Abstract: A method of calibrating a collimating lens system includes transmitting, using an optical transmitter, a beam out of an optical fiber and through a collimating lens of the collimating lens system. The beam is reflected off a perfect flat mirror positioned at an output of the collimating lens and back towards the collimating lens, and received, via the collimating lens, at a power meter connected to the optical fiber. The method also includes adjusting a position of a tip of the optical fiber proximal to the collimating lens while tracking a power reading using the power meter, selecting a calibration position of the optical fiber corresponding to a highest power reading, and securing the optical fiber relative to the collimating lens using the calibration position.

Abstract: A passive optical network having an optical-signal monitor configured to monitor carrier-wavelength drifts during optical bursts transmitted between the optical line terminal and optical network units thereof. In an example embodiment, the optical-signal monitor uses heterodyne beating between two differently delayed portions of an optical burst to generate an estimate of the carrier-wavelength drift during that optical burst. The passive optical network may also include an electronic controller configured to use the estimates generated by the optical-signal monitor to make configuration changes at the optical network units and/or implement other control measures directed at reducing to an acceptable level the amounts of carrier-wavelength drift during the optical bursts and/or mitigating some adverse effects thereof.

Abstract: An optical module package may include a package substrate, an interposer on the package substrate, and a first semiconductor chip and a second semiconductor chip on the interposer. The interposer may include a silicon substrate having a first surface, which is adjacent to the package substrate, and a second surface, which is opposite to the first surface and adjacent to the first and second semiconductor chips, a penetration electrode penetrating the silicon substrate, a lower interconnection layer disposed on the first surface of the silicon substrate, and an optical waveguide, a first optical module, and a second optical module disposed in a lower portion of the lower interconnection layer. The first optical module may include a light source providing light into the optical waveguide, and the second optical module may include a photodetector receiving the light.

Abstract: In an optical module, optical signal output having satisfactory waveform and intensity can be obtained. A differential transmission line includes a first differential transmission line, which has a first characteristic impedance and is connected to a drive IC, a second differential transmission line, which has a second characteristic impedance and is connected to a light output element, the second characteristic impedance being smaller than the first characteristic impedance, and connecting portions configured to connect the first differential transmission line and the second differential transmission line in series with each other. A resistive element is arranged between the connecting portions. The resistive element has a resistance value that is set to a value with which an absolute value of a reflection coefficient for a signal traveling from the second differential transmission line side to the first differential transmission line side is 0.10 or less.

Abstract: In an example method, an edge transceiver receives a first message from a hub transceiver over a first communications channel of an optical communications network, including an indication of available network resources on the optical communications network. The edge transceiver transmits, over a second communications channel of the optical communications network, a second message to the hub transceiver, including an indication of a subset of the available network resources selected by the edge transceiver. The edge transceiver receives, from the hub transceiver, a third message acknowledging receipt of a selection by the edge transceiver and a fourth message confirming an assignment of the selected subset of the available network resources to the edge transceiver. The edge transceiver transmits, using the selected subset of the available network resources, data via the hub transceiver.

Abstract: Optoelectronic systems and methods of assembly thereof are described herein according to the present disclosure. An example of an optoelectronic described herein includes a substrate and an interposer coupled to the substrate including one or more optical emitters and one or more photodetectors to be mounted thereto. The interposer is fabricated with one or more mechanical datums located on the interposer with respect to flip chip pads to position and couple the optical emitters and photodetectors to the interposer. The optoelectronic system also includes an optical connector and an optical socket that includes one or more mechanical datums corresponding to the mechanical datums of the interposer. The optical socket is configured to align the optical connector with the optical emitters and the photodetectors when the optical socket is coupled to the substrate and the optical connector is received within the optical socket.

Abstract: An optical transceiver includes a housing, a heat dissipation module and an optical communication module. The heat dissipation module includes a first heat conductive component and a second heat conductive component accommodated in the housing. The first heat conductive component and the second heat conductive component are two independent components, and the first heat conductive component thermally contacts the second heat conductive component. The optical communication module is accommodated in the housing and thermally contacts the heat dissipation module.

Abstract: Even in a case where light sources at an optical transmission-side and an optical reception-side are made into a common light source, a optical transmission function and an optical reception function are enabled to be used at a time.

Abstract: Heat dissipation and electric shielding techniques and apparatuses are disclosed to enable the operation of OSFP modules at higher bandwidths. OSFP compatible techniques are discussed including the use of water cooling, addition of heat pipes, use of intercoolers, air-fins and air-foils, optimization of cooling fins, use of vapor chambers are discussed.

Abstract: An optical network is provided that includes at least one strand of a plurality of strands of optical fiber optically connected to a first fiber distribution hub and an access terminal. The at least one strand optically is also connected to a second fiber distribution hub and the access terminal. The at least one strand thus provides a full duplex optical path in a first direction from the first fiber distribution hub to the access terminal and in a second direction from the second fiber distribution hub to the access terminal.

Abstract: A display apparatus is disclosed. The display apparatus includes: an optical communication interface configured to communicate with an electronic device through an optical cable; and a processor for, when an optical signal including at least one signal among an image signal and a sound signal is received from the electronic device through the optical communication interface, measuring a strength of the received optical signal, and controlling an operation of the display apparatus related to a state of the optical cable, on the basis of the measured strength of the optical signal.

Abstract: An example system includes a hub transceiver and a plurality of edge transceivers. Each of the edge transceivers has one of several types of configurations for communicating with an optical communications network. Each type of configuration is associated with a different responsive optical subcarrier assignment protocol. The hub transceiver is operable to determine a plurality of optical subcarriers available for assignment by the hub transceiver to the plurality of the edge transceivers for use in communicating over the optical communications network, and assign, to each of the edge transceivers, a respective subset of the optical subcarriers. Assignment includes, determining that each of the edge transceivers has a particular type of configuration, and assigning a respective subset of the optical subcarriers to the edge transceiver according to the optical subcarrier assignment protocol associated with the that type of configuration.

Abstract: Examples include systems and methods for communicating temperature variation information of a transmitter resonator to a receiver resonator in an optical communication system. Some examples provide a transceiver module that includes a transmitter resonator to transmit optical signals emitted from a light source, a photodetector coupled to the transmitter resonator to detect the optical signals transmitted by the transmitter resonator and generate a photocurrent, and a controller to receive the photocurrent from the photodetector, determine temperature variation information of the transmitter resonator from the photocurrent, and encode the temperature variation information in an outgoing data stream transmitted via the transmitter resonator.

Abstract: When, in each of optical submarine relay apparatuses of the optical submarine cable system in which the optical submarine relay apparatus is arranged in each relay section of an optical submarine cable, a Laser Diode (LD) driving device for excitation (11) for outputting an excitation light to excite an optical amplifier is configured to include a plurality of LD driving circuits whose requiring currents are different from one another, which are, for example, a first LD driving circuit (111a) of a required current Ia and a second LD driving circuit (111b) of a required current (Ib) therein, a power feeding line for feeing power to the first LD driving circuit (111a) and a power feeding line for feeing power to the second LD driving circuit (111b) are configured to be connected in parallel to each other.

Abstract: Aspects relate to a photonic processing system, a photonic processor, and a method of performing matrix-vector multiplication. An optical encoder may encode an input vector into a first plurality of optical signals. A photonic processor may receive the first plurality of optical signals; perform a plurality of operations on the first plurality of optical signals, the plurality of operations implementing a matrix multiplication of the input vector by a matrix; and output a second plurality of optical signals representing an output vector. An optical receiver may detect the second plurality of optical signals and output an electrical digital representation of the output vector.

Abstract: An example system includes a plurality of hub transceivers and a plurality of edge transceivers. A first hub transceiver is operable to determine that the first hub transceiver is configured to assign a first subset of network resources to a first subset of the edge transceivers for communication over an optical communications network, and determine that a second hub transceiver is configured to assign a second subset of network resources to a second subset of the edge transceivers for communication over the optical communications network. The first hub transceiver is also operable to determine that the first subset of network resources overlaps the second subset of network resources, and in response, transmit a notification of the overlap to a control module of the optical communications network.

Abstract: Constellations of distributors interconnect access nodes to form a vast contiguous network. The access nodes are generally geographically spread and the constellations are generally geographically spread, however the distributors within each constellation are collocated. The access nodes are arranged into access groups. The access nodes of each access group interconnect through selected constellations, with each access node having a wavelength-division-multiplexed (WDM) link to each of the selected constellations, to form a three-stage network. The three-stage networks corresponding to the access groups are mutually fused so that an access node of any three-stage network has multiple paths, each traversing one distributor, to each other access node of the same three-stage network and a path to each other access node of the entire network traversing one distributor. The distributors are preferable configured as fast optical switches.

Abstract: A faceplate optical sub-assembly is provided for accommodating a plurality of optical receptacles mounted in a faceplate of a computing device. The faceplate optical sub-assembly accommodates one or more optical receptacle housings having optically-connected front and rear optical bays. A collar having a single aperture surrounds the one or more optical bays, and a shell structure comprised of a pair of interlocking sub-shells engages on the rear of the collar. A gasket is disposed between the collar and the shell structure. The collar, gasket, and shell structure provide electromagnetic interference (EMI) shielding for optical connections made between optical fibers inserted in the front and rear optical bays, and rigidly engage the plurality of optical receptacle housings. The single aperture of the collar and the multi-part shell structure allows for insertion of a fiber jumper assembly into the rear bays of the faceplate optical sub-assembly prior to insertion into a faceplate of a computing device.

Abstract: An example system includes a hub transceiver and a plurality of edge transceivers. The hub transceiver is operable to transmit, over a first communications channel, a first message to each of the edge transceivers concurrently, including an indication of available network resources on an optical communications network. Each of the edge transceiver is operable to transmit, transmit, over a second communications channel, a respective second message to the hub transceiver including an indication of a respective subset of the available network resources selected by the edge transceiver for use in communicating over the optical communications network. Further, the edge transceiver is operable to receive, from the hub transceiver, a third message acknowledging receipt of a selection and a fourth message confirming an assignment of the selected subset of the available network resources to the edge transceiver.

Abstract: Techniques are described for implementing an out-of-band communication channel used to exchange control channel information in sub-carrier-based optical communication systems. In an example implementation, an optical communication system includes a primary transceiver, a component, and secondary transceivers. The primary transceiver is operable to supply first optical subcarriers to an optical communication path, the first optical subcarriers being amplitude modulated at a first frequency to carry first control information and amplitude modulated at a second frequency to carry second control information. The component is operable to be coupled to the optical communication path and includes circuitry operable to detect the first control information. The secondary transceivers are coupled to a terminal end of the optical communication path. At least one of the secondary transceivers is operable to detect the second control information and block the first control information.