DIGITAL OPTICAL NETWORK ARCHITECTURE
Granted: March 13, 2008
Application Number:
20080063407
A digital optical network (DON) is a new approach to low-cost, more compact optical transmitter modules and optical receiver modules for deployment in optical transport networks (OTNs). One important aspect of a digital optical network is the incorporation in these modules of transmitter photonic integrated circuit (TxPIC) chips and receiver photonic integrated circuit (TxPIC) chips in lieu of discrete modulated sources and detector sources with discrete multiplexers or demultiplexers.
TRANSMITTER PHOTONIC INTEGRATED CIRCUITS (TxPICs) AND OPTICAL TRANSPORT NETWORK SYSTEM EMPLOYING TxPICs
Granted: February 21, 2008
Application Number:
20080044128
A photonic integrated circuit (PIC) chip comprising an array of modulated sources, each providing a modulated signal output at a channel wavelength different from the channel wavelength of other modulated sources and a wavelength selective combiner having an input optically coupled to received all the signal outputs from the modulated sources and provide a combined output signal on an output waveguide from the chip. The modulated sources, combiner and output waveguide are all integrated…
OPTICAL TRANSMISSION NETWORK WITH ASYNCHRONOUS MAPPING AND DEMAPPING AND DIGITAL WRAPPER FRAME FOR THE SAME
Granted: February 21, 2008
Application Number:
20080044183
An optical transmission network is inherently asynchronous due to the utilization of a variable overhead ratio (V-OHR). The network architecture makes extensive use of OEO regeneration, i.e., deals with any electronic reconditioning to correct for transmission impairments, such as, for example, FEC encoding, decoding and re-encoding, signal reshaping, retiming as well as signal regeneration. The optical transmission network includes a plesiochronous clocking system with intermediate…
OPTICAL TRANSMISSION NETWORK WITH ASYNCHRONOUS MAPPING AND DEMAPPING AND DIGITAL WRAPPER FRAME FOR THE SAME
Granted: February 14, 2008
Application Number:
20080037984
An optical transmission network is inherently asynchronous due to the utilization of a variable overhead ratio (V-OHR). The network architecture makes extensive use of OEO regeneration, i.e., deals with any electronic reconditioning to correct for transmission impairments, such as, for example, FEC encoding, decoding and re-encoding, signal reshaping, retiming as well as signal regeneration. The optical transmission network includes a plesiochronous clocking system with intermediate…
Photonic Integrated Circuit (PIC) Chips
Granted: February 7, 2008
Application Number:
20080031626
A photonic integrated circuit (PIC) chip comprising an array of modulated sources, each providing a modulated signal output at a channel wavelength different from the channel wavelength of other modulated sources and a wavelength selective combiner having an input optically coupled to received all the signal outputs from the modulated sources and provide a combined output signal on an output waveguide from the chip. The modulated sources, combiner and output waveguide are all integrated…
OPTICAL TRANSPORT NETWORK HAVING A PLURALITY OF MONOLITHIC PHOTONIC INTEGRATED CIRCUIT (PIC) SEMICONDUCTOR CHIPS
Granted: January 31, 2008
Application Number:
20080025726
A photonic integrated circuit (PIC) chip comprising an array of modulated sources, each providing a modulated signal output at a channel wavelength different from the channel wavelength of other modulated sources and a wavelength selective combiner having an input optically coupled to received all the signal outputs from the modulated sources and provide a combined output signal on an output waveguide from the chip. The modulated sources, combiner and output waveguide are all integrated…
Monolithic Transmitter Photonic Integrated Circuit (TxPIC) with a Traversely Disposed Output
Granted: January 17, 2008
Application Number:
20080013881
A photonic integrated circuit (PIC) chip comprising an array of modulated sources, each providing a modulated signal output at a channel wavelength different from the channel wavelength of other modulated sources and a wavelength selective combiner having an input optically coupled to received all the signal outputs from the modulated sources and provide a combined output signal on an output waveguide from the chip. The modulated sources, combiner and output waveguide are all integrated…
INTEGRATED OPTICAL CIRCUITS HAVING DROP-IN LOCATIONS FOR OPTICAL CIRCUIT ELEMENTS
Granted: December 27, 2007
Application Number:
20070297715
A plurality of mask images defines an optical circuit image in photoresist. Each of the mask images comprises parts of the optical circuit and the totality of all mask images together defines an optical circuit. The optical circuit is thus made up of plural optical elements some of which may be positioned in drop-in locations within the boundary of another optical circuit element. A photolithography system globally aligns and exposes the mask images in photoresist. The resultant…
Monolithic Transmitter Photonic Integrated Circuit (TxPIC) Semiconductor Chip
Granted: October 25, 2007
Application Number:
20070248299
A photonic integrated circuit (PIC) chip comprising an array of modulated sources, each providing a modulated signal output at a channel wavelength different from the channel wavelength of other modulated sources and a wavelength selective combiner having an input optically coupled to received all the signal outputs from the modulated sources and provide a combined output signal on an output waveguide from the chip. The modulated sources, combiner and output waveguide are all integrated…
MONOLITHIC TRANSMITTER PHOTONIC INTEGRATED CIRCUIT (TxPIC) WITH INTEGRATED OPTICAL COMPONENTS IN CIRCUIT SIGNAL CHANNELS
Granted: October 18, 2007
Application Number:
20070242919
A photonic integrated circuit (PIC) chip comprising an array of modulated sources, each providing a modulated signal output at a channel wavelength different from the channel wavelength of other modulated sources and a wavelength selective combiner having an input optically coupled to received all the signal outputs from the modulated sources and provide a combined output signal on an output waveguide from the chip. The modulated sources, combiner and output waveguide are all integrated…
Transmitter Photonic Integrated Circuits (TxPICs) with Directly Modulated Lasers and Wavelength Selective Combiners
Granted: October 18, 2007
Application Number:
20070242918
A photonic integrated circuit (PIC) chip comprising an array of modulated sources, each providing a modulated signal output at a channel wavelength different from the channel wavelength of other modulated sources and a wavelength selective combiner having an input optically coupled to received all the signal outputs from the modulated sources and provide a combined output signal on an output waveguide from the chip. The modulated sources, combiner and output waveguide are all integrated…
BROADBAND OPTICAL VIA
Granted: October 4, 2007
Application Number:
20070230873
A broadband optical via provides a low loss interconnection between waveguides in two vertically adjacent planar waveguiding layers. Two waveguides, one in each planar layer, evanescently interact over an interaction length, and substantially all of the power on one waveguide is transferred to the second waveguide. The relative detuning between waveguides is varied along the interaction region by tapering the width of one or both guides along the direction of propagation. The interaction…
APPLICATION OF HARDWARE-BASED MAILBOXES IN NETWORK TRANSCEIVERS AND DISTRIBUTED APPROACH FOR PREDICTABLE SOFTWARE-BASED PROTECTION SWITCHING
Granted: September 13, 2007
Application Number:
20070211742
A line card in a network node having a local memory coupled to a local controller and local logic circuit. The local memory in the line card stores state information for signals processed by the line card itself, as well as state information for signals processed by other line cards. The logic circuit and controller implement a same fault detection and signal processing algorithms as all other line cards in the group, to essentially effectuate a distributed and local hardware based…
DEPLOYMENT OF ELECTRO-OPTIC AMPLITUDE VARYING ELEMENTS (AVEs) AND ELECTRO-OPTIC MULTI-FUNCTIONAL ELEMENTS (MFEs) IN PHOTONIC INTEGRATED CIRCUITS (PICs)
Granted: August 30, 2007
Application Number:
20070201785
Electro-optic amplitude varying elements (AVEs) or electro-optic multi-function elements (MFEs) are integrated into signal channels of photonic integrated circuits (PICs) or at the output of such PICs to provide for various optical controlling and monitoring functions. In one case, such PIC signal channels may minimally include a laser source and a modulator (TxPIC) and in another case, may minimally include a photodetector to which channels, in either case, an AVE or an MFE may be…
Receiver Photonic Integrated Circuit (RxPIC) Chip Utilizing Compact Wavelength Selective Decombiners
Granted: August 9, 2007
Application Number:
20070183737
A monolithic receiver photonic integrated circuit (RxPIC) chip includes a plurality of optical signal channels together with other active elements integrated on a semiconductor chip, which chips further include a wavelength selective decombiner comprising a supergrating or an Echelle grating which provides for a more compact chip compared to an integrated on-chip arrayed waveguide grating (AWG) functioning as a wavelength selective decombiner.
MONOLITHIC PHOTONIC INTEGRATED CIRCUIT (PIC) WITH FORWARD ERROR CORRECTION (FEC)
Granted: August 9, 2007
Application Number:
20070183738
Monolithic photonic integrated circuits (PICs) utilize forward error correction (FEC) joint encoder or plural encoders or a joint decoder or plural decoders.
METHOD OF TUNING OPTICAL COMPONENTS INTEGRATED IN A MONOLITHIC PHOTONIC INTEGRATED CIRCUIT (PIC)
Granted: July 26, 2007
Application Number:
20070172169
An optical transmitter comprises a monolithic transmitter photonic integrated circuit (TxPIC) chip that includes an array of modulated sources formed on the PIC chip and having different operating wavelengths approximating a standardized wavelength grid and providing signal outputs of different wavelengths. A wavelength selective combiner is formed on the PIC chip having a wavelength grid passband response approximating the wavelength grid of the standardized wavelength grid. The signal…
Efficient Synchronization of Element Management Systems to Network Element Attributes
Granted: June 28, 2007
Application Number:
20070150620
A system, apparatus and a method are described that synchronizes multiple element management systems with a network element. The synchronization between the management entities within the element is maintained by employing special attributes, such as sentry identification for managed objects and guard attributes for managed object tables. Using these attributes, resynchronization between the management systems is improved by reducing the amount of data retrieved by the systems and…
Active delay line
Granted: June 14, 2007
Application Number:
20070133671
A delay line for deployment in an equalizer to insert a delay in a signal received by the delay line employs a plurality of cascaded delay stages where the delay per stage provided by an active unit-gain amplifier in each stage that provides sufficient impedance mismatch between the delay stages without substantial deterioration of the frequency response of the client signal undergoing deterioration of the frequency response of the client signal undergoing delay.
DEPLOYMENT OF ELECTRO-OPTIC AMPLITUDE VARYING ELEMENTS (AVEs) AND ELECTRO-OPTIC MULTI-FUNCTIONAL ELEMENTS (MFEs) IN PHOTONIC INTEGRATED CIRCUITS (PICs)
Granted: June 7, 2007
Application Number:
20070127864
Electro-optic amplitude varying elements (AVEs) or electro-optic multi-function elements (MFEs) are integrated into signal channels of photonic integrated circuits (PICs) or at the output of such PICs to provide for various optical controlling and monitoring functions. In one case, such PIC signal channels may minimally include a laser source and a modulator (TxPIC) and in another case, may minimally include a photodetector to which channels, in either case, an AVE or an MFE may be…
