Abstract: A system and method for controlling optical receiver operation in response to a received optic signal power level that includes providing an optic signal receiver having operation determined by one or more system settings. During operation, the optic signal is received and converted to an electrical signal. The electrical signal is evaluated to determine a power level of the electrical signal. Responsive to the power level of the electrical signal exceeding a first predetermined threshold, adjusting a first system setting and responsive to the power level of the received electrical signal decreasing below a second predetermined threshold, adjusting the first system setting. Then, responsive to the power level of the received electrical signal exceeding a third predetermined threshold, adjusting a second system setting and responsive to the power level of the received electrical signal decreasing below a fourth predetermined threshold, adjusting the second system setting.

Abstract: A free-space optical communication device includes an optical fiber bundle and one or more processors. The optical fiber bundle includes a central fiber connected to a first photodetector, and a plurality of surrounding fibers, each surrounding fiber connected to a corresponding second photodetector. The one or more processors are in communication with the first photodetector and each second photodetector. The one or more processors are also configured to receive a current or voltage generated at the first photodetector and each second photodetector and to determine a pointing accuracy of a beam received at the optical fiber bundle based on the current or voltage generated at the second photodetectors.

Abstract: An optical transceiver includes a housing and an optical receptacle; optical subassemblies each having a sleeve and being configured to perform a photoelectric conversion, the sleeve facing to the optical receptacle; inner fibers each connected to the sleeve one to one; and a tray having a holding part and a guiding part, the holding part holding the optical subassemblies in line, the guiding part being formed on both outer sides of the holding part and a folding back area on an opposite side of the optical receptacle. The guiding part includes a pair of passage parts. The inner fiber passes through one of the passage parts, the folding back area, and another of the passage parts in this order within the tray so as to face the optical receptacle again when the another of the passage parts is closer to the sleeve than the one of the passage parts.

Abstract: A connector has a case, a circuit board, a thermal diffusing unit, and a first heat sink. The circuit board is mounted in the case and has a heating source. The thermal diffusing unit abuts the inner surface of the case and the heating source of the circuit board. A heat transfer coefficient of the thermal diffusing unit is larger than a heat transfer coefficient of the case. The first heat sink abuts the thermal diffusing unit and is exposed from the case. A heat transfer coefficient of the first heat sink is larger than the heat transfer coefficient of the case. By the first heat sink abutting the thermal diffusing unit and exposed from the case, and the heat transfer coefficients of both the thermal diffusing unit and the first heat sink being larger than that of the case, the heat dissipation efficiency is improved.

Abstract: An optical module includes: a thermoelectric cooler with an upper surface and a lower surface, the lower surface fixed to the first surface of the conductive block, the thermoelectric cooler having a Peltier device therein configured to transfer heat between the upper surface and the lower surface; a metal layer laminated on the upper surface of the thermoelectric cooler; a ground wire connecting the first surface of the conductive block and the metal layer; a photoelectric device adapted to convert an optical signal and an electrical signal at least from one to another; a mounting substrate on which the photoelectric device is mounted, the mounting substrate fixed to the upper surface of the thermoelectric cooler with at least the metal layer interposed therebetween, the mounting substrate having a first wiring pattern electrically connected to the photoelectric device.

Abstract: The disclosure provides a communication system that includes sensors, a plurality of components, and processors. The sensors receive measurements related to a state of the communication system. The processors receive an indication of an amount of received power at a remote communication system and estimate a state of the plurality of components based on the received one or more measurements and the received indication. Using the indication and the estimated state, the processors determine whether the amount of received power is likely to fall below a minimum received power within a given time interval. When it is likely, the processors select an adjustment technique of a plurality of adjustment techniques for adjusting a data rate of the outbound signal and adjust a given component of the communication system using the selected adjustment technique to change the data rate of the outbound signal.

Abstract: A laser module includes: an optical fiber; a plurality of semiconductor laser devices that includes a first semiconductor laser device and a second semiconductor laser device; a condenser lens that condenses laser beams emitted from the plurality of semiconductor laser devices and optically couples the laser beams to the optical fiber; a first terminal that supplies a first drive current to the first semiconductor laser device; and a second terminal that supplies a second drive current that to the second semiconductor laser device. The second drive current is smaller than the first drive current.

Abstract: A Michelson interference optical fiber temperature sensor for detecting fringe contrast change is provided. It includes a light source, an optical fiber coupler connected to a first optical fiber and a second optical fiber, a coarse wavelength division multiplexer, a first photodetector, a second photodetector, a display device, and a processing circuit connected to the display device. The light source, optical fiber coupler and coarse wavelength division multiplexer are connected sequentially in that order. The coarse wavelength division multiplexer is connected to the first photodetector and the second photodetector individually. The first photodetector and the second photodetector are connected to the processing circuit. An end of the first optical fiber or the second optical fiber facing away from the optical fiber coupler is connected to a semiconductor. It has advantages of simple and fast manufacturing process, safe and reliable sensor, stable signal, low cost, high sensitivity and high precision.

Abstract: An optical network communication system includes an optical hub, an optical distribution center, at least one fiber segment, and at least two end users. The optical hub includes an intelligent configuration unit configured to monitor and multiplex at least two different optical signals into a single multiplexed heterogeneous signal. The optical distribution center is configured to individually separate the at least two different optical signals from the multiplexed heterogeneous signal. The at least one fiber segment connects the optical hub and the optical distribution center, and is configured to receive the multiplexed heterogeneous signal from the optical hub and distribute the multiplexed heterogeneous signal to the optical distribution center. The at least two end users each include a downstream receiver configured to receive one of the respective separated optical signals from the optical distribution center.

Abstract: A method for assembling a beam combiner array including providing an array block having a back wall, a front surface and a plurality of aligned channels extending from the back wall to the front surface, where a bore extends through the back wall and into each channel, and providing a lens array including a plurality of lenses. The method further includes securing the lens array to the front surface of the block so that one of the lenses is aligned with each channel and threading a separate hollow core fiber through one of the bores in the back wall so that an end of the fiber is positioned within the channel. The method also includes aligning each fiber to the lens array so that a beam that propagates down the fiber is emitted into the channel, focused by the lens and emitted from the array as a collimated beam.

Abstract: An optical access network includes an optical hub having at least one processor. The network further includes a plurality of optical distribution centers connected to the optical hub by a plurality of optical fiber segments, respectively, and a plurality of geographic fiber node serving areas. Each fiber node serving area of the plurality of fiber node serving areas includes at least one optical distribution center of the plurality of optical distribution centers. The network further includes a plurality of endpoints. Each endpoint of the plurality of endpoints is in operable communication with at least one optical distribution center. The network further includes a point-to-point network provisioning system configured to (i) evaluate each potential communication path over the plurality of optical fiber segments between a first endpoint and a second endpoint, and (ii) select an optimum fiber path based on predetermined path selection criteria.

Abstract: A time-of-flight sensor includes a light source to transmit periodic bursts light in a direction of one or more objects and an array of optical sensing elements to detect light reflected from the one or more objects and generate sensor data corresponding to the detected light. A distance calculator determines depth information of the one or more objects by determining a general phase shift of the reflected light relative to the transmitted light based on a first frame of the sensor data and a second frame of the sensor data, calculating an incremental phase shift of the reflected light relative to the transmitted light based on a linear relationship between the first frame and the second frame in relation to the general phase shift, and combining the general phase shift with the incremental phase shift to determine an actual phase shift of the reflected light relative to the transmitted light.

Abstract: Various embodiments of a micro-disc modulator as well as a silicon photonic device and an optoelectronic communication apparatus using the micro-disc modulator are described. In one aspect, a device includes a SOI substrate and a silicon photonic structure formed on a primary surface of the SOI substrate. The semiconductor substrate includes a silicon waveguide and a micro-disc modulator. The micro-disc modulator is adjacent to the silicon waveguide and has a top surface substantially parallel to the primary surface of the SOI substrate. The top surface of the micro-disc modulator includes one or more discontinuities therein. The micro-disc modulator may be a multi junction micro-disc modulator having two vertical p-n junctions with a single resonance frequency to achieve high-speed modulation and low-power consumption.

Abstract: A photonics device includes a silicon wafer including an upper surface region, a trench region, and a ridge structure. The ridge structure electrically isolates the upper surface region from the trench region. A laser diode chip flip-bonded onto the silicon wafer includes an electrode region bonded with the upper surface region, a gain region bonded with the trench region, and an isolation region bonded with the ridge structure. The isolation region electrically isolates the gain region from the electrode region. A conductor layer arranged between the silicon wafer and the laser diode chip includes a first section electrically connecting the gain region to a first electrode of the photonics device and a second section configured to electrically connect the electrode region to a second electrode of the photonics device. The first section is electrically isolated from the second section by the isolation region.

Abstract: Processing a received optical signal in an optical communication network includes equalizing a received optical signal to provide an equalized signal, demodulating the equalized signal according to an m-ary modulation format to provide a demodulated signal, decoding the demodulated signal according to an inner code to provide an inner-decoded signal, and decoding the inner-decoded signal according to an outer code. Other aspects include other features such as equalizing an optical channel including storing channel characteristics for the optical channel associated with a client, loading the stored channel characteristics during a waiting period between bursts on the channel, and equalizing a received burst from the client using the loaded channel characteristics.

Abstract: An optical pick and place machine that includes a self-calibrating optical controller for error feedback based optical placement of optical components using active alignment is described. The optical controller can include a loopback mode to generate a baseline value of light generated by a light source and measured by a photodetector within the optical controller. The optical controller can further include an active alignment mode in which the light is coupled from the pick and place machine to the optical device on which the component is placed. The optical coupling of the placed component can be evaluated against the baseline value to ensure that the optical coupling is within specification (e.g., within a prespecified range).

Abstract: Provided is an optical fiber connection component in which an optical waveguide of a planar lightwave circuit and an optical fiber can be connected after a process using SMT and reflow mounting technology. The optical fiber connection component includes: a plurality of fiber guide holes into which optical fibers are insertable at intervals equal to intervals of a plurality of optical waveguides of the planar lightwave circuit; and grooves for demarcating an area provided with the plurality of fiber guide holes and an area coated with an adhesive in an end surface to be joined with the planar lightwave circuit. The plurality of optical waveguides and the plurality of fiber guide holes are respectively aligned and fixed to the planar lightwave circuit with the adhesive in advance.

Abstract: Pluggable optical transceiver modules are described herein that are specifically configured to preclude use of fiber jumpers inside of the module. Pluggable optical transceiver modules implement a rigid-plane jumper that provides an opto-mechanical interface between an external fiber cable (attached to the pluggable optical transceiver module) and the optical transceiver in a manner that does not require the fiber jumper, while ensuring reduced optical loss. In some embodiments one or more rigid waveguide plates act as an opto-mechanical coupling between the external fiber cable and on-board opto-electrical components (e.g., optical transceiver). For example, the rigid waveguide plates are coupled to a faceplate connector, and a CWDM block that is in turn optically coupled to the optical socket. In some embodiments, the CWDM block is directly attached to the rigid waveguide plates. In some embodiments, the CWDM block is indirectly attached to the rigid waveguide plates using a half periscope.

Abstract: An optical module includes: a board that is accommodated in a housing and in which a through hole is formed; a metal plate that is bonded to an area of the board including the through hole; a component that is mounted on one surface of the metal plate and is arranged inside the through hole; and a thermal-conductive member that is arranged on another surface of the metal plate and transmits heat generated by the component to the housing.

Abstract: The present disclosure is generally directed to a component bridge that couples to a feedthrough device to provide additional component mounting surface area within a TOSA housing, and preferably, within a hermetically-sealed TOSA housing. The component bridge includes a body that defines a component mounting surface to couple to electrical components, e.g., one or more filtering capacitors, and a notched portion to provide an accommodation groove. The component bridge includes at least one projection/leg for coupling to a mounting surface of a feedthrough device. The accommodation groove of the component bridge allows for other electrical components, e.g., RF traces, to be patterned/disposed on to the mounting surface and extend at least partially through the accommodation groove while remaining electrically isolated from the same. Accordingly, the component bridge further increases available component mounting surface area for existing feedthrough devices without necessity of re-design and/or modification.