Abstract: Systems, devices and methods are disclosed for adjusting the operating characteristic of an optical signal transmitted by an optoelectronic device based on the operational data rate, as is indicated by a ‘rate select’ signal. The rate select can be generated automatically, or can be transmitted from a host device. One example of an operating characteristic that can be adjusted is the optical modulation level of the transmitted signal.

Abstract: An integrated circuit for use at a reduced Vdd voltage. An integrated circuit is designed and implemented such that it is usable at a voltage less than an industry standard Vdd voltage. The integrated circuit may include a voltage filter that may either be implemented on the integrated circuit or external to the integrated circuit. The voltage filter receives an industry standard IC voltage and produces a filtered voltage that is that some value below the industry standard IC voltage. The voltage filter also removes noise from the industry standard IC voltage. The integrated circuit includes signal processing circuitry that is designed and implemented to improve signal quality and to operate at the filtered voltage.

Abstract: A circuit includes a first interface to receive a plurality of data streams from a plurality of signal inputs, a multiplexer to interleave the plurality of data streams into a serial data stream, and an output driver, including pre-emphasis circuitry, to transmit the serial data stream on a first output. The plurality of data streams may correspond to digital video. The plurality of data streams may be encoded using transition-minimized differential signaling. The first output may be configured to couple to a cable to convey electrical signals.

Abstract: An active cable that is configured to communicate over much of its length using one or more optical fibers, and that includes an integrated electrical connector at at least one end. The active cable includes an integrated retiming mechanism. Thus, multiple links of cable may be used while reducing the chance that the jitter will exceed allowable limits. The cable may be an electrical to optical cable, and electrical to electrical cable, or one of many other potential configurations.

Abstract: An adaptor that mechanically and/or electrically adapts to and/or from an electrical connector that is integrated with an active cable at one end of an active optical cable, wherein the optical cable is configured to communicate over much of its length using one or more optical fibers. The cable may be an electrical to optical cable, and electrical to electrical cable, or one of many other potential configurations.

Abstract: An active cable that includes an integrated electrical connector at one end and an optical connector at the other end, and one or more optical fibers disposed therebetween to facilitate optical communication over much of the length of the active cable. The communication may be one direction or even duplex.

Abstract: An active cable that is configured to communicate over much of its length using one or more optical fibers, and that includes an integrated electrical connector at at least one end. The active cable includes an integrated eye safety controls to thereby reduce the chance of injury should the active cable be severed, or otherwise unplugged at an optical end, if any. The cable may be an electrical to optical cable, and electrical to electrical cable, or one of many other potential configurations.

Abstract: An active cable that communicates over much of its length using one or more optical fibers, but which includes at integrated electrical connector at least one of its ends. The cable may be an electrical to optical cable, and electrical to electrical cable, or one of many other potential configurations.

Abstract: An electrical connector that is integrated within an active cable at one end of the active cable, wherein the active cable is configured to communicate over much of its length using one or more optical fibers. The cable may be an electrical to optical cable, and electrical to electrical cable, or one of many other potential configurations.

Abstract: An active cable that is configured to communicate over much of its length using one or more optical fibers, and that includes an integrated electrical connector at at least one end. The active cable includes a power transmission spanning the length of the optical fiber(s). Thus, electrical power from one end of the optical cable may be provided to an opposite side of the optical cable. The cable may be an electrical to optical cable, and electrical to electrical cable, or one of many other potential configurations.

Abstract: Circuitry for monitoring an optoelectronic device includes memory, including one or more memory arrays for storing information related to the optoelectronic device and analog to digital conversion circuitry for: receiving a plurality of analog signals from the optoelectronic device; converting the received analog signals into digital values; and storing the digital values in memory mapped locations within the memory. The analog signals correspond to operating conditions of the optoelectronic device. The circuitry further includes a memory interface for allowing a host device to read from and write to memory mapped locations within the memory in accordance with commands received from a host device. The memory interface allows the host device to read the digital values corresponding to operating conditions of the optoelectronic device from the memory mapped locations within the memory.

Abstract: A transceiver module having integrated eye diagram opening functionality for reducing jitter is described. The transceiver module may include a transmitter eye opener and a receiver eye opener integrated in a single circuit. The transceiver module may also include serial control and various other integrated components. Other functionalities that may be integrated on the transceiver module include loopback modes, bypass features, bit error rate testing, and power down modes.

Abstract: This disclosure concerns systems and devices configured to implement impedance matching schemes in a high speed data transmission environment. In one example, an electrical connection system is provided that includes a circuit board upon which are disposed a one or more signal contact pads, each of which is configured to communicate with a complementary element of an external electrical device such that a respective shunt capacitance is defined. One or more of the signal contact pads define at least one open portion through which communication signals cannot pass. The open portions of the one or more signal contact pads are configured to reduce a shunt capacitance that is defined at the coupling of each signal contact pad and corresponding connector. As well, one or more signal lines are likewise disposed on the circuit board such that each signal line is connected to a respective one of the signal contact pads. The circuit board finally includes one or more ground contact pads and power contact pads.

Abstract: Fiber stub interface for reducing cladding mode light. The fiber stub can be implemented in an optical transmission device. The optical transmission device can be a transceiver that also includes an optical signal receiver. The fiber stub includes an optical fiber and a ferrule. The optical fiber includes both a core and a cladding. The ferrule includes a glass material with a refractive index that is greater than the refractive index of at least a portion of the optical fiber. As a result, the cladding modes are refracted into the ferrule and away from the core, thereby reducing the chance that they are transmitted to an external optical fiber. An absorptive layer can be applied to an outer surface of the ferrule to absorb the refracted cladding modes.

Abstract: This disclosure is generally concerned with optical transceivers. In one example, an optical transceiver implements electronic dispersion compensation in the receive path, as well as optical preemphasis on the transmitted signal in order to improve aspects of optical performance on multimode fiber links, relative to systems that do not implement transmitter preemphasis. Among other things, such optical transceivers can be used to achieve longer link lengths over a given fiber and/or to improve the percentage of fibers that can be used with a given performance electronic dispersion implementation.

Abstract: An integrated circuit for use at a reduced Vdd voltage. An integrated circuit is designed and implemented such that it is usable at a voltage less than an industry standard Vdd voltage. The integrated circuit may include a voltage filter that may either be implemented on the integrated circuit or external to the integrated circuit. The voltage filter receives an industry standard IC voltage and produces a filtered voltage that is that some value below the industry standard IC voltage. The voltage filter also removes noise from the industry standard IC voltage. The integrated circuit includes signal processing circuitry that is designed and implemented to improve signal quality and to operate at the filtered voltage.

Abstract: An optical transceiver is disclosed. The transceiver includes a receiver having adaptive electronic dispersion compensation (EDC) circuitry on at least one optical channel. The adaptive electronic dispersion compensation circuitry provides diagnostics information to a host system. The transceiver can be an XFP, X2, XENPAK, SFP, SFF, GBIC or other type of transceiver. The diagnostics information can include information on the time variation of a quality of the optical channel and/or a measure of a worst state of the optical channel over a period of time. The diagnostics information can also be derived from a measure of a quality of an equalized receiver signal, a current tap weight value, and many other specific values.

Abstract: A method and apparatus for generating multiple levels of optical signals. A plurality of electrical currents is produced. The magnitudes of the electrical currents are independent of each other. Optical signals are produced using the electrical currents. Each optical signal has an amplitude corresponding to one of the multiple levels. The amplitudes of the optical signals corresponding to a level are adjustable by independently adjusting a respective electrical current. Amplitudes of optical signals corresponding to other levels may be adjusted independently.

Abstract: Systems and devices using diffractive and optionally refractive elements to launch an optical signal with a controlled amplitude and phase distribution into a multimode optical fiber for improved modal dispersion are provided. More particularly, optical ports, transmitter optical subassemblies (TOSAs), and transceivers use integrated diffractive and optionally refractive elements to launch a helically propagating light distribution, also known as a vortex launch. One embodiment includes a monolithic transparent port that generally includes: a lens on a first surface for receiving and collimating or focusing an optical signal; and a diffractive surface pattern for receiving the optical signal from the lens and launching the optical signal into a multimode optical fiber with a controlled intensity and phase distribution. Alternatively, the lens can be added as a separated component or omitted altogether while the diffractive surface pattern is formed on either the laser or fiber receptacle sides of the port.

Abstract: An integrated circuit. The integrated circuit is usable in a transceiver module. The integrated circuit includes an input port that is configured to receive a data stream. A clock port on the integrated circuit is configured to receive a reference clock diplexed with another signal or voltage used by the integrated circuit. An eye opening circuit is connected to the input port and clock. The eye opening circuit is configured to retime the data stream received at the input port. An output port is connected to the eye opening circuits The output port is configured to transmit a retimed signal from the eye opening circuit to a device external to the integrated circuit. A bypass circuit is connected to the input port and the output port. The bypass circuit may selectively bypass the eye opening circuit.