摘要:
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.
摘要:
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.
摘要:
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./2, the intensity of the beam transmitted through the crystal varies linearly with the modulation. Such linear modulation allows crystals exhibiting the zero electric field photorefractive effect to remotely sense phase modulations or vibrations of any type in the absence of electrical signals in the vicinity of the sensor.
摘要翻译:全光学自对准全息相位调制和运动感测装置包括呈现零电场光折射效应的晶体,相位调制或振动源或机构,相干光辐射源,分束和引导光学器件,以及 至少一个光辐射检测器。 来自光辐射源的输出被分成单独的光束,其中一个或全部是相位调制的。 光束被引导通过呈现零电场光折射效应的晶体,并且所得到的透射光束由光学辐射检测器检测以提供光束的相位调制的测量。 由于具有零电场光折变效应的晶体的独特特性,传感器在不存在电场的情况下起作用,由此,如果晶体的折射率光栅的相位或干涉光束的相位相位变化非常小于 pi / 2,透射通过晶体的光束的强度随着调制线性变化。 这种线性调制允许呈现零电场光折变效应的晶体在传感器附近没有电信号的情况下远程检测任何类型的相位调制或振动。
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.