Eye Safety Mechanism for Use in Optical Cable with Electrical Interfaces
Granted: November 20, 2008
Application Number:
20080285980
An eye safety mechanism for use with a bi-directional data cable having an electrical interface at least one (but potentially both) ends, despite the fact that the cable communicates over much of its length using a bi-directional optical channel. Upon power-up, the eye safety mechanism determines whether or not a loss of signal condition is present on an optical receive channel of the bi-directional data cable. If the loss of signal is present, the mechanism intermittently disables the…
LINEAR TRANSIMPEDANCE AMPLIFIER WITH MULTIPLEXED GAIN STAGE
Granted: November 20, 2008
Application Number:
20080284522
A linear transimpedance amplifier includes a forward transimpedance circuit that receives an input signal from an optical device. The forward transimpedance circuit generates a linear output signal. The forward transimpedance circuit includes a first gain path and a second gain path, the first gain path configured to amplify the input signal when the first gain path is at a lower input impedance relative to the second gain path and the second gain path configured to amplify the input…
RESISTIVE HEATING ELEMENT FOR ENABLING LASER OPERATION
Granted: October 30, 2008
Application Number:
20080267233
Heating resistor used to control laser operation. A laser package, such as a Transmitter Optical Subassembly (TOSA) includes a substrate. A laser is disposed on the substrate. A resistive heating element is disposed on the substrate with the laser. Control circuitry is connected to the resistive heating element. The control circuitry is configured to cause current flow through the resistive heating element based on temperature conditions. Current flow through the resistive heating…
PROTECTING AGAINST COUNTERFEIT ELECTRONICS DEVICES
Granted: October 30, 2008
Application Number:
20080267408
An optical transceiver module is authenticated in a host system. A host generates a data string and writes the data string to a first predetermined memory location known to the transceiver. The data string is cryptographically altered (either encrypted or decrypted) by the transceiver and written to a second predetermined memory location known to the host. The host retrieves the cryptographically altered data string and performs a complementary cryptographic operation (either a…
EYE SAFETY AND INTEROPERABILITY OF ACTIVE CABLE DEVICES
Granted: October 30, 2008
Application Number:
20080267620
An integrated cable configured to communicate over much of its length using one or more optical fibers includes an electrical connector at least one end. The electrical connector at a first end of the integrated cable and an optoelectronic device coupled to or included in the other end of the integrated cable may utilize a bidirectional status link to transmit status data to each other. If the status data indicates that optical signals transmitted over the optical channels between the…
OPTIMIZATION OF SERDES SAMPLING PARAMETERS
Granted: October 16, 2008
Application Number:
20080253293
One or more modules configured to cause a network diagnostic component to perform the following: an act of selecting first specific sampling parameters at which the SERDES is to receive network traffic; an act of determining a number of errors included in a signal output by the SERDES at the selected first specific sampling parameters; an act of repeating for a specified number of the remaining sampling parameters the acts of selecting specific sampling parameters and determining the…
TRANSCEIVER CONNECTOR WITH INTEGRATED MAGNETICS
Granted: October 9, 2008
Application Number:
20080248694
In one example embodiment, a connector structure includes a housing that defines a chamber, a plurality of magnetic cores positioned within the chamber, and a means for positioning the plurality of magnetic cores so that a first magnetic core of the plurality of magnetic cores is not in physical contact with a second magnetic core of the plurality of magnetic cores.
OPTOELECTRONIC MODULE RETENTION MECHANISM
Granted: October 9, 2008
Application Number:
20080248683
A retention mechanism for an electronic or optoelectronic module. In one example embodiment, an optoelectronic module retention clip includes a base, a pair of arms extending from the base, and a protrusion extending from each arm. Each protrusion is configured to engage a complementary structure defined in a de-latch slide and a complementary structure defined in an optoelectronic module shell so as to prevent motion of the de-latch slide relative to the shell when the optoelectronic…
POWER SOURCE FOR A DISPERSION COMPENSATION FIBER OPTIC SYSTEM
Granted: October 9, 2008
Application Number:
20080247765
This invention generally relates to an optical filter for a fiber optic communication system. An optical filter may be used, following a directly modulated laser source, and converts a partially frequency modulated signal into a substantially amplitude modulated signal. The optical filter may compensate for the dispersion in the fiber optic transmission medium and may also lock the wavelength of the laser source.
CHIRPED LASER WITH PASSIVE FILTER ELEMENT FOR DIFFERENTIAL PHASE SHIFT KEYING GENERATION
Granted: October 9, 2008
Application Number:
20080247763
A method for generating D-N-PSK optical signals is disclosed wherein a laser is modulated to generate optical signal pairs including phase modulated and fixed phase portions, the phase modulated portions having a frequency encoding one or more data symbols and the fixed phase portion having a carrier frequency and a phase corresponding to the immediately preceding phase modulated portion. The output of the laser is passed through an optical spectrum reshaper having a transmission…
CIRCUIT FOR TAPPING A LINE IN A NETWORK DIAGNOSTIC COMPONENT
Granted: October 9, 2008
Application Number:
20080247416
The embodiments disclosed herein relate to a network diagnostic component and related circuit for tapping a line in the network diagnostic component. The network diagnostic component includes a first network port configured to connect with a first node, a second network port configured to connect with a second node and a connection line directly coupling the first network port to the second network port configured to transmit network traffic between the first and second networks port.…
NON-UNIFORM FEEDTHROUGH AND LEAD CONFIGURATION FOR A TRANSISTOR OUTLINE PACKAGE
Granted: October 2, 2008
Application Number:
20080237835
A transistor outline package having a feedthrough via and lead configuration that maximizes the amount of usable area on a header of the package is disclosed. In one embodiment, the package includes a header having an interior surface that includes a first and second lead assembly. The first lead assembly includes two vias having a first diameter, with each first via being positioned along a first pin circle imaginarily defined on the interior surface of the header. Each first via also…
OPTICAL FM SOURCE BASED ON INTRA-CAVITY PHASE AND AMPLITUDE MODULATION IN LASERS
Granted: October 2, 2008
Application Number:
20080240180
A laser is disclosed including a gain section having a distributed feedback grating imposed thereon. An absorption section is embedded in the gain section such that the first and second portions of the distributed feedback grating extend on either side of the electro-absorption section. A controller imposes a substantially DC bias signal on the first and second gain electrodes and imposes a modulation signal encoding digital data on the modulation electrode to generate a frequency…
DISPERSION COMPENSATOR FOR FREQUENCY RESHAPED OPTICAL SIGNALS
Granted: October 2, 2008
Application Number:
20080240733
An optical transmitter is disclosed including an optical signal source generating a frequency modulated signal encoding data. An optical spectrum reshaper is positioned to receive the frequency modulated signal and converts the frequency modulated signal into a reshaped signal having increased amplitude modulation relative to the frequency modulated signal. A third-order dispersive element is positioned to receive the reshaped signal and is adapted to impose third-order dispersion on the…
MECHANISMS FOR HEAT TRANSFER IN AN OPTICAL TRANSCEIVER MODULE AND CARD CAGE SYSTEM
Granted: September 25, 2008
Application Number:
20080232067
Mechanisms and systems for dissipating heat from an optical transceiver module to a module card cage system. In one embodiment, a thermal conductive label having at least one raised portion is attached to a surface of the module. The raised portion is configured to contact at least a portion of the card cage to dissipate heat from the module to the card cage. In another embodiment, the card cage has a protruding depression formed on a part of its surface that is above a slot configured…
OPTOELECTRONIC DEVICE ALIGNMENT IN AN OPTOELECTRONIC PACKAGE
Granted: September 18, 2008
Application Number:
20080224287
Using one or more reference indicators in die attaching an optoelectronic device to a lead during the assembly of an optoelectronic package. One example method of assembling an optoelectronic package includes detecting a reference indicator included in a first component of an optoelectronic package. The method also includes die attaching a second component to the optoelectronic package at a die attach location. The die attach location is substantially aligned with the reference indicator…
LASER DRIVER BIAS CURRENT CALIBRATION
Granted: September 18, 2008
Application Number:
20080225910
A method for a calibration module to calibrate laser bias current in an optical transceiver. The method comprises causing the calibration module to configure a control module of the optical transceiver for a calibration operation, causing the calibration module to determine a laser bias current monitored by the control module, and determining one or more calibration factor values that cause the laser bias current monitored by the control module to substantially match a laser bias current…
PHOTODIODE HAVING ROUNDED EDGES FOR HIGH ELECTROSTATIC DISCHARGE THRESHOLD
Granted: September 4, 2008
Application Number:
20080210845
In one example, an optical detector includes a photosensitive layer, and a group of additional layers associated with that photosensitive layer. The group of additional layers may include first and second contact layer configured for electrical communication with the photosensitive layer. In this example, one of the group of layers is shaped so as to define a corner whose radius of curvature is greater than about 2 microns.
ROTATABLE TOP SHELL
Granted: August 28, 2008
Application Number:
20080203864
In one example, a rotatable top shell is provided for an example optoelectronic device. The rotatable top shell includes a body defining a curved tongue on one end. The tongue is configured to rotate about a complimenting curved mating surface of a bottom shell of the optoelectronic device to allow the body to rotate between an open position and a closed position. The rotatable top shell further includes means for securing the rotatable top shell relative to the bottom shell. The means…
MULTI-MODE INTEGRATED CIRCUIT FOR USE IN OPTOELECTRONIC DEVICES
Granted: August 28, 2008
Application Number:
20080205437
A multi-mode SerDes may be implemented in at least two different optoelectronic device architectures. The serializer includes a dual-mode bypass block for allowing data signals to go straight from input nodes to a multiplexing block or for decoding encoded data signals. A final dynamic high speed multiplexer multiplexes two data signals into one serial signal, or allows a single signal to go through. The deserializer includes an input dynamic high speed demultiplexer for demultiplexing…
