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Optical Communications > Transmitter > Having Particular Modulation Having Particular ModulationHaving Particular Modulation patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.10/11/07 - 20070237527 - Optical debug mechanism A method for performing analysis of electrical signals in a system is disclosed. The system includes at least two circuit elements between which an electrical signal is transmitted. The method converts the electrical signal to dual optical signals, one of which is converted back to an electrical signal for receipt ... 09/27/07 - 20070223937 - All-optical converter an output ( 162c ) of the device adapted to modulate ( 200 ) delivering an optical signal modulated to the DPSK format ( 14 ). ... 09/13/07 - 20070212076 - Integrated optical waveform modulation A method of modulating an optical carrier. A target carrier modulation is computed based on an input data signal. An effective length of an optical modulator is then controlled based on the target carrier modulation. ... 09/06/07 - 20070206959 - Vcsel with integrated optical filter An example of an optical source includes a VCSEL and a filter. The filter is positioned on the VCSEL and is configured and arranged such that an input to the filter from the VCSEL comprises a directly modulated optical data signal, and a corresponding output of the filter comprises an ... 09/06/07 - 20070206958 - Optical beamforming transmitter The present invention provides an optical beamforming RF transmitter. In one embodiment, the optical beamforming RF transmitter includes an optical WDM splitter having an input and a plurality of outputs. The optical beamforming RF transmitter also includes an array of antennas, where each antenna has an optical input configured to ... 09/06/07 - 20070206957 - Method for changing frequency and base station in radio optical fusion communication system In a radio optical fusion communication system with the integration of an optical fiber transmission path and a radio propagation path, wherein by first and second light sources, an intermediate-frequency signal generating means for generating a modulating signal at an intermediate frequency band, a modulator for modulating an optical signal ... 09/06/07 - 20070206956 - Optical transmitting device, optical transmission system, optical transmitting method and optical transmission method In an optical transmission system by frequency-division multiplexing, the interference due to distortions of a first signal against a second signal can be reduced. In the optical transmission system where a modulated optical signal by the first signal is further modulated with the second signal for transmission, distortions of the ... 08/16/07 - 20070189778 - Bi-directional signal interface using photonic coupler A signal interface comprises a non-reciprocal device having a first port that accepts a first electrical signal and a second port that accepts a second electrical signal. The non-reciprocal device passes the second electrical signal through the first port without a phase shift and passes the first electrical signal through ... 08/09/07 - 20070183791 - Multiformat transmitter Methods and apparatus for supporting a plurality of modulation formats using a single transmitter are disclosed. According to one aspect of the present invention, a transmitter arrangement that provides a signal to a modulator that creates an optical data stream from the signal includes an encoder and a switching/filtering arrangement. ... 07/19/07 - 20070166053 - Radio oscillating and radar systems It is provided a practical radio oscillating system for a radar system to alleviate the necessity of a reception filter of severe specification of pass band and an oscillating system and an amplifier of high performance and high reliability. The radio oscillating system has an optical modulator 2 for oscillation; ... 06/28/07 - 20070147848 - Method and apparatus for reducing clipping in an optical transmitter by phase decorrelation A method and apparatus is provided for reducing clipping arising in an optical transmitter. The method begins by generating a frequency multiplexed sub-carrier signal onto which information is modulated at a plurality of different sub-carrier frequencies. The method continues by decorrelating in phase at least some pulses that are formed ... 05/24/07 - 20070116476 - Method and apparatus for generating optical duo binary signals with frequency chirp This present disclosure provides an optical transmission method and system. The system includes a pre-coder for pre-coding an input signal into a first pre-coded signal, an encoder/separator coupled to the first pre-coded signal and arranged to encode the first and second pre-coded signals into a first encoded signal with 0 ... 05/10/07 - 20070104492 - System for and method of single slideband modulation for analog optical link This invention describes a simple method of producing optical singlesideband suppressed-carrier (SSB-SC) modulation. The SSB-SC transmitter is a Mach-Zehnder interferometric modulator followed by an optical filter. The modulator is biased for minimum transmission of the carrier. ... 04/19/07 - 20070086787 - Apparatus and method to generate carrier suppressed-return to zero optical signal Provided are an apparatus and a method for generating a CS-RZ optical signal. The apparatus includes: a classifier distributing an input signal into two NRZ (non-return-to-zero) signals with an identical transmission speed; a first signal transformer converting one of the two NRZ signals into a first RZ signal using a ... 03/29/07 - 20070071454 - Method and system for ultra-high bit rate fiber-optic communications A method and system for ultra-high bit rate fiber-optic communications (e.g., 160 Gb/s) utilize a phase-correlated modulation format where phases of bits in adjacent four-bit groups in transmitted optical pulse trains are altered by π (or 180°). ... 03/29/07 - 20070071453 - Multilevel amplitude and phase encoded signal generation A method and apparatus for generating multilevel amplitude and phase encoded signals using a pair of 1:N beam splitter/combiner(s) having a pre-defined splitting distribution and an array of zero-biased, Mach-Zehnder Modulators configured for phase modulation. ... 03/15/07 - 20070058987 - Visible light communication system and method therefor In a visible light communication system, a transmission device includes a data modulation section which assigns 1-bit information to each of visible lights of RGB, and modulates transmission data into 3-bit modulation data. An LED light emission section transmits a multiplexed visible light signal, in which the RGB visible lights ... 01/18/07 - 20070014579 - Transmission method and processing unit for a modulated optical signal A method for transmitting a modulated optical signal (S) comprising a carrier and at least two sidebands (LSB, USB) which are arranged symmetrically to a carrier wavelength (AC) from a transmitter (2) to a receiver (3) via an optical transmission link (4, 4′, 4″) comprises the steps of: separating the ... 01/11/07 - 20070009268 - System and method for transmitting data in a video signal by modulating a video signal brightness level A system and method is provided for transmitting data in a video signal by modulating a brightness level of the video signal. The invention comprises a video display unit that is capable of encoding data into a brightness level of a video signal and creating brightness modulated video images for ... 12/28/06 - 20060291870 - Signal identification in optical communications networks Signals in an optical communications network, such as optical channels in an optical WDM network for example, are each identified by at least two low frequency dither tones with which the signal is modulated. The dither tones alternate with a predetermined periodicity to produce a cyclically repeated sequence of dither ... 12/28/06 - 20060291869 - Transmitter frequency peaking for optical fiber channels Frequency peaking is used in the transmitter to improve link performance. In one example, frequency peaking improves the PIED or TWDP. The frequency peaking can result in pulse shapes that have more electrical energy in the receiver (and therefore higher received SNR) than uncompensated pulses. In addition, due to the ... 12/14/06 - 20060280508 - Optimization of mode selection in a laser resonator The so-called single-longitudinal mode of operation of a tunable laser beam source requires active control of the band-pass filters mounted in the laser resonator. As a rule, this entails one, or a combination of several filter elements, as for example birefringent filters, as well as etalons. In either case, the ... 12/14/06 - 20060280507 - Method and system for keeping time alignment between optical data modulation and a periodically modulated light source A method and system is disclosed for making time alignment for a data transmission system. A first reference clock signal is provided to a first multiplexer coupled to a data modulator through a data driver, and a second reference clock signal is provided to a second multiplexer coupled to a ... 11/30/06 - 20060269295 - Optical double sideband modulation technique with increased spectral efficiency An all optical network for optical signal traffic has at least a first ring with at least one transmitter and one receiver. The first ring includes a plurality of network nodes. At least a first add/drop broadband coupler is coupled to the first ring. The broadband coupler includes an add ... 11/23/06 - 20060263095 - Method and system for keeping timing alignment between driving signals in optical double modulation A method and system is disclosed for making timing alignment for a data transmission system, the method comprising providing a reference clock signal with a first frequency to a multiplexer through a phase shifter, generating a multiplexed signal with a second frequency by the multiplexer, wherein the second frequency follows ... 11/16/06 - 20060257151 - (d) wdm communications network using back-up light sources A communications node (Ni) for a wavelength division multiplex optical network includes local modulation means (MOD) adapted to modulate light having a selected wavelength delivered by a source (S1-S4) to deliver modulated optical signals and coupling means adapted to couple said local modulation means (MOD) firstly to a first optical ... 11/09/06 - 20060251427 - Lsi apparatus operated by optical clock In an LSI system, a short optical pulse train is guided to an optical divider which divides the short optical pulse train into first and second short optical pulse trains. A retardation of ½ of the pulse period is produced between the first and second short optical pulse trains. The ... 10/12/06 - 20060228117 - Optical transmission device and optical transmission system The subject of the present invention is to provide an optical transmitting device and an optical transmission system, capable of realizing an increase of multiple channels and an extension of a transmission distance at a low cost. In the present invention, the external modulation process is applied to a first ... 10/05/06 - 20060222372 - Mopa laser apparatus with two master oscillators for generating ultraviolet radiation Laser apparatus including two different, pulsed MOPAs, one having a fundamental wavelength of 1064 nm and the other having a fundamental wavelength of 1564 nm, provide trains of optical pulses. The 1064-nm pulses are frequency tripled to 355 nm and the 1564-nm pulses are frequency doubled to 782 nm. The ... 09/28/06 - 20060216039 - Polarization duobinary optical transmitter A polarization duobinary optical transmitter is disclosed. The transmitter includes a precoder for coding an electric signal and a light source for generating continuous light. The transmitter also includes a chirped-free modulator for generating an NRZ signal including first and second polarization light beams orthogonal to each other by modulating ... 09/21/06 - 20060210281 - Cosite interference rejection system using an optical approach A cosite interference rejection system allows cancellation of large interfering signals with an optical cancellation subsystem. The rejection system includes an interference subsystem coupled to a transmit system, where the interference subsystem weights a sampled transmit signal based on a feedback signal such that the weighted signal is out of ... 07/06/06 - 20060147219 - Optical communication system using optical frequency code, optical transmission device and optical reception device thereof, and reflection type optical communication device The invention dispenses with calibration of the optical frequency of the light source and permits the use of many codes without increasing the transmission bandwidth used. Let the optical frequency width of the light source be represented by FSR and the code length of every code be represented by FSR, ... 06/29/06 - 20060140643 - Method and apparatus for interleaved optical single sideband modulation An optical carrier notch filter includes an optical coupler with at least first, second and third ports. The first port is configured to receive an output that includes an optical carrier and interleaved optical single sideband signals. An optical bandpass filter is coupled to a port of the optical coupler. ... 06/29/06 - 20060140642 - Eliminating onu laser for wdm pon by burst mode Tuned lasers in the ONU's are eliminated in WDM PON by use of a burst mode transmission. An apparatus for communicating over a passive optical network comprises a transmitting portion operable to generate an optical signal comprising a first portion modulated with a first data signal and a second portion ... 06/29/06 - 20060140641 - Avoiding onu laser by optical modulation and remodulation Tuned lasers in the ONU's are eliminated in WDM PON by use of a burst mode transmission. An apparatus for communicating over a passive optical network comprises a transmitting portion operable to generate an optical signal comprising a first portion modulated with a first data signal and a second portion ... 06/22/06 - 20060133823 - Optical link A system having a first optical modulator operates in a non-linear region thereof and fed by: an input radio frequency signal; and, a first optical frequency signal having a wavelength λ2. A second optical modulator operates in a linear region thereof and fed by: a fractional portion of the input ... 05/25/06 - 20060110167 - Clock signal generation apparatus using asymmetrical distortion of nrz signal and optical transmission and reception system employing the same Provided are a clock component generating apparatus using an asymmetrical distortion of NRZ (non-return to zero) signal and an optical transmission and reception system employing it. The clock component generation apparatus can make an NRZ optical signal have large clock component by asymmetrically distorting the rising and the falling waveform ... 05/25/06 - 20060110166 - Detecting and locating pulses using a bragg cell Detecting a pulse of a signal includes receiving the signal and a light beam. The signal drives a spatial light modulator to modulate the light beam, where the complex amplitude of the modulated light beam is proportional to the signal current. The modulated light beam passes through an optical system ... 05/04/06 - 20060093376 - System and method for providing two-way communication of quantum signals, timing signals, and public data A system and method for providing two-way communication of quantum signals, timing signals, and public data is provided. Generally, the system contains a first public data transceiver capable of transmitting and receiving public data in accordance with a predefined timing sequence, a first optical modulator/demodulator capable of transmitting and receiving ... 04/20/06 - 20060083519 - Chirped rz-ami optical transmitter A chirped RZ-AMI optical transmitter includes a first logic gate for receiving a first signal obtained by pre-coding binary data and a second signal having a waveform obtained by inverting and delaying the first signal, and outputting a third signal obtained by logically operating on the first and second signals. ... 04/06/06 - 20060072924 - Duo-binary optical transmitter tolerant to chromatic dispersion A duo-binary optical transmitter tolerant to a chromatic dispersion includes a pre-coder for generating a first 2-level signal from input binary data and generating a second signal having a waveform obtained by inverting the first signal, a Mach-Zehnder Modulator (MZM) for generating a Differential Phase Shift Keying (DPSK) modulated optical ... 03/30/06 - 20060067708 - Emitter follower driver for silicon optical modulator According to embodiments of the present invention, an emitter follower-based or source follower-based driver is coupled to drive a silicon-based Mach-Zehnder interferometer optical modulator. In one embodiment, the emitter/source follower includes a pair of transistors that drive a differential electrical data signal to a pair of phase shifters in the ... 03/30/06 - 20060067707 - System and method for increasing data communication bandwidth in a light communication system In one embodiment, color sensors allow multiple data transfer channels to occur between a light source and a light detector. Light of differing wavelengths can be detected simultaneously and the modulated data on each wavelength can be independently and simultaneously processed. If desired, data from a selected wavelength can be ... 03/23/06 - 20060062582 - Device, system and method for providing visible light information, visible light information reader, program thereof, and computer-readable information storage medium for storing program A visible light information providing device, a visible light information reader, a visible light information providing system, a visible light information providing method, a program thereof, and a computer-readable information storage medium for storing the program, enabling a user to recognize the area to which information is provided in a ... 03/23/06 - 20060062581 - Optical transport system A method and system is disclosed to optically transport data at a data rate of about 5 Gbps without chromatic dispersion compensation. After receiving a first data stream at a data rate of about 2.5 Gbps and a second data stream at a data rate of about 2.5 Gbps, the ... 03/16/06 - 20060056855 - Illuminative light communication device The present invention has been developed considering the above-described problems and aims to provide various structures and applications for illuminative light communication. According to the first aspect of the prevent invention, a broadcast system includes an LED light source 115 for lighting, a power line 103 that supplies electric power ... 03/09/06 - 20060051103 - Multi-channel fabry-perot laser transmitters and methods of generating multiple modulated optical signals Multi-channel Fabry-Perot laser transmitters and methods of generating multiple modulated optical signals are described. In one aspect, an optical transmitter includes a Fabry-Perot (FP) laser, an optical isolator, an optical splitter, and multiple electroabsorption modulators (EAMs). The FP laser is operable to generate multimode laser light. The optical isolator is ... 02/23/06 - 20060039706 - Method and device for optical data transmission The invention relates to a method and device for optical data transmission, in particular a method for transmission of data by means of digitised infrared signals. Data sequences are transmitted using a time-division multiplex access protocol with communication frames comprising single sequential windows with a given minimal bit transmission rate. ... 02/09/06 - 20060029395 - Apparatus and method for frequency-shift-keying optical transmission An optical transmission apparatus employing an FSK scheme is disclosed. The optical transmission apparatus includes a light generator arranged to generate a first tone signal having a first frequency and a second tone signal having a second frequency. The optical transmission apparatus also includes a light modulator including a second ... 02/02/06 - 20060024067 - Optical i/o chip for use with distinct electronic chip Generally, an embodiment of the present invention provides an optical input/output (I/O) chip that is fabricated separately and distinctly from an electrical integrated circuit chip having core circuitry thereon. The electronic and optical I/O chips are later electrically connected (e.g., using packing technology) to form a hybrid optical-electronic chip system ... 02/02/06 - 20060024066 - Optical modulating device An optical modulation apparatus is provided which implements a stable amplifying function by reducing the effect of reflected light rays form end faces of a bidirectional optical amplifier by imposing a numerical limitation on the relationship between the gain of the bidirectional optical amplifier and the loss of the optical ... 01/26/06 - 20060018666 - Adiabatically frequency modulated source A Distributed Feed-Back (DFB) laser integrated with an Electroabsorption (EA) modulator whose facet at the end of EA modulator section has finite reflectively to create adiabatic chirp by optical feedback to the DFB laser. ... 12/22/05 - 20050281562 - Method for transmitting a data flow over an optical bus, corresponding system and computer program product A method for transmitting on an optical connection an input data sequence having first and second logic states, includes encoding the input data sequence prior to transmission on the optical connection, where the encoding minimizes the first logic states in the encoded data sequence. The encoding includes: arranging the input ... 12/15/05 - 20050276615 - Electroabsorption-modulated fabry-perot laser and methods of making the same Electroabsorption-modulated Fabry-Perot lasers and methods of making the same are described. In one aspect, a light source includes a Fabry-Perot (FP) laser that is operable to generate multimode laser light, an electroabsorption modulator (EAM) that is configured to selectively absorb and transmit laser light traveling therethrough, and an optical isolator. ... 12/08/05 - 20050271392 - Reach extension by using external bragg grating for spectral filtering A fiber optic system comprising a modulated signal source coupled to a spectral filtering element characterized in that the bandwidth of the optical spectrum of the signal after the spectral filtering element is reduced relative to the optical bandwidth of the spectrum before the filtering element. ... 12/01/05 - 20050265731 - Wireless terminal for carrying out visible light short-range communication using camera device Disclosed is a wireless communication system using visible light and, more particularly, a short-range wireless communication system using a camera sensor module and a flash module mounted on a wireless terminal. The wireless terminal utilizes an LED and a camera sensor selectively for performing camera functions in a wireless terminal ... 12/01/05 - 20050265730 - Optical transmission system, and trasmitter, receiver and signal level adjustment method for use therein In a transmitter (11), a peak detection section (104) detects a peak factor of a frequency division multiplexed signal which is output from a frequency division multiplex section (103). A spurious calculation section (105) instructs a gain adjustment section (106) to adjust the signal level of the frequency division multiplexed ... 11/10/05 - 20050249506 - Burst optical communication apparatus First and second carrier modulators each modulate a carrier having a different frequency from each other with a baseband input signal. First and second variable wavelength optical modulators each convert the modulated signal into an optical signal having a first or second wavelength. An optical multiplexer multiplexes the optical signals, ... 10/27/05 - 20050238366 - Multiple-wavelength optical modulation apparatus A lightwave input through an input filter is reflected between the input filter and an output filter, being modulated during each round trip, and is output via the output or input filter when the light has reached a frequency determined by the output or input filter. The time required for ... 10/27/05 - 20050238365 - Optical encoder providing a wide range of resolutions An optical encoder comprises an encoder module, an interpolator module coupled to the encoder module, and a modulator module coupled to the interpolator module. The encoder generates a first and second position signals as a function of a light signal modulated by a code wheel. The interpolator module generates a ... 10/20/05 - 20050232643 - Out-of-band data communication between network transceivers Out-of-band data communication of diagnostic or other data is performed using transceivers in a data or communication network. A light beam or other carrier is modulated with high-speed data and out-of-band data to create a double modulated data signal. A physical layer signal is created that includes modulations of the ... 10/13/05 - 20050226637 - Method of transmitting digital signals over an optical transmission system A method of transmitting digital signals over an optical transmission system is described. The method comprises the following steps: generating a signal according to the non-return-to-zero (NRZ) format, forwarding the NRZ signal to an optical delay filter, and using an output signal of the optical delay filter as a signal ... 09/22/05 - 20050207759 - Optical duo-binary transmission apparatus using polarization modulator An optical duo-binary transmission apparatus using a duo-binary modulation method is disclosed. The optical duo-binary transmission apparatus using a polarization modulator includes a precoder for coding an inputted binary data signal; a low-pass filter for converting the coded binary data signal into a three-level signal by restricting a bandwidth of ... 09/15/05 - 20050201759 - Photonic rf distribution system The present photonic RF generation and distribution system provides a system and method for distributing an RF output signal. The photonic RF distribution system includes two optical sources for generating optical signals. A first optical source (42) is operable to generate a first optical signal having an operating frequency. A ... 09/01/05 - 20050191060 - 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 data signal and the clock ... 08/18/05 - 20050180760 - Reference phase and amplitude estimation for coherent optical receiver An optical receiver demodulates optical orthogonal frequency division multiplexed signals and generates a number of subcarrier reference signals, each for demodulating a frequency channel of the frequency division multiplexed signals. It compensates for degradations in the generated reference signals by averaging a number of estimates derived from different inputs to ... 08/04/05 - 20050169641 - Two-optical signal generator for generating two optical signals having adjustable optical frequency difference A two-optical signal generator is provided for generating two optical signals, where a difference between optical frequencies or optical wavelength of the two optical signals can be adjusted. A first optical modulator modulates a single-mode optical signal generated by a first light source according to an inputted signal, and outputs ... 08/04/05 - 20050169640 - Optical communication module having at least one monolithic semiconductor photonic integrated circuit chip An optical communication module comprises at least one monolithic semiconductor transmitter photonic integrated circuit chip having a plurality of optical signal channels approximating wavelengths on a standardized grid. Each of said channels comprises a laser source optically coupled to an electro-optic modulator. The outputs of the electro-optic modulators are coupled ... 07/21/05 - 20050158059 - Broadband wireless communication system and method Free space optical communication is plagued by interruptions in the connections caused by atmospheric phenomena, such as weather. A wireless beam transmission system includes at least one transmitter (110) and accommodates several wavelengths, and at least one transmission wavelength is arranged to be chosen based on spectral absorption measurements of ... 07/07/05 - 20050147417 - Wave detection methods and apparatus Methods and apparatus for detecting waves are disclosed. The waves are detected by modulating an optical carrier signal having a carrier signal frequency component at a carrier frequency with wave signals at one or more detection frequencies, optically removing the carrier signal frequency component from the modulated optical carrier signal, ... 06/16/05 - 20050129412 - Method and apparatus for multi-band optical switching using multi-pump parametric devices A method of multiple-band switching using a multi-pump fiber parametric switch is demonstrated. The switching architecture combines parametric band amplification, wavelength conversion and selective signal conjugation, enabled by temporal control of at least one pump of the multi-pump parametric device. The switching speed of the present invention is limited by ... ### FreshPatents.com Support - Terms & Conditions |