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US20050265731 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...
US20110069972 MULTIPLEXED QUANTUM KEY DISTRIBUTION  
The present invention relates to an improved quantum signal transmitter, which has a plurality of quantum output channels having at least one optical source and at least one optical splitter...
US20120183306 OPTICAL TRANSMITTER INCLUDING EA MODULATOR AND DRIVER  
An optical transmitter to drive the EA modulator integrated with an LD in a mode of lowered power consumption. The optical transmitter includes the optical device integrating the LD with the EA...
US20070223937 All-Optical Converter  
The invention concerns an all-optical converter ( 10 ) for converting an intensity-modulated optical signal into an optical signal modulated to the DPSK format, characterised in that it comprises:...
US20050078965 RZ-AMI optical transmitter module  
Disclosed is an optical transmitter module comprising: a precoder to generate an encoded binary signal from an electric signal; an amplifier to amplify the binary signal; a converter to convert...
US20100092183 FREQUENCY TUNABLE TERAHERTZ CONTINUOUS WAVE GENERATOR  
A frequency tunable terahertz continuous wave generator controls the number of feedbacks of an optical signal output from an optical intensity modulator by adding a feedback loop between input and...
US20150063826 OPTICAL WAVEGUIDE WITH CASCADED MODULATOR CIRCUITS  
An optical waveguide for transmitting an optical signal input to the optical waveguide with a first frequency. The optical waveguide includes a plurality of modulator circuits configured along an...
US20150229404 HITLESS MODULATION SCHEME CHANGE SYSTEMS AND METHODS IN OPTICAL NETWORKS  
A hitless modulation change method at a node in an optical network includes determining that a modulation change is warranted for an optical modem in the node, the optical modem configured to...
US20090180785 OPTICAL TRANSMITTER, OPTICAL TRANSMISSION SYSTEM AND MODULATION SCHEME SELECTION METHOD  
The present invention provides an optical transmitter, an optical transmission system and a modulation scheme selection method capable of selecting either of an optical duobinary modulation scheme...
US20080199188 Interferometric communication  
Embodiments of interferometric communication are disclosed.
US20090136240 Balanced Phase-Shaped Binary Transmission In Optical Communications  
Optical communication apparatus, methods, systems are provided based on balanced-detection phase-shaped binary transmission (BD-PSBT).
US20060110167 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...
US20090310976 Illuminative light communication system  
An light source control unit controls the flashing of a light source and the light amount of a light source according to information to be transmitted. Thus, light, which is modulated according to...
US20100003035 LASER DIODE HAVING AN ABRUPT TURN-ON, OPTICAL TRANSMITTER DEVICE USING THE SAME LASER DIODE AND OPTICAL COMMUNICATION APPARATUS  
Provided are a laser diode which has low power consumption and can realize a high on/off extinction ratio by small variation of current and which can modulate optical signals at high speed, an...
US20060257151 (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...
US20140321863 MULTIPLE LEVEL SIGNALING FOR PASSIVE OPTICAL NETWORKS  
A technique in which an outgoing signal is encoded to have multiple signal levels to modulate a light source, in which respective signal levels are indicative of different signal states of more...
US20140147117 OPTICAL MULTILEVEL SIGNAL PRE-EQUALIZATION CIRCUIT, OPTICAL MULTILEVEL SIGNAL PRE-EQUALIZATION TRANSMITTER, AND POLARIZATION-MULTIPLEXED PRE-EQUALIZATION TRANSMITTER  
In order to reduce the circuit size for a chromatic dispersion pre-equalization operation, an optical multilevel signal pre-equalization circuit is provided with: (1) a plurality of look-up tables...
US20070206958 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...
US20060140642 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...
US20060051103 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...
US20050238365 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...
US20110255875 DUAL RATE QPSK/TCM-QPSK OPTICAL MODULATION  
The present disclosure allows for optical link capacity to be optimized based on transmission parameters, such as amplifier gain, link loss, optical signal-to-noise ratio. For example, optical...
US20090274470 Optical Code Communication System  
An optical code communication system comprises an optical transmitter, an optical receiver, and an optical transmission line. The optical receiver has an optical mixing decoder for mixing a coded...
US20060072924 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...
US20080193143 Chirp-managed, electroabsorption-modulated laser  
An optical transmitter comprising: an optical source modulated with an input digital data signal so as to generate a first, frequency-modulated digital signal; andan amplitude modulator, modulated...
US20070206956 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...
US20080037997 Optical sending apparatus and optical transmission system  
The invention provides an optical sending apparatus which improves the characteristics near zero dispersion without sacrificing the characteristics at high dispersion in an optical duo binary...
US20100003036 Communication apparatus and signal reception method  
A communication apparatus in accordance with an embodiment comprises a reception unit configured to demodulate a received signal to output a first demodulated signal in dependence on a reception...
US20070237527 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...
US20140133867 PRE-EQUALIZED OPTICAL TRANSMITTER AND PRE-EQUALIZED OPTICAL TRANSMISSION METHOD  
A pre-equalization optical transmitter includes: a tap coefficient selecting unit for saving, in advance, a tap coefficients for generating an RZ pre-equalization signal and an NRZ...
US20070009268 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...
US20090123162 CONTROLLER FOR OPTICAL TRANSMISSION DEVICE  
A controller supplies a driving signal to an optical modulator for modulating light from a light source in accordance with the driving signal, a low frequency signal being superposed on the...
US20050265730 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...
US20070264027 Dispersion compensating circuits for optical transmission system  
Improved dispersion compensating circuits for optical transmission systems are disclosed. According to the improved method, there is provided a compensation circuit comprising a varactor diode...
US20120002978 OPTICAL SINGLE-SIDEBAND TRANSMITTER  
A method for generating an optical single sideband signal comprising the steps of splitting an optical field into two parts and introducing a relative phase delay of +/−π/4 radians in each...
US20080019703 Optical Transmitter Using Nyquist Pulse Shaping  
An optical data transmitter includes a symbol generator that generates a stream of symbols having a symbol rate. A Nyquist filter that is electrically connected to the symbol generator generates a...
US20080175598 Software-based electro-optic modulator bias control systems and methods  
The present invention provides a software-based electro-optic modulator bias control system resident in an optical transceiver including an electro-optic modulator that includes an...
US20060062582 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...
US20050019040 Optical communication system and method using spread-spectrum encoding  
Using spread-spectrum encoding the spread the spectrum of information signals transmitted in an optical communications system enables significantly higher levels of inter-channel interference to...
US20070280700 NOISE TONE AVOIDANCE IN OPTICAL NETWORKS  
Identification of optical channels in wavelength division multiplex (WDM) optical networks may be confounded by unwanted noise tones interfering with pilot/dither tones used for identifying...
US20110129232 EXTERNAL MODULATOR MONITORING DEVICE AND EXTERNAL MODULATOR MONITORING METHOD  
This invention relates to external modulator monitoring device and method for monitoring an external modulator. The external modulator monitoring device includes a mixing unit for mixing optical...
US20080131141 Parallel channel optical communication using modulator array and shared laser  
An optical transmitter includes a drive laser, a 1×N splitter, and an array of modulators. The 1×N splitter is coupled to split a beam from the drive laser into separated beams, and the modulators...
US20070058987 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...
US20100021179 OPTICAL FIELD RECEIVER AND OPTICAL TRANSMISSION SYSTEM  
An optical field receiver comprises an optical brancher that branches a received optical multilevel signal into first and second optical signals; an optical delayed detector that performs delayed...
US20090123163 METHOD OF PRODUCING A HIGHLY PERMEABLE STABLE RF WAVEFRONT SUITABLE AS A DATA CARRIER  
A method for generating a highly permeable stable broadband wavefront includes generating a modulated photon wave associated with a modulated data signal, the modulated photon wave comprising...
US20080089698 Optical arbitrary waveform generation and processing using spectral line-by-line pulse shaping  
An apparatus and method is disclosed for producing arbitrary optical and electrical waveforms. The apparatus includes a means for accepting or generating a comb-like optical spectrum, and an...
US20140356001 CHIP-BASED ADVANCED MODULATION FORMAT TRANSMITTER  
In various embodiments, a monolithic integrated transmitter, comprising an on-chip laser source and a modulator structure capable of generating advanced modulation format signals based on...
US20080240732 OPTICAL COMMUNICATION MODULE AND CONTROL METHOD THEREOF  
An optical communication module includes a driving unit, an optical transmitting unit, a control unit and a signal transform control unit. The driving unit outputs a bias signal and a modulation...
US20070104492 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...
US20080152355 GENERATION OF A FULL-RATE OPTICAL DUOBINARY SIGNAL USING HALF-RATE ELECTRICAL BINARY SIGNALS  
An optical transmitter that uses half-rate electrical signals, without multiplexing them to the full rate, to generate a full-rate optical duobinary signal. In one embodiment, an optical...

Matches 1 - 50 out of 225 1 2 3 4 5 >