A coaxial lidar system includes one or more emitter channels and one or more sensor channels that share an optical module. A diffractive waveguide can be used to redirect received light from the shared optical module to the sensor channels.

A transceiver assembly for mounting on a mother board, said transceiver assembly comprising: (a) a frame defining a first plane configured for mounting parallel to said motherboard, said frame defining a plurality of slots perpendicular to said first plane; and (b) one or more opto-electric cards, each of said one or more opto-electric cards disposed in one of said plurality of slots and comprising at least, (i) a substrate having a first edge parallel to said first plane when said opto-electric card is mounted in said slot, (ii) an electrical interface along said first edge, (iii) and an interposer electrically connected to said electrical interface and comprising at least one optical component operatively connected to said electrical interface, and (iv) at least one optical fiber extending freely from said interposer.

An optical connector mechanism includes an abutting portion that applies a pressing force so as to cause an end surface of a first optical transmission and reception path and an end surface of a second optical transmission and reception path to abut against each other, a first case that houses the first optical transmission and reception path, a second case that houses the second optical transmission and reception path, a sleeve case slidably attached to the first case, an elastic bar member including one end portion fixed to the first case and another end portion to be inserted into the second case, an engagement portion that engages the other end portion of the elastic bar member with the second case, and an engagement releasing portion that presses the elastic bar member so as to release the engagement performed by the engagement portion when the sleeve case slides.

A counterfeit paper currency detector with a barcode reading function includes a casing unit receiving a delivering device, a driving device, a paper currency detection device, and a barcode reading device. The delivering device includes a passageway between an upper base and a lower base. The driving device drives a paper currency or a barcode sheet to pass through the passageway. When a paper currency passes through the passageway, a plurality of first paper currency detection units and a plurality of second paper currency detection units of the paper currency detection device examine whether the paper currency is genuine. When a barcode sheet passes through the passageway, a first reading module or a second reading module of the barcode reading device reads widths and spaces of a plurality of bars on the barcode sheet.

An optical engine. In some embodiments, the optical engine includes an electronic interfacing component including: an upper surface having a plurality of conductors for forming a corresponding plurality of connections to a host board, a lower surface having a plurality of conductors for forming a corresponding plurality of connections to one or more optoelectronic elements, and a plurality of vias extending from the lower surface to the upper surface.

Some embodiments are directed to a multiplexed fiber sensor for a fiber optic hydrophone array, including a signal receiver configured to receive a signal from the fiber optic hydrophone sensor array and an interferometer. The interferometer is configured to produce a first signal component and a second signal component from the signal received from the hydrophone array, and also provided with a first polarisation controller configured to control the polarisation of the first signal component and a second polarisation controller configured to control the polarisation of the second signal component. A modulated carrier signal generator configured to generate a modulated carrier signal component based on the first signal component is also provided. A detector configured to output a demodulated output signal from the modulated signal component and the second signal component is included, wherein the modulated signal component and the second signal component output separately from the interferometer.

An optical transmission module includes a light emitting device for transmitting a first optical signal, a light receiving device for receiving a second optical signal, an optical fiber for guiding a third optical signal in which the first optical signal and the second optical signal are coupled, and an optical waveguide substrate having an optical waveguide made of first resin, wherein a groove formed on the optical waveguide substrate is provided with a prism having the optical fiber and a reflective face through which the first optical signal transmit, a first side face of the prism contacts a first wall face of the groove, and a second side face thereof contacts a second wall face of the groove.

Methods and systems for selectable parallel optical fiber and WDM operation may include an optoelectronic transceiver integrated in a silicon photonics die. The optoelectronic transceiver may, in a first communication mode, communicate continuous wave (CW) optical signals from an optical source module to a first subset of optical couplers on the die for processing signals in optical modulators in accordance with a first communications protocol, and in a second communication mode, communicate the CW optical signals to a second subset of optical couplers for processing signals in the optical modulators in accordance with a second communications protocol. Processed signals may be transmitted out of the die utilizing a third subset of the optical couplers. First or second protocol optical signals may be received from the fiber interface coupled to a fourth subset or a fifth subset, respectively, of the optical couplers.

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.

The invention provides an optical module which is less likely to be damaged, and can be assembled at low cost. The optical module comprises a housing having an electrical signal port for inputting and/or outputting an electrical signal and an optical signal port for inputting and/or outputting an optical signal, a first substrate arranged in the housing so as to connect to the electrical signal port, an optical fiber arranged in the housing so as to connect to the optical signal port, and a second substrate provided with an optical device which connects to the optical fiber to input the optical signal from the optical fiber and output the optical signal to the optical fiber, and arranged in the housing so as to electrically connect to the first substrate, and to be inclined with respect to a base plane of the housing.