror part, the convex member is mated with the concave part of the optical element.

An integrated optical circuit device includes: a first optical element section including first and second element regions deposited along a thickness direction; a second optical element section formed away from the first optical element section; and a multimode interference region provided between the first and second optical element sections, the multimode interference region including a buried portion formed along a light propagation direction. The first and second optical element sections are optically coupled to each other via the multimode interference region.

A mobile communication device (1, 10) comprises shielding components that provide electromagnetic shielding or attenuation between a first area (A) and a second area (B, B1, B2) within and/or external of the communication device (1, 10). In said first area (A) an antenna (4) and at least one ferrite (6) are arranged, which ferrite (6) is provided to interact with said antenna (4) and to guide a magnetic flux between said first area (A) and said second area (B, B1, B2).

An external cavity laser apparatus and method wherein wavelength or channel selection is carried independently from adjustment of external cavity optical path length. The apparatus comprises a wavelength or channel selector tuner and an external cavity tuner, wherein the wavelength tuner is uncoupled from the external cavity tuner. The tuning mechanisms for wavelength selection and cavity optical path length are configured to operate independently or orthogonally with respect to each other. The wavelength tuner may operate according to a first, channel selection signal, while the external cavity tuner operates according to a second, external cavity adjustment signal. The wavelength tuner and external cavity tuner may operate under the control of the same, or of separate controllers. The channel selection signal may be derived from a look-up table of adjustment parameter data accessed by a controller, and the external cavity adjustment signal may be derived from an error signal from a detector configured to measure external cavity loss.

One or more embodiments of the present invention provide apparatuses, methods and systems to form a thin LED backlight unit for a large-screen flat-panel display. The backlight unit is able to achieve improved color mixing within a shorter mixing distance than the conventional art, while maintaining desired brightness uniformity, thereby allowing for a shorter bezel of a display device. One or more embodiments of the present invention include one or more light guides, which, by operating together, provide thin backlight units. High system efficiency is provided by introducing a recycling enhancement component, and uniform color distribution is achieved by incorporating color shift compensation. Multiple light guides are arranged adjacent to one another can offer a progressive scan illumination feature.

Disclosed is an optical collimator-use lens component including: a thin tube; a partially spherical lens that has been fixed in an inner hole of the thin tube so that an insertion portion having a predetermined length is left, is made of glass whose refractive index is approximately uniform, and has translucent spherical surfaces, whose centers of curvature are approximately the same, at both ends of a cylindrical portion of the partially spherical lens; and an adhesive that bonds the partially spherical lens to the thin tube. An axial deviation amount between a center axis of the thin tube and an optical axis of the partially spherical lens is 5 μm or less. When a capillary tube, in whose inner hole an optical fiber has been fixed and whose axial deviation amount between an outer peripheral surface of the capillary tube and a core center of an end surface of the optical fiber is 1.5 μm or less, is inserted into the insertion portion of the thin tube and the end surface of the optical fiber is fixed at a position at which a distance of the end surface to a focal point position of the partially spherical lens becomes ±40 μm or less, emission light has an emission light bend of 0.2° or less with respect to the center axis of the thin tube.

A block copolymer of the formula [S-I-(I/B)]_nX or [S-I-(I/B)-/B]_nX or mixtures thereof wherein each S is independently a polymer block of an alkenyl arene; each I is a polymer block of isoprene; each B is a polymer block of butadiene and each (I/B) is a mixed random polymer block of isoprene and butadiene in a weight ratio I:B of from about 10:90 to about 90:10, n is an integer equal to or greater than 2, X is the residue of a coupling agent, and wherein the alkenyl arene content of the block copolymer represents a weight ratio of the alkenyl arene block to conjugated diene block of the total block copolymer and is in the range of from about 15 to about 35 wt %. Compositions for the manufacture of transparent, gel-free films, adhesives, fibers, injection molded articles, dipped goods, oil gels, and bitumen are also disclosed and comprise from about 3 to about 90 wt % of the claimed block copolymer and one or more components selected from thermoplastic resins, polyolefins, tackifying resins, end block resins, polystyrene, oils, engineering thermoplastics, fillers, and antioxidants.

The invention relates to an optoelectronic transmission and/or reception arrangement. The arrangement includes a transmission and/or reception module containing an optoelectronic transmission and/or reception component, and a plug interface for the coupling of an optical fiber thereto. An optical waveguide section is arranged in the plug interface, and at one of its ends is optically coupled to the transmission and/or reception component. At its other end, the optical waveguide section is configured to be coupled to an optical fiber. The arrangement may further include a lens for optical coupling of the light between the optical waveguide section and the transmission and/or reception component. The lens and the optical waveguide section, in one example, are formed as a prefabricated subassembly, in which the lens is fixedly arranged at a defined distance from one end face of the optical waveguide section.

A light projector has a light emitting device having a light emitting surface, an optical fiber having an incident end-face to which light emitted from the light emitting surface enters, and a lens arranged between the light emitting surface of the light emitting device and the incident end-face of the optical fiber. The light emitting device, the optical fiber and the lens are arranged on one optical axis. The optical fiber includes a core region as a region including a single core of uniform refractive index or a region collectively encompassing a plurality of cores having uniform refractive index. The lens converts diffused light emitted from the light emitting surface to diffused light that widens more moderately.

A bi-directional fiber optic transceiver includes a laser diode, a photodiode, first and second lenses, all of which share a common linear optical axis, and a housing. The first lens may have transmission increasing film thereon. The second lens may have a reflection increasing film thereon. An optical splitter may be between the first and second lenses. The first and/or second lenses may be spherical, hemispherical or aspheric. The transceiver size is reduced so that a circuit board can accommodate more components or be smaller in size. Utilizing hemispherical lenses can greatly increase the coupling ratio of the optical links between the photodiode, fiber and laser diode. Utilizing aspheric lenses with high coupling can serve high power output requirements. Use of spherical lenses (which extend the focal length) with aspheric lenses enables LD TO assemblies in individual housings to serve in various products.

One or more fiber optic rotary joints (FORJ), free space beam combiners, OCT, SEE and/or fluorescence devices and systems for use therewith, methods of manufacturing same and storage mediums are provided. One or more embodiments of FORJs may be used with numerous applications in the optical field, including, but not limited to, OCT and fluorescence applications. Examples of such applications include imaging, evaluating and diagnosing biological objects, such as, but not limited to, for Gastro-intestinal, cardio and/or ophthalmic applications, and being obtained via one or more optical instruments.

An apparatus for particle characterisation, comprising: a sample cell for holding a sample; a light source configured to illuminate the sample with an illuminating beam and a plurality of light detectors, each light detector configured to receive scattered light resulting from the interaction between the illuminating beam and the sample along a respective detector path, wherein each respective detector path is at substantially the same angle to the illuminating beam.