Abstract: According to one example embodiment, a form factor adapter module may include a small form factor (SFF) host connector, an X2 or XENPAK edge finger connector, and a serial to XAUI transceiver. The SFF host connector may be configured receive a small form factor pluggable (SFP or SFP+) module and to transmit and receive data according to a Serial Gigabit Media Independent Interface (SGMII) or Serializer-deserializer Framer Interface (SFI) protocol. The X2 or XENPAK edge finger connector may be configured to mate with an X2 or XENPAK edge finger socket and to transmit and receive data according to a Ten Gigabit Ethernet Attachment Unit Interface (XAUI) protocol. The serial to XAUI transceiver may be coupled to both the SFF host connector and the X2 or XENPAK edge finger connector. The serial to XAUI transceiver may be configured to convert data between the SGMII or SFI protocol and the XAUI protocol.

Abstract: Where an integrated monitoring and controlling unit is to control an optical add-drop unit so as to cause transmit signals from the optical transceiver of a first optical node to be received by the optical transceivers of plural different optical nodes, this purpose can be achieved by an optical transmission system provided with an alarm inhibiting device that can inhibit the optical transceiver, which is a source of transmission, from issuing any unexpected alarm.

Abstract: In one embodiment an apparatus is provided for supporting 100GBASE-SR10 data communications over an optical link. The apparatus includes a receptacle configured to receive an optical fiber cable comprising at least 10 OM3 optical fibers, the receptacle including individual channels for receiving respective ones of the at least 10 optical fibers, a plurality of optical receiver/transmitter pairs, and a plurality of wave division multiplexers configured to couple individual ones of the channels with respective ones of the optical receiver/transmitter pairs.

Abstract: A clock tracing method includes: determining a shortest path to each source network element, and selecting a best source network element among all the source network elements; determining a shortest path to the best source network element according to the shortest path, using the shortest path to the best source network element as a clock tracing path if the shortest path to the best source network element is different from an old clock tracing path and a traceable message is received, and using the clock tracing path for tracing clocks; and using the old clock tracing path for tracing clocks if the shortest path to the best source network element is the same as the old clock tracing path or no traceable message is received. A clock tracing apparatus and a network element are also provided. The provided clock tracing method, apparatus and network element may ensure high-quality clock transmission, and the fast performance of automatic clock tracing.

Abstract: A system is disclosed for an improved ROSA that has increased sensitivity for permitting greater numbers of ONTs to be connected to an optical network per defined transmission line distances. The ROSA configuration includes a digital optical module with improved performance characteristics. This digital optical module has replaced a conventional photodiode with a PIN detector that is coupled with the TIA. The resulting digital optical module containing this PIN/TIA configuration when incorporated in a ROSA provides a single ROSA solution that will meet or exceed the ITU/IEEE FTTx standards for short and long distances under substantially all operating conditions.

Abstract: The present invention provides a transceiver for optical transmission in which noise can be sufficiently suppressed and a method for the same using a simple configuration. The transceiver includes an optical transmitter module in which a low frequency obtained by boosting and filtering a power-source voltage is superimposed onto and LD drive current.

Abstract: Pluggable ONU transceiver modules are disclosed that include an optical connector configured to connect to an optical network. The pluggable ONU transceiver modules further includes a transmit line including a laser driver and a laser. The pluggable ONU transceiver modules further includes a first receive line including a first optical receiver and a first post amplifier. The pluggable ONU transceiver modules further includes a second receive line including a second optical receiver and a second post amplifier. The pluggable ONU transceiver modules further includes a combined input/output (I/O) and video contacts electrically coupled to the laser driver, first post amplifier, and second post amplifier.

Abstract: Provided is an optical interconnection system that transmits and receives a three-level signal. The optical interconnection system includes a first and a second optical interconnection device that transmits and receives a two-level signal, and a synthesizer that outputs a three-level signal by synthesizing signals from the first and second optical interconnection devices. The optical interconnection system may transmit and receive a three-level signal while using an optical interconnection device that interconnects a two-level signal.

Abstract: Methods for authenticating an optical transceiver module to a host are disclosed. The transceiver comprises a receive signal line for transferring data from the transceiver to the host and a transmit signal line for transferring data from the host to the transceiver in preparation for transmission to a communications network. The transceiver includes a controller having a processor in communication with the host, and a first memory register assignable by the processor. A consolidated laser driver/post amplifier is also included and features a pattern generator and a data switch. The pattern generator produces a string of bit values that serve as an authenticating data portion. The data switch selectively inputs the authenticating data portion to the receive signal line of the transceiver according to the state of the first memory register, enabling the authenticating data portion to be received by the host, thereby authenticating the transceiver.

Abstract: The disclosure relates to optical fiber transmission systems, and in particular, pertains to the transceiver cards in an optical fiber transport system. In particular the disclosure teaches an improved transceiver card architecture that allows high density, flexibility and interchangeability of functionality.

Abstract: One embodiment provides an ONU that includes an optical interface coupled to an optical transceiver, which is configured to transmit optical signals to and receive optical signals from an OLT through the optical interface. The ONU also includes an ONU chip coupled to the optical transceiver and configured to communicate with the OLT through the optical transceiver. The ONU further includes an Ethernet interface coupled to the ONU chip and a power management module configured to provide power to the ONU chip and the optical transceiver using power delivered from a CPE through the Ethernet interface. In addition, the ONU includes a circuit board to which the optical transceiver, the ONU chip, and the power management module are attached, and a wall-mountable fixture, wherein the front side of the fixture includes an opening for the Ethernet interface, and wherein the back side of the fixture holds the circuit board.

Abstract: A method is provided to lower the overall power consumption of small form-factor pluggable (SFP) transceivers. The method includes receiving an indication to operate the SFP transceiver in a low power mode, and setting the SFP transceiver to a low power mode in response to the indication by at least switching off a thermal electric cooler (TEC) that controls a temperature of a laser diode of the SFP transceiver. The proposed method may be implemented whenever a reach is not more than a predetermined distance, for example, 65 kilometers. At such reduced distances, the TEC of the SFP transceiver can be switched off while still guaranteeing link functionality. The instant low power mode has the benefit of reducing the power consumption of the SFP transceiver so that, for example, host platforms with lower power delivery budgets can support the SFP transceiver for at least some applications.

Abstract: Described herein is an apparatus for improving bandwidth of a transceiver system e.g., a Universal Serial Bus (USB) micro-B connector. The apparatus comprises a first pair of lens units, each lens unit of the pair positioned on either side of an input-output (I/O) bus interface, the pair of lens units to send and receive optical signals respectively; a first housing to shield the first pair of lens units and for physically coupling the I/O bus interface and the first pair of lens units to a receptacle; and a key to grasp the first housing and to lock the first housing with the receptacle.

Abstract: Systems and method for using a direct connect RF pin configuration for an ONU transceiver module to connect directly to an external component. The ONU module communicates with an optical network. The ONU module further includes an RF interface and a direct connect RF pin configuration to communicate using RF signals. In one embodiment, the direct connect RF pin configuration includes two ground pins and a data pin which are spaced apart and directly connected to a PCB of the ONU. The opposing ends of the pins are directly connected to a PCB of an external component, such as an ONU host box. The pins are thus spaced apart such that they do not impede each others' function and available for direct connection to the external component.

Abstract: A passive optical network transceiver includes an avalanche photodiode, a bias voltage generator for supplying a bias voltage to the avalanche photodiode, a temperature detector for measuring the operating temperature of the avalanche photodiode, a memory for storing one reference bias voltage and a processing circuitry to process the value of the measured operating temperature and the reference bias voltage to generate a control signal for controlling the bias voltage generator to adjust the bias voltage supplied by the said bias voltage generator.

Abstract: A bi-direction optical module with an arrangement to reduce the crosstalk noise is disclosed. The optical module comprises a laser diode (LD) driven by a differential signal and a photodiode (PD) on a single package. The PD is mounted on a position where the electrical potential measured from respective interconnections connected to the anode and to the cathode of the LD becomes the midpoint of the interconnections. The capacitances with respect the stem, where the LD and the PD are mounted thereon, viewed from the anode and the cathode of the LD becomes substantially equal to each other, or distances from the PD to respective interconnections are adjusted depending on the length of the interconnection facing the PD. Twisting the interconnections to the LD may be effective to reduce the crosstalk.

Abstract: A topology for optical transceiver components comprises an electrical signal interface stage, a data timing and signal reformatting stage, and an optical fiber interface stage. Unlike transceiver components known in the art, functions having signals with the most jitter are partitioned into the electrical signal interface stage. Data timing functions, for example retiming or clock and data recovery, are included in the data timing and reformatting stage. Output jitter from the data timing and signal reformatting stage is approximately equal to jitter in a clock signal, enabling use of semiconductor components having jitter greater than SONET limits and thereby increasing a value of production yield. Embodiments of the invention are well suited for 40 G transmitters and receivers in nonconnectorized surface mount packages. 40 G transceivers built in accord with the invention are expected to have lower cost, smaller size, and higher production yield than 40 G transceivers known in the art.

Abstract: An optical receiver includes a light receiving element for converting an optical signal to an electrical signal having a first bandwidth and an amplifier for amplifying the electrical signal. The amplifier has a first gain response that yields a second bandwidth that is less than the first bandwidth. The optical receiver also includes an equalizing circuit operationally coupled to the amplifier. The equalizing circuit has a second gain response that compensates for the first gain response of the amplifier so that a substantially constant net gain is imparted by the amplifier and the equalizing circuit to the electrical signal over the first bandwidth.

Abstract: A process and system are disclosed for supplying electrical energy to a device located in a room housing an imaging system (such as an MRI system, for example), wherein the room is shielded from external electromagnetic fields. Certain embodiments of the present invention provide systems and processes for emitting electromagnetic radiation in the wavelength range of the light spectrum from at least one light emission device. Embodiments of the present invention further provide a process and system for transforming the electromagnetic radiation into electrical energy using at least one transducer device located in the room, and supplying the electrical energy to the device so as to minimize interfering electromagnetic fields within the room.

Abstract: An optical transmission apparatus includes a first transceiver unit coupled to a first node, a second transceiver unit coupled to a second node, an electrical signal processing unit provided between the transceiver units, a first transmission clock generating unit configured to generate a clock used by the second transceiver unit based on a clock of a signal arriving through the first node, a second transmission clock generating unit configured to generate a clock used by the first transceiver unit based on a clock of a signal arriving through the second node, a selector configured to select an output clock of the first transmission clock generating unit at a time of optical input interruption at the second node, and a frequency dividing unit configured to produce a frequency-divided clock obtained by dividing frequency of the output clock selected by the selector for provision to the second transmission clock generating unit.

Abstract: Exemplary embodiments of the invention relate to an optical transceiver module having a status indicator assembly, wherein the status indicator assembly is configured to visually display the operational status of the transceiver transmitter and receiver components. The operational status is accessible while the transceiver operates in conjunction with an external host and may be ascertained in real time without interrupting normal transceiver operation or suspending the transmission of data over optical fibers.

Abstract: An optical receiver assembly that is configured to avoid the introduction of feedback in an electrical signal converted by the assembly is disclosed. In one embodiment, an optical receiver assembly is disclosed, comprising a capacitor, an optical detector provided with a power supply being mounted on a top electrode of the capacitor, and an amplifier mounted on the reference surface. The assembly further includes an isolator interposed between the reference surface and the capacitor, wherein the isolator includes a bottom layer of dielectric material that is affixed to a portion of the reference surface, and a metallic top plate that is electrically coupled both to a ground of the amplifier and to the capacitor. This configuration bootstraps the amplifier ground to the amplifier input via the photodiode top electrode of the capacitor to cancel out feedback signals present at the amplifier ground.

Abstract: Disclosed is an optical communication device, including: a light source that outputs an optical signal; a modulation unit that modulates transmission data and inputs it to the light source; a storage unit that holds a set value of the light source or the modulation unit; a power consumption adjustment unit that, according to an instruction, acquires the set value from the storage unit, optimizes power consumption within a predetermined range of transmission characteristics, and determines a set value; and a control unit, being provided the determined set value, that controls power consumption of at least one of the light source and the modulation unit based on the provided set value.

Abstract: Techniques are disclosed for providing bi-directional data services involving a plurality of wavelengths. The data services may be hybrid in nature, including both digital and analog data signals. The techniques may be implemented, for instance, in an optical module, and allow one or more wavelengths to pass-through while other wavelengths are terminated or otherwise diverted. In one example embodiment, the techniques are embodied in a quad-port optical module having two input/output (I/O) ports and pass-through capability for at least one of the wavelengths, add capability for at least one wavelength, and drop capability for at least one wavelength. The module may further include transmit and/or receive capability for one or more signal types. The module can be operatively coupled with a bidi device or other suitable transceiver, to provide modular transmit-receive capability for a desired signal type.

Abstract: An optical transceiver includes a substrate, a plurality of laser components, a bracket and a plurality of lenses. The substrate defines a plurality of through holes, a plurality of receiving grooves and at least two fixing holes. The laser components are received in the plurality of receiving grooves and installed on the substrate. The bracket includes a top cover with an upper surface and one or more side walls. The one or more sidewalls include at least two positioning posts and one or more fixing surfaces. The positioning posts are engaged with the fixing holes to position the bracket to the substrate. The fixing surfaces are affixed on the substrate by an adhesive. The one or more sidewalls define one or more through channels extending from the one or more fixing surface to the upper surface. The lenses are installed on the bracket and correspond to the laser components.

Abstract: A current mirror circuit and an optical receiver circuit implementing with the current mirror circuit are disclosed. The current mirror circuit provides two MOSFETs and two differential amplifiers. The MOSFETs are operated under the same bias condition even the power supply voltage decreases due to the virtual short-circuit characteristic between two inputs of the differential amplifier. One of the differential amplifiers provides a variable gain and output impedance characteristic to stabilize the feedback loop formed by this differential amplifier and one of the MOSFETs.

Abstract: An HDMI optical transceiver comprises an optical bench, at least one light emitter disposed on the optical bench, at least one first fiber assembly, at least one photodetector disposed on the optical bench and at least one second fiber assembly. The optical bench has a surface, at least one first groove recessed from the surface and at least one second groove recessed from the surface. The light emitter has a light-emitting surface. The first fiber assembly is disposed at the first groove of the optical bench and comprises a first sleeve fixed at the first groove and a first optical fiber which is disposed in the first sleeve and aligned with the light-emitting surface. The photodetector has a light-receiving surface. The second fiber assembly is disposed at the second groove of the optical bench and comprises a second sleeve fixed at the second groove and a second optical fiber which is disposed in the second sleeve and aligned with the light-receiving surface.

Abstract: A bi-directional optical module with an improved optical crosstalk between the transmitter unit and the receiver unit is disclosed. The optical module provides the LD, the PD, the WDM filter secured with the block, and the package with the co-axial shape. The block provides a slant surface, where the WDM filter is secured thereon, the bottom surface facing the PD mounted on the package, and an aperture connecting the slant surface and the bottom surface. The PD is enclosed within a space formed by the bottom surface and the primary surface, which electrically and optically isolates the PD from the LD.

Abstract: According to an embodiment of the present disclosure, a bidirectional communications system includes a first non-blocking network including a bidirectional optical switch, a plurality of nodes, a plurality of optical transceivers connected between the bidirectional optical switch and the plurality of nodes, each optical transceiver including a transmitter, a receiver and an optical combiner, and a second network connected to at least one of the nodes and the at least one at least one bidirectional optical switch for control of a crossconnect.

Abstract: The object of the present invention is to provide an optical communication module in which the pin arrangement can be applied flexibly, and an optical communication system in which this optical communication module is used. The present invention provides an optical communication module which has an outer shape formed based on normal standards and which is able to communicate with a host-side circuit board, etc. to which it is fitted, via a predetermined communication interface; wherein the optical communication module exchanges input/output I/F information with the circuit board, etc., and the communication interface can be switched to another communication interface based on these input/output I/F information.

Abstract: One embodiment includes an integrated boot and release slide having a release slide and a boot. The release slide includes a main body, a plurality of arms, and a plurality of coupling structures. The arms extend from a first end of the main body. The coupling structures extend from a second end of the main body opposite the first end. The boot is overmolded over the coupling structures of the release slide and defines a cavity configured to slidably receive a communications cable.

Abstract: An operational optical transceiver configured to update operational firmware using an optical link of the transceiver. The optical transceiver includes at least one processor and a system memory capable of receiving firmware. The optical transceiver receives an optical signal over the optical link containing the update firmware. The optical transceiver then recovers the firmware from the optical signal. Finally, the optical transceiver provides to the system memory the recovered firmware, which when executed by the at least one processor alters the operation of the transceiver.

Abstract: In an optical transmission module having a communication module which is freely movable in a case, when a tensile force is generated on an optical cable after connection of an optical transmission module, optical coupling surface and an optical axis center follow each other and thus stable optical transmission can be constantly performed.

Abstract: The present invention provides Ethernet extension and demarcation functionality through a Multi-Source Agreement (MSA) pluggable transceiver in a customer or remote device. The pluggable transceiver is configured to frame an Ethernet client signal and to provide OAM&P functionality, such as with G.709 framing. The pluggable transceiver operates within existing multi-source agreement (MSA) specifications. Accordingly, the pluggable transceiver can operate in any customer device compliant to the MSA specifications. Additionally, the framing and OAM&P functionality are transparent to the customer device, but instead utilized by a service provider for demarcation functionality, eliminating the requirements for external demarcation equipment and for external transponders.

Abstract: The present invention provides systems and methods for integrated framing functionality; optical layer operations, administration, maintenance, and provisioning (OAM&P); forward error correction (FEC); data encapsulation; and performance enhancement support in SFP optical transceiver modules. An SFP pluggable transceiver is configured to frame a client signal and to provide OAM&P functionality, such as with G.709 framing. The SFP pluggable transceiver operates within existing multi-source agreement (MSA) specifications for SFP. Accordingly, the pluggable transceiver can operate in any customer device compliant to the MSA specifications.

Abstract: Methods for managing an optical network through out-of-band communication between optical transceiver modules in a heterogeneous network fabric are disclosed. The disclosed methods include methods for performing fabric discovery, communicating error messages, detecting intrusion. Methods are also disclosed for communicating between transceivers of differing protocol versions and memory capacity.

Abstract: An optical network device of a passive optical network is introduced. The optical network device includes a light source, a control unit, and a variable optical attenuator. The light source can generate an optical signal. The control unit can generate a magnetic signal based on a control signal capable of providing information relating to a distance between the optical network device and an optical line termination. The variable optical attenuator can adjust a polarization angle of the optical signal based on the magnetic signal.

Abstract: A system is disclosed. The system includes a first optical transceiver having a first set of transmitters and a first set of receivers and a second optical transceiver having a second set of transmitters coupled anti-symmetrically to the first set of receivers of the first optical transceiver and a second set of receivers coupled anti-symmetrically to the first set of transmitters of the first optical transceiver.

Abstract: The present invention relates to a frequency offset compensating apparatus and method, and an optical coherent receiver.

Abstract: A small form factor pluggable (SFP) optical transceiver module and method for performing optical communications are provided. The SFP optical transceiver module has a housing to which a duplex receptacle is secured. The duplex receptacle has a C-shaped opening, the upper and lower portions of which are defined by upper and lower flexible retaining elements for receiving and retaining a duplex optical connector therein. An electrical assembly of the module is secured within the transceiver module housing. The electrical assembly comprises a PCB, the back end of which is configured as a plug end for removably plugging the PCB into a receptacle of an external communications management system.

Abstract: A system is provided for implementing PCI Express protocol signals over an optical link. A transmission circuit is used to provide an electrical-to-optical conversion, a receiving circuit provides an optical-to-electrical conversion, and a sideband circuit is used to provide and receive control information.

Abstract: A data transmission system and method are provided. The data transmission system includes a first link partner and an optical transceiver unit. The first link partner includes a controller. When the first link partner is in an abnormal operation mode, the controller controls the first link partner to exit from the abnormal operation mode. The optical transceiver unit is coupled between the first link partner and a second link partner and performs data transmission between the first link partner and the second link partner. According to the data transmission system and method, one link partner can accurately detect whether another link partner is coupled to the one link partner through an optical transceiver unit. Accordingly, data transmission between the two link partners can be stably performed through the optical transceiver unit.

Abstract: A method is disclosed, where the access time to the extended memory space may be shortened in an optical transceiver coupled with a host device through I2C bus. The optical transceiver may respond to extra slave addresses in addition to the base slave address which is normally defined only in a state where the security level is in “privileged level”. The extra slave address is assigned to other devices participated in the I2C bus, but in the production or in the delivery inspection of the transceiver, the extra slave address may be assigned only to the target optical transceiver.

Abstract: A method to reduce a peak power consumption of an optical transceiver including a thermoelectric cooler (TEC) is disclosed. The transceiver includes three power units, one of which powers the temperature control unit including the TEC driver and the TEC, second one of which powers the transmitter unit including an LD and an LD driver, and the last of which powers the receiver unit. Once the transceiver is set in the host system, the transceiver first activates the first and second power units to start up the temperature control unit and the transmitter unit, and subsequently, the transceiver sets up the third power unit after the temperature of the LD is stabilized at a target temperature.

Abstract: To provide a low-cost and fine-property bidirectional optical transmitting/receiving module and the like, which include a de-multiplexing device that uses a V-letter shaped optical waveguide and a dielectric multilayer filter. Formation of an end face where the dielectric multilayer film is formed and separation of optical modules are performed in separate steps, and the end face at the intersection of the V-letter shaped optical waveguide, on which the dielectric multilayer filter is formed, is formed by dry etching to achieve high smoothness. Further, a cutting face of the optical module is set at a position that is isolated from the end face at least by 3 ?m. Through the above, the smooth end face is protected from roughness of the cutting face caused by a light emitting element separating step, and the dielectric multilayer filter is formed on that end face.

Abstract: A mechanism that enables an optical transceiver to configure memory on a per-segment basis. The optical transceiver includes a processing entity, system memory and a memory configuration table. The memory configuration table is comprised of configuration entries, each of which defines the configuration setting for a corresponding segment of memory. The processing entity reads the configuration entries for a particular segment of the memory. The processing entity then determines the set of one or more configuration settings for the memory segment based on the configuration entry read. This process may be repeated for multiple segments of memory.

Abstract: An apparatus comprises one or more electro-optical coupling modules. An electro-optical coupling module comprises a diode, a flexible optical coupling element, a reflective surface, and an optical fiber. The diode performs an electro-optical conversion on a signal. The flexible optical coupling element communicates the signal between the diode and the reflective surface. The reflective surface reflects the signal between the flexible optical coupling element and the optical fiber.

Abstract: The optoelectronic transceiver includes an optoelectronic transmitter, an optoelectronic receiver, memory, and an interface. The memory is configured to store digital values representative of operating conditions of the optoelectronic transceiver. The interface is configured to receive from a host a request for data associated with a particular memory address, and respond to the host with a specific digital value of the digital values. The specific digital value is associated with the particular memory address received form the host. The optoelectronic transceiver may further include comparison logic configured to compare the digital values with limit values to generate flag values, wherein the flag values are stored as digital values in the memory.

Abstract: An optical transmission/reception device includes at least one light emitting portion and at least one light receiving portion on the same substrate. The light emitting portion includes at least a lower multilayer reflector and an active layer provided on the lower multilayer reflector. A metal layer including a plurality of opening portions is provided in an upper portion of the light emitting portion. Each of the opening portions has a size smaller than a light emission wavelength of the light emitting portion.

Abstract: A microcode configurable frequency clock that may be used to control the speed of high speed comparison in an operational optical transceiver. The frequency clock includes a memory and a logic circuit. The memory receives microcode generated data relating to the desired speed of comparison. The logic circuit is configured to receive an input clock signal and to produce an output clock signal by frequency dividing the input signal based on the microcode generated data. The output clock is used to control the speed of comparison in the optical transceiver.