SERIALIZER/DESERIALIZERS FOR USE IN OPTOELECTRONIC DEVICES
Granted: May 8, 2008
Application Number:
20080107422
An optoelectronic device implements a serializer array circuit or multi-channel CDR circuit to reduce the cost and size of the circuit. An efficient serializer array circuit includes a plurality of serializer blocks sharing the functionality of a single CMU to clock a plurality of serial signals out of the final stages of the serializer blocks. An efficient multi-channel CDR circuit includes a single CDR for acquiring the clock for one of a plurality of data signals and a plurality of…
MANAGING BACKREFLECTION
Granted: April 10, 2008
Application Number:
20080085078
In one example, an optical device includes a body having a first surface and a second surface. At least a portion of the body is formed from a material that is transmissible to light. The body is configured to be positioned in an optical sub-assembly along an axis defined between an optoelectronic transducer and a port configured to receive an optical fiber. The axis is defined between a point on an optically active portion of the optoelectronic transducer and a point on a surface of the…
CROSS-POINT ADJUSTMENT CIRCUIT
Granted: April 3, 2008
Application Number:
20080079484
An amplifier stage or circuit for providing cross-point adjustment. The circuit may include a first input node configured to receive a first data signal and a second input node configured to receive a second data signal that is complementary of the first data signal. The circuit also includes a programmable first stage having a first node coupled to the first input node and a second node coupled to the second input node that is configured to adjust an amount of current provided to the…
ASYMMETRIC RISE/FALL TIME AND DUTY CYCLE CONTROL CIRCUIT
Granted: April 3, 2008
Application Number:
20080079490
Modules and signal control circuits configured to at least partially compensate for or adjust for asymmetric rise/fall time. The circuit may include a first input node configured to receive a first data signal and a second input node configured to receive a second data signal that is complementary of the first data signal. The circuit may also include a first stage having a first node coupled to the first input node and a second node coupled to the second input node and a second stage…
DUAL LASER DRIVER ARCHITECTURE IN AN OPTICAL TRANSCEIVER
Granted: April 3, 2008
Application Number:
20080080577
Embodiments disclosed herein relate to a dual laser driver architecture configured to be implemented on a single IC chip. The dual laser driver architecture includes at least a first laser driver stage configured to drive a first laser with a first current and a second laser driver stage configured to drive a second laser with a second current that is less than the first current. Embodiments also relate to an optical transceiver that implements the dual laser driver architecture.
EMI REDUCTION STAGE IN A POST-AMPLIFIER
Granted: March 27, 2008
Application Number:
20080074196
An amplifier output stage for reducing Electromagnetic Interference (EMI) that includes an output node and an input node. A first transistor has a base terminal coupled to the input node and has a collector terminal coupled to the output node. A second transistor has a base terminal coupled to an emitter terminal of the first transistor and has a collector terminal coupled to the output node. A third transistor has a collector terminal coupled to the emitter terminal of the first…
CIRCUIT FOR PROVIDING A SIGNAL BOOST
Granted: March 27, 2008
Application Number:
20080074197
Embodiments disclosed herein relate to an amplifier stage or circuit for providing a signal boost. The circuit includes an emitter-follower pair and a cross coupled differential pair. The cross coupled differential pair provides a feedback signal that provides a boost to a signal output by the emitter follower pair. In some embodiments, a capacitor of the cross coupled differential pair may be adjustable in order to vary the amount of boosting provided. In other embodiments, a current…
DIAGNOSTIC DEVICE
Granted: March 27, 2008
Application Number:
20080075103
A diagnostic device, such as a network probe or a blade, with wired and/or wireless communication capabilities. In one example embodiment, a network probe includes a processor, a memory in communication with the processor, and a buffer in communication with the processor. In this example embodiment, the processor is programmed to identify a triggering event in data received by the network probe and store, in the buffer, data that is associated with the triggering event.
ELECTRONIC DISPERSION COMPENSATION SYSTEMS AND METHODS
Granted: March 27, 2008
Application Number:
20080075202
An electronic dispersion compensation (EDC) system may comprise one or more EDC solution application modules. The EDC system may include a solution transition module. The solution transition module may be configured to determine a path between a first EDC solution performed by a first EDC solution application module and a second EDC solution performed by a second EDC solution application module. The solution transition module may be configured to provide transition instructions to an EDC…
DETERMINATION AND ADJUSTMENT OF LASER MODULATION CURRENT IN AN OPTICAL TRANSMITTER
Granted: March 20, 2008
Application Number:
20080069569
Systems and methods for controlling the modulation current of a laser included as a component of an optical transmitter, such as an optical transceiver module, are disclosed. Control of the modulation current, which affects various laser operational parameters, including extinction ratio and optical modulation amplitude, enables operation of the laser to be optimized, thereby enabling reliable transceiver performance to be achieved. In one embodiment, a method for modifying the…
THERMOELECTRIC COOLER WITH INRUSH CURRENT CONTROL
Granted: February 28, 2008
Application Number:
20080047278
Systems and methods for controlling a thermoelectric cooler (TEC) in an optical transceiver. A TEC system includes a processor that interacts with a power supply and a TEC controller to prevent inrush current. The power supply is switched by the processor and turned on only at a particular time. The power supply has a relatively large time constant such that it ramps slowly to its full value. In the meantime, the processor and TEC controller cause the temperature to ramp to a target…
ELECTRICAL OVERSTRESS EVENT INDICATOR ON ELECTRONIC CIRCUITRY
Granted: February 28, 2008
Application Number:
20080050113
Detecting electrical overstress events in electronic circuitry such as optical emitters. In one example embodiment, a laser includes an active area and a contact region in electrical communication with the active area. A portion of the contact region is configured to manifest a change in a visual attribute of the portion in response to exposure of the portion to an electrical overstress event.
LASER WITH RESONANT REFLECTOR
Granted: February 14, 2008
Application Number:
20080037606
A vertical cavity surface-emitting laser (VCSEL) is disclosed. The VCSEL includes a layer that at least partially defines an optical cavity having an optical axis. The VCSEL further includes a resonant reflector layer extending across at least part of the optical cavity. The resonant reflector layer has a refractive index that does not abruptly change laterally across the optical cavity. The refractive index of the resonant reflector layer includes contributions from a first material…
METHOD AND SYSTEM FOR RELEASING A PLUGGABLE MODULE
Granted: February 7, 2008
Application Number:
20080031577
A method and system is disclosed for locking and releasing a module utilized in a transceiver system that includes a plurality of modules in close proximity with one another. The module is generally configured to include a handle with an associated cam formed in a first section of the module. The handle is moveable in a direction to allow the cam to move an associated ejector button integrated with the module in order to release the module from the transceiver system, thereby permitting…
OPTICAL TRANSCEIVER MODULE HAVING AN ACTIVE LINEAR OPTOELECTRONIC DEVICE
Granted: February 7, 2008
Application Number:
20080031629
An optoelectronic transceiver comprises an active linear TOSA circuit mounted on a header. The active linear TOSA circuit includes input nodes for receiving a differential signal pair, a first bipolar transistor, a second bipolar transistor and an electro-optical transducer. A base terminal of the first bipolar transistor is coupled to the two input nodes and an emitter terminal of the first bipolar transistor is coupled to a base terminal of the second bipolar transistor. A collector…
LINEAR AMPLIFIER FOR USE WITH LASER DRIVER SIGNAL
Granted: February 7, 2008
Application Number:
20080031634
An active linear amplifier circuit mounted in an optoelectronic package includes input nodes for receiving a differential signal pair, a first bipolar transistor, a second bipolar transistor, an electro-optical transducer and a decoupling circuit. A base terminal of the first bipolar transistor is coupled to the two input nodes and an emitter terminal of the first bipolar transistor is coupled to a base terminal of the second bipolar transistor. A collector terminal of the first bipolar…
EFFICIENT CARRIER INJECTION IN A SEMICONDUCTOR DEVICE
Granted: January 31, 2008
Application Number:
20080023688
Semiconductor devices such as VCSELs, SELs, LEDs, and HBTs are manufactured to have a wide bandgap material near a narrow bandgap material. Electron injection is improved by an intermediate structure positioned between the wide bandgap material and the narrow bandgap material. The intermediate structure is an inflection, such as a plateau, in the ramping of the composition between the wide bandgap material and the narrow bandgap material. The intermediate structure is highly doped and…
OPTICAL SUBASSEMBLY HAVING INSERTABLE CYLINDRICAL SLEEVE
Granted: January 24, 2008
Application Number:
20080019643
An optical subassembly (“OSA”) for use in optical communications modules is disclosed. The OSA solves various issues related to the insertion and removal of an optical fiber connector into and from the OSA receptacle, including hard plug, wiggle performance, and shavings production. In one embodiment, an optical communications module is disclosed and includes a housing and an optical subassembly of the present invention partially contained within the housing. The optical subassembly…
SYSTEM AND METHOD FOR TRANSMITTING DATA ON RETURN PATH OF A CABLE TELEVISION SYSTEM
Granted: January 24, 2008
Application Number:
20080019706
An optical signal return path system includes a transmitter having a sample clock generator for generating a sample clock and an RF signal receiver for receiving and converting an analog RF data signal into a first data stream of digitized RF data samples at a rate determined by the sample clock. Supplemental channel circuitry provides a second data stream. A multiplexor receives and combines the first data stream and second data stream, and an optical transmitter converting the combined…
DIELECTRIC VCSEL GAIN GUIDE
Granted: January 24, 2008
Application Number:
20080020553
A vertical cavity surface emitting laser having a dielectric gain guide. The gain guide may provide current confinement, device isolation and possibly optical confinement. The first mirror and an active region may be grown. A pattern may be placed on or near the active region. A dielectric material may be deposited on the pattern and the pattern may be removed resulting in a gain guide. Then a top mirror may be grown on the gain guide. This structure with the dielectric gain guide may…
