An alignment apparatus and an alignment method that enables to align an optical device with a receptacle, where the optical device and the receptacle have respective axes tilted to each other. The method includes steps of: (1) obtaining a minimum pressure caused to the optical device from the receptacle as varying a rolling angle around the X-axis of the optical device but fixing the pitching angle around the Y-axis at a rotating angle around the Z-axis; (2) determining a rotating angle where thus obtained minimum pressure becomes the minimum; and (3) iterating those procedures until the rotating angle obtained as varying the rolling angle and another rotating angle obtained as varying the pitching angle substantially coincides to each other.

An optical package for providing efficient coupling between a photonic device and a silicon photonic integrated-circuit chip (Si PIC) edge couplers with low return loss, as well as variations thereof, is described. The optical package may include a photonic device, a Si PIC, a single mode fiber or fiber array assembly, a lens and a spacer. The Si PIC may an input edge coupler and an output edge coupler. The single mode fiber or fiber array assembly may be aligned to the output edge coupler. The lens may be disposed between the photonic device and the input edge coupler, and may be configured to minimize a mismatch between an output spot size of the photonic device and a spot size of the input edge coupler of the Si PIC. The spacer may be bonded to a facet of the input edge coupler with an index matching fluid.

The invention relates to a transparent auxiliary ring for the adjustment, for the long-term stable operation and for protection of fiber-coupled laser arrangements.

A plug of a connector that performs optical transmission is provided with an optical connection unit. The optical connection unit includes a lens that is provided on a side surface of the optical connection unit and performs optical connection with a lens provided on an optical connection unit of a receptacle in a direction orthogonal to an inserting/removing direction of the plug, and a locating surface that is provided on the side surface of the optical connection unit and abuts on a locating surface of the receptacle to determine a position of the optical connection unit in a mating condition of the plug into the receptacle.

A laser device has a plurality of laser diodes; a plurality of optical elements installed corresponding to the plurality of the laser diodes; a plurality of units formed by fixing the laser diodes and the optical elements per each laser diode and installed corresponding to the plurality of the laser diodes; a converging element that converges laser beams emitted from the plurality of the laser diodes to a fiber; a housing element houses the plurality of the units and the converging element; and a thermal transfer plate performs heat dissipation of the plurality of the units. The heat resistance reducing element having a heat resistance value that is smaller than a predetermined value is installed between the thermal transfer plate and each unit or the processing for reducing the heat resistance is performed.

An optical module includes a lens sheet having one or more lenses, a substrate having a photoelectric conversion device mounted on a first face thereof and having a first penetrating hole formed therethrough between the photoelectric conversion device and the one or more lenses, and an adhesive layer configured to bond a face of the lens sheet to a second face of the substrate, wherein the adhesive layer has a second penetrating hole formed therethrough between the one or more lenses and the photoelectric conversion device, and a pathway is provided to connect a space constituted by the first penetrating hole and the second penetrating hole to an outside of the space.

Photonic devices and methods of manufacture are provided. In embodiments a fill material and/or a secondary waveguide are utilized in order to protect other internal structures such as grating couplers from the rigors of subsequent processing steps. Through the use of these structures at the appropriate times during the manufacturing process, damage and debris that would otherwise interfere with the manufacturing process of the device or operation of the device can be avoided.

The light communication solution presented herein uses waveguides with multiple entrances to efficiently collect light used for light communications and propagate that collected light to a sensor. To that end each waveguide entrance, or at least all but the initial waveguide entrance, is configured to not only collect and input the light into the TIR waveguide, but also to maintain TIR of light already propagating within the TIR waveguide. In so doing, the solution presented herein increases the amount of light available for light communications. Further, because each waveguide may channel light from multiple collection points to a single sensor, the solution presented herein reduces the number of sensors needed for the light communications. The solution presented herein facilitates the implementation of light communications for a wide variety of devices (e.g., cellular telephones, tablets, smartphones, smart watches, smart glasses, etc.) and/or in a wide variety of scenarios.

An optical amplification apparatus includes a plurality of input ends configured to receive a plurality of first optical signals with different wavelengths, a plurality of output ends configured to output a plurality of second optical signals obtained by amplifying the first optical signals, and a first pump source configured to provide a first pump light for amplifying the first optical signals. The apparatus also includes a first multi-port wavelength division multiplexing coupler having a plurality of first connection ports connected to the input ends. The apparatus further includes a first optical fiber connection cable connecting the first pump source with the first multi-port wavelength division multiplexing coupler. The first optical fiber connection cable is configured to transmit the first pump light. The apparatus additionally includes an active optical fiber connection cable having an active doped fiber for transmitting and amplifying a plurality of third optical signals.

A touch sensing apparatus is disclosed comprising a panel that defines a touch surface, a plurality of emitters and detectors arranged along a perimeter of the light transmissive panel, and a light directing arrangement arranged adjacent the perimeter. The emitters are arranged to emit a respective beam of emitted light and the light directing arrangement is arranged to direct the light along a light path from the emitters to the touch surface. A diffusive light scattering element is arranged in the light path.