Abstract: The principles of the present invention relate to aligning optical components with three degrees of translational freedom. A lens pin, a lens base, and a molded package are aligned in a first direction, a second direction, and a third direction such that the signal strength of optical signals transferred between a lens included in the lens pin and the molded package is optimized. The lens pin is mechanically coupled to the lens base to fix the position of the lens relative to the molded package in the first direction. Subsequently, the lens base and the molded package are realigned in the second and third directions such that the signal strength is again optimized. The lens base is mechanically coupled to the molded package to fix the position of the lens base relative to the molded package in the second and third directions.

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.

Abstract: A telecommunications system and constituent integrated circuit that includes a post-amplifier assembly configured for communication with an optical receiver, a laser driver assembly configured for communication with the optical transmitter, and a controller assembly configured to control the post-amplifier and laser driver. The post-amplifier, the laser driver, and the controller assemblies are embodied on a single integrated circuit, thereby reducing manufacturing costs. Noise due to clock generation may be reduced by having the clock act on a transient basis, turning on when needed during the boot process, and turning off when not needed during normal operation.

Abstract: Systems and methods for repeating optical signals. A scalable transceiver based repeater includes one or more transceivers. Each transceiver includes an optical receiver that receives a channel of an optical signal. The optical transmitter in each transceiver transmits the channel received by the associated optical receiver. A switch is used to redirect the channels, which may be in an electrical form at the switch, from the optical receivers back to the optical transmitters. The switch can also be used to add/drop the channels from the repeater. The optical transmitter and/or the optical receiver of each transceiver may also include a clock/data recovery circuit (CDR). The repeater is scalable because transceivers can be added/replaced as needed. A demultiplexor can separate an optical signal into the channels that are received by the optical receivers. A multiplexor combines the channels generated by the optical transmitters.

Abstract: A transceiver and assembly process is provided to passively align a lens within a transmitting sleeve of a duplex port assembly with a light emitting component within an insert molded package during the assembly of the transceiver. The transceiver design and manufacturing process allow for pivoting of the receiving sleeve around a substantially common access such that a light detecting component may be actively aligned with a lens included in a receiving sleeve of the duplex port assembly.

Abstract: This disclosure concerns systems and devices configured to implement impedance matching schemes in a high speed data transmission environment. In one example, an optoelectronic assembly is provided that includes a TO package having a base through which one or more leads pass. The leads are electrically coupled to an optoelectronic device in the TO package, and are electrically isolated from the base. Some or all of the leads include a ground ring that is electrically isolated from the lead and electrically coupled with the base. A circuit interconnect is also included that is electrically coupled to the optoelectronic device and the TO package. The circuit interconnect includes a dielectric substrate having signal traces that are electrically coupled to the signal leads. A ground signal conductor disposed on the dielectric substrate is electrically coupled with the ground rings.

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 optical transceiver, and related methods, are disclosed. One example of the optical transceiver includes a VCSEL that is optically coupled with a launch element configured and arranged to pass an optical signal, generated by the VCSEL, to an optical transmission medium, such as a legacy system optical fiber. In particular, the launch element implements offset launching of the optical signal from the VCSEL into a predefined launch zone of the optical transmission medium. In this way, the effective bandwidth of the optical transmission medium is increased, and modal dispersion reduced.

Abstract: A system for using an electrical adapter to test an electrical device is provided. The system includes a tester, an electrical device, and the electrical adapter. The electrical adapter includes a board having first and second planar surfaces, a first electrical socket coupled to the first planar surface of the printed circuit board and a second electrical socket coupled to the second planar surface of the printed circuit board. The board includes electrical connectors electrically coupling the first and second electrical sockets to each other. The first electrical socket of the adapter is suitable for temporary connection to an electrical interface of the tester, and the second electrical socket is suitable for temporary connection to an electrical interface of the electrical device. The electrical device can be one of a plurality of electrical devices and the tester can be one of a plurality of testers.

Abstract: A host adaptor is configured to monitor operation of an optoelectronic transceiver. The host adapter includes a transceiver interface, memory, comparison logic and a host interface. The transceiver interface receives from the optoelectronic transceiver digital values corresponding to operating conditions of the optoelectronic transceiver. The memory includes one or more memory arrays for storing information related to the optoelectronic transceiver, including the digital values received from the optoelectronic transceiver. The comparison logic is configured to compare the digital values with limit values to generate flag values, wherein the flag values are stored in predefined flag storage locations within the memory during operation of the optoelectronic transceiver. The host interface enables a host device to read from host specified locations within the memory, including the predefined flag storage locations, in accordance with commands received from the host device.

Abstract: An assembly and method for testing an optical subassembly by locally heating or cooling the optical subassembly. Locally heating or cooling the optical subassembly can include using a thermal transfer assembly. The thermal transfer assembly can include a thermoelectric cooler. A clamping assembly is provided to place the optical subassembly in electrical communication with a testing assembly. The thermal transfer assembly can be associated with the clamping assembly. After achieving the desired temperature, a data stream is transmitted through the optical subassembly and evaluated for compliance.

Abstract: Methods and processes are disclosed for calibrating optoelectronic devices, such as optoelectronic transceivers and optoelectronic receivers, based upon an avalanche photodiode breakdown voltage. In general, the method involves adjusting a reverse-bias voltage of the avalanche photodiode until avalanche breakdown of the avalanche photodiode occurs. An optimized APD reverse-bias voltage is then determined by reducing the reverse-bias voltage at which avalanche breakdown occurs by a predetermined offset voltage. This process is performed at a variety of different temperatures. Information concerning each temperature and the corresponding optimized APD reverse-bias voltage is stored in a memory of the optoelectronic device.

Abstract: Methods and processes are disclosed for calibrating optoelectronic devices, such as optoelectronic transceivers and optoelectronic receivers, based upon a measured avalanche photodiode bit error rate. In general, the method involves measuring a bit error rate for the avalanche photodiode and adjusting the reverse bias voltage of the avalanche photodiode until the bit error rate is minimized. This process is repeated for each of a variety of different thermal conditions. Information concerning each thermal condition and the corresponding reverse bias voltage is stored in a memory of the optoelectronic device.

Abstract: Photorefractive crystals having the formula K.sub.1-y Li.sub.y Ta.sub.1-x Nb.sub.x O.sub.3 wherein x is between 0 and 1 and y is between 0.0001 and 0.15. The crystals are useful as a photorefractive material for use in optical systems. The crystals may be doped with various first transition elements and lanthanides including copper, vanadium, chromium, iron, and manganese, nickel, europium and cerium.

Abstract: Photorefractive crystals having the formula K.sub.1-y Li.sub.y Ta.sub.1-x Nb.sub.x O.sub.3 wherein x is between 0 and 1 and y is between 0.0001 and 0.15. The crystals are useful as a photorefractive material for use in optical systems. The crystals may be doped with various first transition elements and lanthanides including copper, vanadium, chromium, iron, and manganese, nickel, europium and cerium.

Abstract: An all-optical, self-aligning, holographic phase modulation and motion sensing apparatus includes a crystal exhibiting a zero electric field photorefractive effect, a phase modulation or vibration source or mechanism, a source of coherent optical radiation, beam splitting and directing optics, and at least one optical radiation detector. The output from the optical radiation source is split into separate beams, one or all of which are phase modulated. The beams are directed through the crystal exhibiting a zero electric field photorefractive effect, and the resultant transmitted beams are detected by an optical radiation detector to provide a measurement of the phase modulation of the beams. The sensor functions in the absence of an electric field because of the unique characteristic of the crystal exhibiting the zero electric field photorefractive effect whereby if either the phase of the crystal's index grating or of the interfering beams is modulated with a phase change very much less than .pi.