Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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 |
| 8270844 | Low jitter RF distribution system A timing signal distribution system includes an optical frequency stabilized laser signal amplitude modulated at an rf frequency. A transmitter box transmits a first portion of the laser signal and receive a modified optical signal, and outputs a second portion of t... | 09/18/2012 |
| 8170422 | Frequency shift keying demodulator It is an object of the present invention to provide an FSK demodulator which can be used in the optical information and telecommunications and the like, and which can appropriately demodulate an FSK signal by compensating a delay of an optical FSK modulated signal d... | 05/01/2012 |
| 8103170 | Method for optical time division multiplex and apparatus thereof The present invention inputs a signal synthesized an optical pulse with a variable-wavelength laser beam different in wavelength from it to a delay unit (S1). The delay unit branches the signal to two optical signals, produces an optical path difference betwe... | 01/24/2012 |
| 8095017 | Fully optical device for breaking down the dynamic range of an optical signal and system for measuring the signal using the device Fully optical device for breaking down the dynamic range of an optical signal and system for measuring the signal, using this device. This device comprises fully optical means to break down this dynamic range. ... | 01/10/2012 |
| 7792431 | Detection of an electromagnetic signal A signal detector system (10) comprises a single signal detector (11) having a limited on-time during which any received electromagnetic signal can be assessed. The signal detector (11) receives electromagnetic signals from a single direction in... | 09/07/2010 |
| 7751721 | Optical DQPSK receiver apparatus A first interferometer comprises a first delay element and a first phase shift element, and a second interferometer comprises a second delay element and a second phase shift element. The amounts of phase shift in the first and second phase shift element are zero and... | 07/06/2010 |
| 7627253 | RF-photonic transversal filter method and apparatus A method and apparatus for implementing an RF photonic transversal filter that utilizes tap apodization and wavelength reuse to obtain a high side lobe suppression together with narrow and configurable passbands. Several taps are obtained from one wavelength by usin... | 12/01/2009 |
| 7609974 | Data transmission method and a system thereof An optical transmitter generates a transmission signal having a frame as a unit, the frame including a signal pilot signal with fixed amplitude and phase and two data bits to output the generated signal into a transmission line. In a receiver, a splitter splits the ... | 10/27/2009 |
| 7539422 | Quantum optical transmission device In an optical detection method that requires a reference light such as homodyne detection, a signal light and the reference light must be equal to each other in the wavelength, and the phase relation between them must be maintained constant. In order to satisfy this... | 05/26/2009 |
| 7515832 | Optical transmission equipment and integrated circuit Optical transmission equipment, capable of electrically adjusting the delay difference between a plurality of digital signal paths to be connected to a multilevel optical modulation unit or demodulation unit, having multiplexing circuits connected to the digital sig... | 04/07/2009 |
| 7489874 | Method and apparatus for demodulation of optical differential phase shift keyed signals Method and apparatus for demodulating one or more channels of an optical differential phase shift keyed (DPSK) signal with a symbol rate of SR using an athermal optical delay interferometer with a free spectral range (FSR) of 50 GHz/2N, and (0.8×SR) | 02/10/2009 |
| 7457548 | Quantum optical transmission device and quantum optical generator device therefor A squeezed light generator comprises an arbitrary optical fiber, a means for temporally separating two linearly polarized components, two Faraday rotators and a high-reflection mirror. Pulse lights that are temporally separated into two orthogonally polarized compon... | 11/25/2008 |
| 7444085 | DQPSK optical receiver circuit A DQPSK optical signal is split by the splitter 1 into Data 1 and Data 2 systems. For each system, a phase-modulated optical signal is converted into an intensity modulated electric signal, and clock reproduction and data reproduction are indepe... | 10/28/2008 |
| 7437083 | Wavelength converter A wavelength converter for binary optical signals includes an interferometer structure (110) for generating an output signal by modulating a received local signal (LS) according to the modulation of a fUrther received first input signal (IS 1). When su... | 10/14/2008 |
| 7437082 | Private optical communications systems, devices, and methods A method for transmitting traffic in an optical communication system comprising separating the input traffic into a plurality of data signals, parameter encoding the data signals, transmitting each of the data signals on a separate optical channel, receiving the dat... | 10/14/2008 |
| 7424226 | Optical code division multiplexing communication method and system An optical code division multiplexing communication method includes the steps of: producing a multi-wavelength optical pulse train from wavelength multiplexing pulse; transmitting the multi-wavelength optical pulse train through a transmission line using a time-spre... | 09/09/2008 |
| 7411725 | Optical signal demodulator A demodulator includes: a Michelson interferometer having: a half-mirror which splits an optical signal, emits a first split light to a first optical path, and emits a second split light to a second optical path; a first reflector which reflects the first split ligh... | 08/12/2008 |
| 7403717 | Method and apparatus for first-order polarization mode dispersion compensation Method and apparatus for compensating for first-order Polarization Mode Dispersion in an optical transmission system. An apparatus has a polarization controller for transforming polarization components of an optical signal carried by the optical fiber into orthogona... | 07/22/2008 |
| 7376353 | Method and apparatus for dispersion management in optical mesh networks A method and apparatus for dispersion management in hybrid data rate long haul mesh networks are provided. The apparatus comprises a dispersion compensator for fully compensating the residual dispersion of a fiber link in the mesh network. A de-interleaver is couple... | 05/20/2008 |
| 7373088 | Agile spread waveform generator An agile spread spectrum waveform generator comprises a photonic oscillator and an optical heterodyne synthesizer. The photonic oscillator comprises a multi-tone optical comb generator for generating a series of RF comb lines on an optical carrier. The optical heter... | 05/13/2008 |
| 7373091 | Multicasting optical switch fabric and method of detection based on novel heterodyne receiver The inventors propose herein a switch fabric architecture that allows broadcasting and fast channel access in the ns-range. In various embodiments of the present invention, 10 Gb/s receiver modules are based on a novel heterodyne receiver and detection technique, wh... | 05/13/2008 |
| 7359396 | Optical-core network with selective signal queueing A core network shared by a large number of edge nodes comprises core nodes interconnected by core channels. Selected core channels are provided with buffers to enable temporal alignment of signals arriving at any core node from several other core nodes. A buffer may... | 04/15/2008 |
| 7352971 | Broadband control of polarization mode dispersion A method and system is provided for compensating polarization mode dispersion (PMD) in an optical communications system includes a controller designed to control a broadband PMD compensator to differentially delay light at each one of a plurality of selected wavelen... | 04/01/2008 |
| 7343101 | Method and system for reducing crosstalk in an optical communication network A method of reducing correlation between channels in an optical communication network. A transmission characteristic of first data on a first channel is altered to reduce correlation between the first data and second data on a second channel. The reduction in correl... | 03/11/2008 |
| 7340133 | Configurable dispersion compensation trimmer The invention pertains to optical fiber transmission systems, and is particularly relevant to transmission of large volumes of data over long distances at high rates. An improved apparatus achieving precise dispersion compensation in a fiber span is disclosed. In pa... | 03/04/2008 |
| 7333729 | Optical transmitter, optical receiver and optical transmission system using same To resolve problems, with the invention, an optical transmitter comprises an encoder for generating an optical signal obtained by encoding multi-wavelength pulses corresponding to sending data by use of a method of time spread/wavelength hopping in accordance with a... | 02/19/2008 |
| 7333733 | Optoelectronic clock generator producing high frequency optoelectronic pulse trains with variable frequency and variable duty cycle and low jitter An optoelectronic pulse generator is provided that includes a thyristor detector/emitter device having an input port and an output port. The thyristor detector/emitter device is adapted to detect an input optical pulse supplied to the input port and to produce an ou... | 02/19/2008 |
| 7326948 | Beam modifying device, lithographic projection apparatus, method of treating a beam, and device manufacturing method A beam modifying device configured to receive an input radiation beam along a first optical axis, and configured to emit an output radiation beam along a second optical axis. The beam modifying device includes a divider disposed along the first optical axis and conf... | 02/05/2008 |
| 7324457 | Method and apparatus for compensating for optical transmission delay in a synchronous mobile communication system using synchronous digital hierarchy A method and apparatus are disclosed for compensating for optical transmission delays in a synchronous mobile communication system. A Base Station Transceiver Subsystem (BTS) includes a Main Unit (MU) for processing a mobile communication signal and a plurality of R... | 01/29/2008 |
| 7324758 | Optical dispersion monitoring apparatus and optical dispersion monitoring method, and optical transmission system using same An optical dispersion monitoring apparatus and an optical dispersion monitoring method are capable of monitoring dispersion accurately with a simple construction in an optical transmission system using the same. To this end, the optical dispersion monitoring apparat... | 01/29/2008 |
| 7321731 | Optical pulse position modulation discriminator Systems and methods are disclosed herein to provide various optical techniques. For example, in accordance with an embodiment of the present invention, a pulse position modulation discriminator architecture is disclosed for discriminating temporal positions of PPM-e... | 01/22/2008 |
| 7319822 | System and method of space-time equalization to mitigate effects of fading and scintillation for wireless communication A system and method is disclosed for mitigating the scintillation and fading effects of baseband wireless, radio frequency wireless, optical wireless and satellite communication links. The system uses a space-time channel model to derive an optimal processing archit... | 01/15/2008 |
| 7315699 | Optical device for extracting a sideband signal from a composite signal including orthogonally modulated signals An optical device extracts an information bearing sideband such as an FSK or SCM signal (label) from a composite signal that includes the sideband and an orthogonally modulated signal such as an intensity modulated signal (payload) by splicing the composite signal i... | 01/01/2008 |
| 7302185 | Device and method for millimeter wave detection and block conversion The device includes a first fiber optic transmitter (FOT) to receive a millimeter wave (MMW) signal and to generate a multiple sideband optical signal, and a second FOT to generate a second optical signal, from a reference signal. A first wavelength division multipl... | 11/27/2007 |
| 7295784 | Apparatus and method for performing electrically band-limited optical differential phase shift keying modulation The present invention relates to an apparatus and method for performing optical Differential Phase Shift Keying (DPSK) modulation, which transmits a phase difference between adjacent bits as information. The electrically band-limited optical DPSK modulating apparatu... | 11/13/2007 |
| 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 |
| 7286767 | Optical transceiver over single communication link A method, apparatus, and system for optical communications. An optical transmit signal is generated in response to an electrical transmit signal. The optical transmit signal is coupled into a single communication link for transmission there over. An optical receive ... | 10/23/2007 |
| 7284916 | Dual stage modular optical devices with insert digital diagnostics component Embodiments of the present invention are directed to dual stage modular optical devices with insert digital diagnostics components. A first portion of a leadframe couples a first fabricated package including a light source and/or light detector to a second fabricate... | 10/23/2007 |
| 7272324 | Equalization of optical signals Methods for performing time-domain equalization of an information signal represented by an optical signal are provided. A representative method includes: receiving the optical signal; optically splitting the optical signal into beams; optically delaying at least one... | 09/18/2007 |
| 7260279 | Integrated opto-electronic oscillators Integrated opto-electronic oscillators that use micro resonators in the optical section of the opto-electronic feedback loop. ... | 08/21/2007 |
