DBR laser with improved thermal tuning effciency
Granted: March 19, 2009
Application Number:
20090074020
A distributed Bragg reflector (DBR) includes a base substrate and a gain medium formed on the base substrate. A waveguide positioned above the base substrate in optical communication with the gain medium and defines a gap extending between the base substrate and the waveguide along a substantial portion of the length thereof. The waveguide may have a grating formed therein. A heating element is in thermal contact with the waveguide and electrically coupled to a controller configured to…
SURFACE WARP RESISTANT OPTICAL DEVICES
Granted: March 19, 2009
Application Number:
20090074357
In at least one example, an optical component includes a central optical surface proximate an optical axis, a peripheral portion extending radially from the central optical surface, and a stepped portion between the central optical surface and the peripheral portion. The stepped portion may be formed to raise the central optical surface above the peripheral portion.
Variable Gain Amplifier Having Dual Gain Control
Granted: March 19, 2009
Application Number:
20090072904
An electronic amplifier circuit that provides improved gain control linearity characteristics resulting from having a controllable field effect transistor (FET) acting as a degeneration resistance (degeneration resistance FET) and a controllable load resistance FET. The overall gain function of the amplifier exhibits improved linearity in part due to the presence of the load FET, which tends to cancel the nonlinear behavior emanating from the degeneration FET. The circuit also includes a…
LIMITED LIFE TRANSCEIVER
Granted: March 12, 2009
Application Number:
20090067848
Systems and methods for an optical transceiver module to limit the amount of time the optical transceiver module is allowed to operate. The optical transceiver module includes at least one processor, a persistent memory and a system memory. The persistent memory, which is coupled to the at least one processor, contains microcode. The microcode is loaded from the persistent memory to the system memory and executed by the at least one processor. The executed microcode causes the optical…
MONOLITHIC OPTO-ISOLATORS
Granted: March 5, 2009
Application Number:
20090059987
Monolithic opto-isolators and arrays of monolithic opto-isolators are disclosed. The monolithic opto-isolators are manufactured in a single semiconductor wafer where they may be tested at the wafer level before each opto-isolator is singulated from the wafer. The monolithic opto-isolators include a VCSEL monolithically produced adjacent to a photodiode where an axis of optical signal transmission of the VCSEL is substantially parallel to an axis of optical signal reception by the…
ACTIVE OPTICAL CABLE WITH INTEGRATED CONTROL FEATURES
Granted: March 5, 2009
Application Number:
20090060425
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 least one end. The active cable can include a circuit disposed in the integrated cable, the circuit configured to provide pre-emphasis of the second electrical signal. The pre-emphasis can be accomplished by either boosting high frequency content or removing low frequency content from the first or second electrical signals.…
REDUNDANCY AND INTEROPERABILITY IN MULTI-CHANNEL OPTOELECTRONIC DEVICES
Granted: March 5, 2009
Application Number:
20090060520
A multi-channel optoelectronic device is configured to establish a redundant status link with a remote device. The optoelectronic device can transmit N transmit optical signals to the remote device over a plurality of transmit channels and receive N receive optical signals from the remote device over a plurality of receive channels. The optoelectronic device includes one or more spare transmit and receive channels. When used with a remote device having spare transmit and receive…
PARALLEL HIGH-SPEED COMMUNICATION LINKS WITH REDUNDANT CHANNEL ARCHITECTURES
Granted: March 5, 2009
Application Number:
20090060522
An optical transmission system includes more optical channels than electrical channels. If an optical channel is not functioning, the signals may be diverted to another optical channel since there are more optical channels than electrical channels. Embodiments of the present invention also relate to switches for switching the electrical channels to particular optical channels on either or both of the transmission and reception side. The switches include switching elements and selector…
OPTICAL FM SOURCE BASED ON INTRA-CAVITY PHASE AND AMPLITUDE MODULATION IN LASERS
Granted: March 5, 2009
Application Number:
20090060526
An optical transmitter is discloses having a gain section and a phase section. The phase section is modulated to generate a frequency modulated signal encoding data. The frequency modulated signal is transmitted through an optical spectrum reshaper operable to convert it into a frequency and amplitude modulated signal. In some embodiments, a driving circuit is coupled to the phase and gain sections is configured to simultaneously modulate both the phase and gain sections such that the…
Optical Network Unit Transceiver Module Having Direct Connect RF Pin Configuration
Granted: February 19, 2009
Application Number:
20090047027
Systems and method for using a direct connect RF pin configuration for an ONU transceiver module to connect directly to an external component. The ONU module communicates with an optical network. The ONU module further includes an RF interface and a direct connect RF pin configuration to communicate using RF signals. In one embodiment, the direct connect RF pin configuration includes two ground pins and a data pin which are spaced apart and directly connected to a PCB of the ONU. The…
Asymmetric Scheduling of Multiple Analog Inputs Using A Single A/D Converter For Fiber-Optic Transceivers
Granted: February 19, 2009
Application Number:
20090047026
A firmware control method for the optimized use of a single A/D converter to measure multiple analog signals with asymmetric requirements on sampling rate including a lookup table design procedure and an acquisition algorithm. Since diagnostic analog parameter values require differing sampling rates to be effectively measured, the schedule for converting those values to digital value should correspond to the associated sampling rate. The present invention involves the creation and…
DBR LASER WITH IMPROVED THERMAL TUNING EFFICIENCY
Granted: February 12, 2009
Application Number:
20090041073
A distributed Bragg reflector (DBR) includes a base substrate and a gain medium formed on the base substrate. A waveguide positioned above the base substrate in optical communication with the gain medium and defines a gap extending between the base substrate and the waveguide along a substantial portion of the length thereof The waveguide having a grating formed therein. A heating element is in thermal contact with the waveguide and electrically coupled to a controller electrically…
AUTOMATIC SELECTION OF DATA RATE FOR OPTOELECTRONIC DEVICES
Granted: February 12, 2009
Application Number:
20090041469
Automatic selection and setting an operational data rate of an optoelectronic device. In particular, an integrated circuit includes a data rate select input for the selection and setting of the operational data rate. The integrated circuit internally generates a loss of lock signal if an input data rate does not match the operational data rate. The integrated circuit then automatically sets and selects operational data rates within a predetermined range of operational data rates until…
SPIDER CLIP FOR SECURING A CIRCUIT BOARD WITHIN A COMMUNICATIONS MODULE
Granted: February 5, 2009
Application Number:
20090032291
A clip for securing a component, such as a circuit board, within a communications module is disclosed. The clip may include a flat base with legs extending therefrom and resilient springs disposed at terminal ends of each of the legs. The legs may be configured to frictionally secure the clip to the module. For instance, the legs may secure the clip to a top shell portion of the module. The springs may be configured to resiliently compress against corresponding contact zones on the…
PRE-EMPHASIS CIRCUIT
Granted: February 5, 2009
Application Number:
20090033426
An amplifier stage or circuit for providing pre-emphasis. The circuit includes a first input node configured to receive a first data signal and a second input node configured to receive a second data. The circuit also includes an adjustable delay stage configured to at least partially produce a delay in the first and/or second data signals to thereby generate a first delayed signal and/or second delayed signal. The circuit additionally includes a pulse generation stage configured to…
NON-COPLANAR HIGH-SPEED INTERCONNECTS
Granted: February 5, 2009
Application Number:
20090033442
In one example embodiment, a high-speed package includes first and second layers and a multi-channel non-coplanar interconnect. The first layer includes first and second sets of coplanar transmission lines. The second layer includes third and fourth sets of coplanar transmission lines. The multi-channel non-coplanar interconnect includes first and second channels. The first channel connects the first set of transmission lines to the third set of transmission lines. The second channel…
MIGRATION ENHANCED EPITAXY FABRICATION OF ACTIVE REGIONS HAVING QUANTUM WELLS
Granted: February 5, 2009
Application Number:
20090034571
Semiconductor lasers, such as VCSELs having active regions with flattening layers associated with nitrogen-containing quantum wells are disclosed. MEE (Migration Enhanced Epitaxy) is used to form a flattening layer upon which a quantum well is formed and thereby enhance smoothness of quantum well interfaces and to achieve narrowing of the spectrum of light emitted from nitrogen containing quantum wells. A cap layer is also formed over the quantum well.
INTEGRATED LASER AND PHOTODETECTOR CHIP FOR AN OPTICAL SUBASSEMBLY
Granted: February 5, 2009
Application Number:
20090034982
A semiconductor device with an integrated optical transmitter and optical receiver is disclosed that can be used in an optical subassembly. The device may include a substrate, a first component, an optical filter, and a second component, wherein the first component comprises an optical transmitter and the second component comprises an optical receiver, or vice versa. The first component can be configured to emit (or be sensitive to) a first optical signal having a first wavelength while…
DYNAMIC DIGITAL DIAGNOSTIC ALERTS
Granted: January 29, 2009
Application Number:
20090028551
Alerts, such as laser driver current alarms, are triggered in an optoelectronic device based on dynamic digital diagnostics, such as operating temperature. Optoelectronic devices may execute microcode structured to represent a formulaic relation between a first parameter (e.g., temperature) and an indicator value for a second parameter (e.g., laser driver current). The microcode may further be structured to cause the optoelectronic device to access the first parameter, calculate an…
METHOD AND APPARATUS FOR MONITORING THE POWER LEVEL OF TWO OR MORE OPTICAL TRANSMITTERS
Granted: January 29, 2009
Application Number:
20090028556
Methods and apparatus for monitoring the power level of one or more optical emitters are provided. In some embodiments, optical signals from two or more optical emitters are directed at different regions of a photo detector. The photo detector may include two or more spaced contacts that are adapted to receive different contributions of photo current from each of the optical signals. By monitoring the photo currents in the two or more spaced contacts, a measure of the optical power of…
