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| Number | Title | Issue Date |
| 7945171 | Optical pulse time spreader and optical code division multiplexing transmission device A phase control arrangement has a structure in which a Superstructured fiber Bragg Grating (SSFBG) 40 has fifteen unit Fiber Bragg Gratings (FBGs) arranged in series in a waveguide direction. The SSFBG 40 is fixed to the core of an optical fiber 36 | 05/17/2011 |
| 7869718 | Power monitoring photo eye controller A wireless, automatic door obstruction detection system for protecting a motorized door or gate by signaling various hazardous conditions and reacting to said conditions by signaling control means. The invention utilizes wireless infrared emitter, receiver and contr... | 01/11/2011 |
| 7515835 | System, method and apparatus for clockless PPM optical communication A PPM transmitter includes an optical clock generator for generating equally-spaced optical pulses with a sampling period T; an encoder for transforming an incoming waveform U(t) into a linear combination V(t) of U(t) and a delayed output V(t−kT) according to a ru... | 04/07/2009 |
| 7430376 | All-optical delay generator for PPM communication systems based on a non-linear waveguide with a chirped DBR An all-optical PPM modulator comprises one or more sources of trains of optical control pulses and optical signal pulses, the optical control and optical signal pulses being equally spaced, but differentiated from one another by at least having different optical wav... | 09/30/2008 |
| 7415212 | Data communication system, data transmitter and data receiver A transmitter formed of two or more light-emitting sections such as LEDs, which are physically arranged in a predetermined manner, is disposed in the real world object, and each light-emitting section transmits data by flashing at a flashing pattern representing the... | 08/19/2008 |
| 7369609 | Duty factor encoded data and clock transmission A method, apparatus, article of manufacture, and a memory structure for transcieving data and a clock on a single data stream. The method comprises the steps of receiving an encoded data stream, the encoded data stream generated by encoding a data stream by a duty f... | 05/06/2008 |
| 7350307 | System and method for checking mechanical pieces, with wireless signal transmission A system for detecting the position and/or the dimensions of mechanical pieces (3) includes a checking probe (1) with detection devices (2) and a remote transmitter (4), a receiver (7) being remotely placed from the probe to wirele... | 04/01/2008 |
| 7336906 | Optical signal transmission An optical signal transmission apparatus for transmitting a plurality of data signals comprising a plurality of inputs for receiving a respective one of the data signals and delivering the respective data signal with a controlled phase and at a controlled data rate.... | 02/26/2008 |
| 7330304 | Method and apparatus for PPM demodulation using a semiconductor optical amplifier An optical pulse position modulation receiver relying on the gain dynamics in a semiconductor optical amplifier (SOA). Optical PPM signal pulses and periodic optical clock pulses at a different frequency and/or polarization than the signal pulses are coupled into an... | 02/12/2008 |
| 7324760 | Apparatus and method for phase synchronization control in RZ optical transmitter An optical RZ transmitter comprises an optical signal source and a pair of electro-optical modulators in tandem, one arranged to receive a NRZ electrical data signal and the other a clock signal at the data rate of the data signal. The phase difference between the d... | 01/29/2008 |
| 7313326 | Method to inject pilot tone into microcontroller-supervised DWDM transmitters The power of a digital signal such as an optical data stream is set via digital-to-analog converter having a reference input for connection to a DC reference signal. The pilot tone is injected into the reference input of the digital-to-analog converter. In the place... | 12/25/2007 |
| 7302190 | Optical communication system including replaceable electro-optic and opto-electric converters In an optical transmitting or receiving apparatus, a plurality of replaceable electro-optic converters or a plurality of replaceable opto-electric converters are provided in correspondence with optical transmission lines. ... | 11/27/2007 |
| 7292792 | High speed modulation of optical subcarriers A method for transmitting digital data includes splitting a coherent optical carrier having a subcarrier into mutually coherent optical carriers, producing corresponding sequences of phase shifts in each of the mutually coherent optical carriers, and then, interferi... | 11/06/2007 |
| 7240233 | Hybrid parallel/serial bus interface A hybrid serial/parallel bus interface has a data block demultiplexing device. The data block demultiplexing device has an input configured to receive a data block and demultiplexes the data block into a plurality of nibbles. For each nibble, a parallel to serial co... | 07/03/2007 |
| H2190 | Sampled analog transmission Analog information is modulated onto a high repetition rate optical pulse stream. This modulated pulse stream is transmitted over optical medium, such as long distances of fiber, and is then detected. The pulses are removed leaving only the original analog signals. ... | 06/05/2007 |
| 7200337 | Optoelectronic transceiver having dual access to onboard diagnostics An optoelectronic transceiver includes first and second controller ICs. Each controller IC includes logic, a memory, an interface, and at least one input port. Each memory is configured to store digital diagnostic data and has a unique serial device address to allow... | 04/03/2007 |
| 7194211 | Method and system for 80 and 160 gigabit-per-second QRZ transmission in 100 GHz optical bandwidth with enhanced receiver performance Optical transmitter/receivers for use in a DWDM systems are provided. Transmission of data signals in a quadrature-return-to-zero (QRZ) format achieves a data transmission rate equal to eight times a base data rate, i.e., 80 Gbps over a 100 GHz channel if the base d... | 03/20/2007 |
| 7187872 | Broadband pulse width modulation circuit and optical amplifier using the same A broadband pulse width modulation circuit is provided which can achieve high speed responsibility while assuring an advantage of a pulse width modulation (PWM) circuit having a good power efficiency in order to satisfy a demand for reduction of power consumption an... | 03/06/2007 |
| 7183823 | Method of generating a pulsed output signal from a periodic ramp signal and a reference voltage, and a switch mode power converter In the proposed method of generating a pulsed output signal from a periodic ramp signal and a reference voltage, the linear range of duty cycles of the pulsed output signal is significantly extended to minimum values. The ramp signal and the reference voltage are ap... | 02/27/2007 |
| 7149430 | Optoelectronic transceiver having dual access to onboard diagnostics The optoelectronic transceiver includes first and second controller ICs. Each controller IC includes logic, a memory, an interface, and at least one input port. Each memory is configured to store digital diagnostic data and has a unique serial device address to allo... | 12/12/2006 |
| 7146109 | Analog modulation of optical signals An optically modulated signal is generated for use in transporting data by generating a so-called sub-carrier modulated optical signal and, then, vector modulating the sub-carrier modulated optical signal to yield the desired modulated optical signal for transmissio... | 12/05/2006 |
| 7142787 | Optical data transmission method and its system, optical transmitter and its method, and optical switcher This invention discloses a method to easily extract a header from an optical packet. An optical data transmission method to transmit an optical packet composed of a header and data containing steps of generating a second clock which has a frequency equal to one inte... | 11/28/2006 |
| 7136419 | Pulse width communications using precision timing Systems and methods are described for pulse communications using precision timing. A method includes digitally pulse coding a data stream; and modulating a carrier signal using the digitally pulse coded data stream. ... | 11/14/2006 |
| 7130498 | Multi-layer optical circuit and method for making A multi-layer optical circuit has a plurality of optical circuit layers. Each optical circuit layer is positioned on a corresponding one of a plurality of substrates. An optical fiber extends between at least two of the optical circuit layers and forms a portion of ... | 10/31/2006 |
| 7127182 | Efficient optical transmission system A transmitter for optical communication systems includes a source of optical radiation, a source of complex non-information signals, and a modulator unit in communication with the source of optical radiation. The modulator unit is also in communication with the sour... | 10/24/2006 |
| 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 |
| 7116916 | Method and apparatus for compacting data in a communication network A pulse width of a pulse having a nominal pulse width is modulated in accordance with a digital value to be communicated. The number of clock cycles that the modulated pulse width exceeds the nominal pulse width is counted. Various embodiments use a counter to deter... | 10/03/2006 |
| 7110681 | Method and apparatus for optical transmission Binary information is subjected to RZ encoding and multi-level encoding, and the encoded signal is optically modulated. ... | 09/19/2006 |
| 7106976 | Optical transmitter This invention provides an optical transmitter in which reduced power consumption is achieved by, when a signal generator needs data transmission, driving a laser emitting device to perform emission. An optical transmitter includes a receiver, a laser driving circui... | 09/12/2006 |
| 7092641 | Method and apparatus for optical transmission of wavelength-encoded modulation formats A system that transmits amplitude modulated data in a wavelength-encoded format and then uses a wavelength-sensitive receiver to convert the received optical signal back to the original amplitude modulated data. This system enables transmission of optical signals th... | 08/15/2006 |
| 7072408 | Method and system for using power lines for signaling, telephony and data communications The present invention provides a burst mode power line data network system having at least one burst mode power line transmitter (BMPLT) and at least one burst mode power line receiver (BMPLR) for enabling signaling, telephony and data communications via power lines... | 07/04/2006 |
| 7068946 | Modulation scheme for tedons A system and method for increasing transmission distance and/or transmission data rates using tedons and an encoding scheme to reduce the number of ones in a data signal is described. For example, the method for increasing transmission distance and transmission data... | 06/27/2006 |
| 7035542 | All-optical high bit-rate multiplexer The present invention propose to use an optical multiplexer associated with an optical clock as a wavelength converter. Each RZ coded tributary will be carried by a single wavelength (channel) passively interleaved with the others without interferometric interaction... | 04/25/2006 |
| 7023890 | Digital optical sourcing and methods of operating a digital optical source Digital optical sources and methods of operating the same are described. In one aspect, a digital optical source includes a laser, an optical intensity modulator, and a drive circuit. The laser is operable to generate light of higher output optical power in a high o... | 04/04/2006 |
| 7013091 | Synchronization of pulse and data sources In accordance with the present invention, an improved method is provided for synchronizing a pulse stream with a data stream in an optical communications system. The improved method includes: generating an optical data signal for transmission through the optical com... | 03/14/2006 |
| 6999221 | Bimorphic polymeric photomechanical actuator A bimorphic polymeric photomechanical actuator, in one embodiment using polyvinylidene fluoride (PVDF) as a photosensitive body, transmitting light over fiber optic cables, and controlling the shape and pulse duration of the light pulse to control movement of the ac... | 02/14/2006 |
| 6993016 | Methods and apparatus for transmission of analog channels over digital packet networks Methods and apparatus are provided for tunneling (transparently transmitting) over a packet network, from a source to a destination, the spectrum of one or more bandpass channels individually selected from a larger spectrum at the source. Each channel is selected, t... | 01/31/2006 |
| 6977966 | Bidirectional optical communications having quick data recovery without first establishing timing and phase lock A method of transmitting and rapidly recovering a burst of data without first having to establish a timing or phase lock. The signals are transmitted as modified Manchester coded signals having pulse transitions at a clocking pulse rate which is a multiple of the cl... | 12/20/2005 |
| 6961521 | Method and apparatus for transmitting a bit interleaved optical data stream on an optical network A method and apparatus for transmitting a bit interleaved optical data stream on an optical network is disclosed. In one embodiment, the network includes multiple transmitters that are enabled to transmit an optical bit during established time slots that correspond ... | 11/01/2005 |
| 6941077 | Memory mapped monitoring circuitry for optoelectronic device Circuitry for monitoring operation of an optoelectronic device having a laser transmitter and a photodiode receiver includes analog to digital conversion circuitry for receiving a plurality of analog signals from the laser transmitter and photodiode receiver, conver... | 09/06/2005 |
