Quotables
"The radio craze will die out in time."
Thomas Edison ; 1922
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7769298 | Light source in optical transmission system, waveform shaper, optical pulse train generator and optical reproduction system The present invention provides a pulse train generator comprising: a dual-frequency signal light source for generating a dual-frequency signal; a soliton shaper for soliton-shaping output light from the dual-frequency signal light source; and an adiabatic soliton co... | 08/03/2010 |
| 7593643 | Method and apparatus for femtosecond communication Apparatus and methods for providing a drive laser beam to a communication unit responsive to the drive laser beam provide the communication unit the ability to provide femtosecond communication. In an embodiment, the communication unit may be configured as an emitte... | 09/22/2009 |
| 7373086 | Standard radio frequency signal generating method and standard radio frequency signal generating device With a single laser light source, the line width of a beat signal is set to a few tens of kHz or less without it fluctuating over time, and the frequency thereof is set as desired. CW light from a CW laser light source is input into an electroabsorption modulator to... | 05/13/2008 |
| 7362976 | Generating of high rate modulated pulse streams The present invention provides an all optical system for generating high rate modulated signals including: a generator for generating a first periodic signal at a first rate; an optical chopping device arranged to receive the first periodic signal for producing a se... | 04/22/2008 |
| 7352970 | Dispersion management system for soliton optical transmission system A dispersion management system for soliton or soliton-like transmission systems comprises a length of optical fiber (L) in which a plurality of sections (I) made up of components (N,A) of opposite sign dispersions are concatenated together. The duration of the dispe... | 04/01/2008 |
| 7336856 | Optimum delay length for a PMD compensator A method for selecting an optimum delay length in a polarization mode dispersion (PMD) compensator configured with a constant-length delay line and deployed in an optical communication system. The optimum delay length depends on the data modulation format, bit rate,... | 02/26/2008 |
| 7286771 | Multi-channel optical transmitter incorporating a tunable optical signal source and method for transmitting a multi-channel optical signal The multi-channel optical transmitter is composed of a tunable optical signal source, an optical multiplexer and an intensity reducer. The tunable optical signal source includes a tunable laser, and additionally includes an optical signal output through which it out... | 10/23/2007 |
| 7239268 | Method and apparatus for minimizing the number of power amplifiers required under multiple transmission conditions The number of power amplifiers required to amplify a plurality of transmission signals is reduced by using non-linear transmission lines (NTL) circuits. In general, a “combining” NTL circuit is used to combine the plurality of transmission signals to form a soli... | 07/03/2007 |
| 7082268 | 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... | 07/25/2006 |
| 7076174 | Method, device, and system for processing optical signal The present invention relates to a method for processing an optical signal is provided. An optical signal is input into an optical waveguide structure for providing a nonlinear effect. As a result, the optical signal undergoes chirping induced by the nonlinear effec... | 07/11/2006 |
| 7068886 | Millimeter wave oscillator using fiber Bragg grating Provided is a millimeter wave oscillator for generating a high frequency signal required in wireless communication. The millimeter wave oscillator uses an overwritten fiber Bragg grating and a light detector such that two wavelengths in a certain phase relationship ... | 06/27/2006 |
| 7050722 | Synchronous optical regenerator using intensity modulation and phase modulation by the crossed kerr effect A synchronous optical regenerator applies intensity modulation and phase modulation. The phase modulation is effected after the intensity modulation by the crossed Kerr effect in a Kerr fiber. The clock used for the phase modulation is obtained by injecting a contin... | 05/23/2006 |
| 7039324 | Method, device, and system for regenerating optical signal The present invention relates to a method for regenerating an optical signal suitable for WDM (wavelength division multiplexing). In this method, an optical signal is supplied to an optical waveguide structure (e.g., optical fiber) for providing a nonlinear effect. ... | 05/02/2006 |
| 7023601 | Optical E-field modulation using a Mach-Zehnder interferometer A method for modulating the E-field of an optical carrier signal utilizes a Mach-Zehnder modulator having a pair of independently controllable branches. A pair of independent branch drive signals VL(t) and VR(t) are derived. Each branch of the ... | 04/04/2006 |
| 6950611 | In-line polarization monitoring and control in lightwave communication systems Polarization monitoring and control in a lightwave communication system is achieved by using an in-line polarimeter in conjunction with a polarization controller. The devices are readily compact, accurate and therefore capable of implementation in a variety of syste... | 09/27/2005 |
| 6931213 | Regenerator for a wavelength division multiplex transmission system The invention relates to wavelength division multiplex fiber optic transmission systems. It proposes a regenerator including a demultiplexer for separating the signals of various channels, a plurality of optical modulators each receiving signals from the demultiplex... | 08/16/2005 |
| 6876818 | Method and system for transmitting signals with spectrally enriched optical pulses A system and method for transmission of data modulated spectrally enriched optical pulses via an error free propagation region of an optical fiber, in which the optical pulses generated by an optical transmitter have a spectrum that is substantially wider than the s... | 04/05/2005 |
| 6760110 | Low coherent reflectometer A low coherent reflectometer uses low coherent beams for measurement of refletance and refleting positions with respect to a measured optical circuit which includes a reflecting point. The low coherent beams are branched to produce measurement beams (DL) and local b... | 07/06/2004 |
| 6694103 | Method for switching, amplification and modulation of unidirectional distributively coupled pulses and waves The invention concerns the area of nonlinear fiber and integrated optics, to be exact the area of completely optical switches, modulators and optical transistors, in which solitons are used. The technical problem of the invention is the diminution of pump... | 02/17/2004 |
| 6674973 | Double filtering fiber optic soliton signal transmission system The invention concerns a fiber optic soliton signal transmission system comprising a signal amplifier means and signal regenerator means, in-line first filter means and second filter means associated with the regenerator means, the second filter means bei... | 01/06/2004 |
| 6650452 | Optical communications A dispersion management system for soliton or soliton-like transmission systems comprises a length of optical fiber (L) in which a plurality of sections (l) made up of components (N,A) of opposite sign dispersions are concatenated together. The duration o... | 11/18/2003 |
| 6486990 | Method and apparatus for communicating a clock signal in a soliton optical transmission system A sub-harmonic clock signal is provided in a series of soliton optical pulses that are transmitted at a given line rate in a soliton optical transmission system. The line rate defines time slots of equal duration. Each soliton optical pulse in every N tim... | 11/26/2002 |
| 6342962 | Optical system for transmitting data in soliton format A system for transmitting signals in the form of soliton pulses over long distances using an optical conductor minimizes distortion of the transmitted soliton pulses using, in combination, a phase modulator to prevent temporal jitter of the soliton pulses... | 01/29/2002 |
| 6323979 | Regenerator with optical modulation for optical fiber transmission systems using soliton signals The invention relates to a regenerator using optical phase modulation in an optical fiber transmission system using soliton signals. According to the invention, the soliton signal is modulated by a clock in a modulator which is itself contained in an inte... | 11/27/2001 |
| 6259542 | Method and apparatus for monitoring dispersive-wave energy to indicate and optimize soliton transmission performance An embodiment includes a gating device, a feedback device and a control device. Soliton pulses are received by the gating device, which detects and monitors a dispersive-wave between adjacent soliton pulses using a timing circuit. The timing circuit typic... | 07/10/2001 |
| 6249630 | Apparatus and method for delivery of dispersion-compensated ultrashort optical pulses with high peak power An apparatus and method for delivery of high peak power pulse through an optical fiber to an optical device includes an ultrashort pulsed laser source which produces ultrashort optical pulses having high peak power. Prior to transmitting the optical pulse... | 06/19/2001 |
| 6243181 | Reduction of collision induced timing jitter by periodic dispersion management in soliton WDM transmission Collisions between solitons in different frequency channels are one of the major sources of errors in transmission systems that utilize wavelength division multiplexing (WDM). Moreover, because standard transmission lines have lumped amplification, the fo... | 06/05/2001 |
| 6239893 | Very high data rate soliton regenerator The invention provides a regenerator for very high rate solitons, the regenerator comprising a non-linear loop mirror or NOLM receiving the soliton signal and modulating it with a control signal. The regenerator also comprises a device for generating the ... | 05/29/2001 |
| 6201621 | Optical regeneration for optical-fiber transmission systems for non-soliton signals A method of regenerating non-soliton RZ optical signals, the method including the steps of: a compression step, whereby the RZ signals are compressed into soliton-type signals; a modulation step whereby synchronous optical modulation is performed on the s... | 03/13/2001 |
| 6185025 | Method and apparatus for transmitting information An optical communications system comprises a laser (10) controlled to output a stream of soliton pulses (12) coupled to a beamsplitter arrangement (14, 20, 22) which converts the pulse stream (12) to a stream of pulses (24) having twice the pulse rate. Th... | 02/06/2001 |
| 6163638 | Article comprising an optical pulse compressor Optical pulse compression is of importance in very high bit rate optical fiber communication systems. We are disclosing an adiabatic optical pulse compressor that can achieve substantial compression by means of a relatively short (e.g., about 100 cm) chir... | 12/19/2000 |
| 6147788 | Guiding filters for wavelength division multiplexing in soliton transmission In soliton transmission, third order dispersion of the transmission fibers tends to cause unacceptable variation in the filter strength parameter, η over the wide wavelength bands required for massive wavelength division multiplexing (WDM). The effect of... | 11/14/2000 |
| 6134038 | Optical signal for a soliton optical transmission system In a soliton transmission system, the invention proposes sending a signal constituted by a periodic series of solitons, each having a width lying in the range 0.20 times to 0.33 times the period of the signal. In such a signal, interaction between the sol... | 10/17/2000 |
| 6130767 | Method and apparatus for conditioning optical solitons At a receiver a 20 Gbit/s soliton bit stream is demultiplexed into two 10 Gbit/s bit streams using a 2-way splitter, a clock extraction circuit, and a pair of polarization insensitive amplitude modulators exhibiting positive chirp. The outputs of the modu... | 10/10/2000 |
| 6008921 | Methods and apparatus for converting remote control signals into computer keyboard signals A computer system adapted to receive and interpret signals from a remote control. The signals received from the remote control are interpreted and transformed into signals equivalent to those produced by a computer keyboard.... | 12/28/1999 |
| 5974208 | Sliding-frequency guiding filter for soliton transmission The present invention relates to a sliding-frequency guiding filter which is capable of guiding soliton pulses to hundreds of different resonant frequencies by designing the device so that the filter can automatically offset its peak resonant frequency fr... | 10/26/1999 |
| 5946117 | Optical soliton telecommunication system with dispersion-shifted optical fibre An optical telecommunication system has at least two sources of optical modulated signals at different wavelengths in a predetermined transmission wavelength band, together with a multiplexer for the signals, an optical fibre line connected at one end to ... | 08/31/1999 |
| 5914797 | Audio video apparatus controller An audio video apparatus controller connected to a timer provided in a desired audio video apparatus wherein a reserve number indicative of the order of input data and a time are uniquely and correspondingly stored each time the time is input. The audio v... | 06/22/1999 |
| 5903368 | Method and a system for optical communications with passive routing Optical pulses carrying information to be conveyed are routed, for each pulse, by the intensity of the pulse. The pulses may be solitons. The invention is particularly applicable to long distance communications.... | 05/11/1999 |
| 5892608 | Optical receiver device for dark soliton lightwave An optical transmitter which reverses the ON-OFF state of the optical intensity of a bright soliton lightwave and generates a dark soliton lightwave having an optical phase shift, an optical receiver for the dark soliton lightwave, and a superfast, high-c... | 04/06/1999 |
