Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 7860394 | Optical receiver and optical reception method compatible with differential quadrature phase shift keying In an optical receiver according to the present invention, an input signal light subjected to the differential quadrature phase shift keying (DQPSK) is incident on a PANDA type fiber in a linearly polarized state by 45°, so that a delay time difference correspondin... | 12/28/2010 |
| 7702240 | Optical multiplex communication system and delay quantity adjustment method The present invention is an optical multiplex communication system in which an optical wavelength division channel and an optical code division channel can coexist, wherein a WDM channel section 86 has a wavelength demultiplexer 36 and WDM channels W | 04/20/2010 |
| 7599623 | Apparatus and method of managing POTS lines in a PON network An apparatus or corresponding method of managing Plain Old Telephone Service (POTS) lines in a Passive Optical Network (PON) to prevent an alarm system from generating an alarm during a software upgrade or maintenance of an Optical Network Terminal (ONT), Optical Li... | 10/06/2009 |
| 7421203 | Method for transmitting packet in wireless access network based on wavelength identification code scheme A method for transmitting a packet in a wireless access network based on a wavelength identification code scheme. The method comprises the steps of connecting n number of RNCs (Radio Network Controllers) to one sub-ring where the “n” is a positive integer, and a... | 09/02/2008 |
| 7394985 | Wavelength access server (WAS) architecture A wavelength access server (WAS) architecture provides aggregation of traffic streams of diverse data communication protocols as well as provision of wavelength resources in an optical transport network. The WAS provides functions such as service traffic adaptation,... | 07/01/2008 |
| 7394988 | Dual band wireless communication having high availability and high bandwidth A communication system receives information from a first communication link. The communication system transfers a free-space optical signal carrying the information and transfers a high-GHz wireless signal carrying the information. The communication system receives ... | 07/01/2008 |
| 7380993 | Optical transceiver for 100 gigabit/second transmission An optical transmitter for converting and coupling an information-containing electrical signal with an optical fiber having an electrical input for coupling with an external electrical cable or information system device having a plurality of parallel data lines, a m... | 06/03/2008 |
| 7379669 | Method and apparatus for duplex communication in hybrid fiber-radio systems An apparatus and method for enabling cost-effective duplex communication by diplexing one of down stream signals for frequency up-conversion in a hybrid fiber-radio system includes diplexing an unmodulated mode signal among beating signals between a master laser and... | 05/27/2008 |
| 7349630 | Hybrid WDM/TDM network architecture A method and apparatus for configuring a server/client network architecture. A server network device impresses an optical signal onto an optical link at a specified wavelength, where distinct wavelengths are associated with one or more of a plurality of client devic... | 03/25/2008 |
| 7336902 | Integrated electro-optic hybrid communication system A system according to embodiments of the invention may comprise a first communication path that converts an optically-modulated source signal to a radio signal based on a detected degradation in a quality of a received optical signal, and a second communication path... | 02/26/2008 |
| 7330655 | WDM/SCM-PON and media access control method for asymmetric packet communication in the same The present invention relates to a WDM/SCM-PON and a media access control method for asymmetric packet communication in the same. In the WDM/SCM-PON, each SCM channel is classified and used as a link by adopting an SCM technique of subdividing a wavelength band of u... | 02/12/2008 |
| 7330656 | Passive optical network employing code division multiple access A PON and a method of transmitting data employing different upstream and downstream transmission protocols are disclosed. The PON includes: a plurality of ONTs; WDM filters; an OLT receiving and transmitting optical signals to and from the ONTs and a higher network;... | 02/12/2008 |
| 7289732 | Broadcast/communication unified passive optical network system Disclosed is a broadcast/communication unified passive optical network system. The network system comprises: an optical line termination that time-division multiplexes the received digital broadcast signals, receives communication signals through the internet, and w... | 10/30/2007 |
| 7283749 | Fiber and wire communication system This invention provides a new architecture for a communication system between head-ends and end-users which expands bandwidth and reliability of the communication system. A mux-node receives communication signals from a head-end and forwards the received communicati... | 10/16/2007 |
| 7283694 | Transmitter photonic integrated circuits (TxPIC) and optical transport networks employing TxPICs 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 o... | 10/16/2007 |
| 7254333 | Low-cost WDM terminal device accommodating plurality of client signal A WDM (Wavelength Division Multiplex) terminal device located in a WDM network includes a multiplexing unit that multiplexes a wavelength of a client signal having a single wavelength or a wavelength of at least one of a first plurality of client signals whose wavel... | 08/07/2007 |
| 7224901 | All-optical packet routing gates and demultiplexing systems An all-optical packet gating and routing system, comprising: first optical divider having first input and a plurality of outputs for receiving optical packets at the first input and directing the packets to each of the plurality of outputs, the optical packet... | 05/29/2007 |
| 7212744 | Receiver circuit and transmitter circuit The invention provides a transceiver circuit for communication that enhances the operation frequency of a synchronous digital circuit up to the maximum frequency of a flip-flop and inhibits the occurrence of jitters. A clock signal synchronized with data at f... | 05/01/2007 |
| 7209739 | Method and system for processing calls within a local micro network A method and system for processing calls in a telecommunications system using fiber extender loops providing a local micro network. Calls originating from subscribers within the local micro network to subscribers that are also provided service within the local micro... | 04/24/2007 |
| 7202996 | Optical amplifier For setting the optical gain of an optical amplifier such as a Raman amplifier that is connected in a wavelength division multiplexing (WDM) system, the gain of the amplifier is made dependent on the states of optical polarizers connected to individual inputs of a W... | 04/10/2007 |
| 7194001 | Time division multiplexing over broadband modulation method and apparatus A packet switch router that processes downstream digital information to provide dedicated bandwidth to each subscriber destination on a hybrid fiber coax (HFC) network. The router includes a network module that terminates a network connection, a switch that forwards... | 03/20/2007 |
| 7167651 | System and method for code division multiplexed optical communication A system for optical communication forms a family of orthogonal optical codes modulated by a data stream. The orthogonal codes are formed by creating a stream of evenly spaced-apart pulses using a pulse spreader circuit and modulating the pulses in amplitude and/or ... | 01/23/2007 |
| 7164862 | Transmitting an optical signal with corresponding WDM and TDM channels An optical signal transmitter is disclosed that transmits an optical signal with corresponding Wavelength Division Multiplexing (WDM) channels and Time Division Multiplexing (TDM) channels. The transmitter is comprised of a laser, a dispersion system, and a modulato... | 01/16/2007 |
| 7158724 | Method of detecting switching subnodes for switching wavelength division multiplexes A method of detecting switching subnodes in a monoblock wavelength division multiplex optical switching node, each subnode corresponding to a given level of granularity and to a given switching function. The method includes collecting information concerning how traf... | 01/02/2007 |
| 7154670 | Methods and apparatus for polarization control Methods and apparatus of performing polarization control for optical transmissions. The methods and apparatus enable polarization control devices to achieve a desired output state of polarization regardless of the input state of polarization. The desired state of po... | 12/26/2006 |
| 7136546 | Method and apparatus of monitoring and controlling the emission wavelengths of a plurality of laser sources integrated on the same chip or in the same photonic integrated circuit (PIC) A method and apparatus operates an array of laser sources as an integrated array on a single substrate or as integrated in an optical transmitter photonic integrated circuit (TxPIC) maintaining the emission wavelengths of such integrated laser sources at their targe... | 11/14/2006 |
| 7130499 | Optical communication module utilizing plural semiconductor transmitter photonic integrated circuit (TxPIC) chips An optical communication module comprises a plurality of monolithic semiconductor transmitter photonic integrated circuit (TxPIC) chips each having a plurality of optical signal channels approximating wavelengths on a standardized grid. Each of the channels comprise... | 10/31/2006 |
| 7127174 | Hybrid-integrated high-speed OTDM module A novel optical time division multiplexing (OTDM) module based on hybrid-integrated optical chips is disclosed. An integrated modulator chip generates optical RZ signal streams which are then interleaved in an integrated time-delay chip to produce an OTDM signal. Th... | 10/24/2006 |
| 7120364 | Optical modulator and method for polarization bit interleaving The invention relates to optical communications using techniques for providing efficient high speed polarization bit interleaving. One common architecture for high-speed time-division-multiplexing employs two modulators having a same bit rate, wherein two separately... | 10/10/2006 |
| 7110677 | Method and system for optical time division multiplexed fiber communications with coherent detection The present invention relates to a receiver for receiving a time division multiplexed (TDM) optical signal, which is formed of a plurality of interleaved optical pulse streams. Each optical pulse stream includes a plurality of optical pulses. The receiver includes a... | 09/19/2006 |
| 7106968 | Combined SONET/SDH and OTN architecture Architecture for efficient processing of the evolving OTN transmission technology, standardized under ITU-T G.709, in conjunction with existing and emerging SONET/SDH protocol signals, standardized under ANSI T1.105/ITU-T G.707. The new architecture allows processin... | 09/12/2006 |
| 7076169 | System and method for orthogonal frequency division multiplexed optical communication A system for optical communication send optical signals over a plurality of wavelength channels. Each wavelength channel comprises a number of orthogonal subchannel frequencies which are spaced apart from one another by a predetermined amount. Each of the subchannel... | 07/11/2006 |
| 7068937 | Fiber and wire communication system This invention provides a new architecture for a communication system between head-ends and end-users which expands bandwidth and reliability of the communication system. A mux-node receives communication signals from a head-end and forwards the received communicati... | 06/27/2006 |
| 7020394 | Method and apparatus for path selection and wavelength assignment in an optical network A method and apparatus for determining a shortest path between a source node and a destination node in an optical network of nodes interconnected with optical transmission links is disclosed. A wavelength graph is used to represent an optical network as a set of ele... | 03/28/2006 |
| 7020396 | Opto-electronic ultra-wideband signal waveform generator and radiator A method and apparatus for generating an arbitrary UWB waveform are presented. An optical comb generator generates a serial stream of optical tones and an optical beating tone. A serial-to-parallel converter receives the serial tones and converts them into parallel ... | 03/28/2006 |
| 6990121 | Method and apparatus for switching data of different protocols A method and apparatus for switching data of different protocols through a network are described. In one embodiment, a method includes receiving data from a number of interfaces. Additionally, the method includes switching the data through a first switch fabric upon... | 01/24/2006 |
| 6947421 | System method for the automatic routing of data packets in an optical data packet stream At the transmitter end, route information is converted to allocated frequency mixes that are used to produce route signals by modulating a carrier signal. The route signals produced are placed in front of and/or after at least one data packet and are transmitted wit... | 09/20/2005 |
| 6907158 | Configurable optical add/drop multiplexer with partial or complete wavelength drop capability An arrangement is provided for a configurable optical add/drop multiplexer (OADM) mechanism. The configurable OADM mechanism comprises at least one configurable optical add/drop multiplexer (C-OADM) module and at least one switch associated with the C-OADM modules (... | 06/14/2005 |
| 6891841 | Time division multiple access over broadband modulation method and apparatus A communication system is disclosed for providing dedicated bandwidth to at least one subscriber location for transmitting to a common point of distribution via an HFC network. In an embodiment of the invention, the communication system includes a channel interface ... | 05/10/2005 |
| 6889007 | Wavelength access server (WAS) architecture A wavelength access server (WAS) architecture provides aggregation of traffic streams of diverse data communication protocols as well as provision of wavelength resources in an optical transport network. The WAS provides functions such as service traffic adaptation,... | 05/03/2005 |
