Bizarre Patents
Reward Candy Dispenser for Personal Computers
A personal computer peripheral, battery powered reward candy dispenser which immediately presents students with a single candy for each problem completed correctly.
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 |
| 8155534 | Optical modulator for higher-order modulation According to one embodiment of the invention, a 16-QAM optical modulator has a Mach-Zehnder modulator (MZM) coupled to a drive circuit that drives the MZM based on two electrical binary signals. The output of the MZM corresponds to an intermediary constellation cons... | 04/10/2012 |
| 8055137 | Phase coded non-return-to-zero optical transmitter Embodiments of the present invention provide a method and apparatus for producing a phase coded non-return-to-zero (PC-NRZ) optical signal. The method includes providing an input optical signal; providing first and second drive signals, the first drive signal having... | 11/08/2011 |
| 8041232 | Optical transmitter and control method thereof An optical transmitter which modulates the phases and intensities of double pulses and then transmits them, includes a branching section which branches each of the input double pulses to first and second paths, a first optical modulator placed in the first path, sec... | 10/18/2011 |
| 8019232 | Method and apparatus for optical phase modulation A method of phase modulating optical radiation by the steps of phase modulating the optical radiation by using a modulator having an extinction ratio in order to provide a multilevel phase shift key signal, and applying to each optical pulse a phase-shift having an ... | 09/13/2011 |
| 7991297 | Chirped laser with passive filter element for differential phase shift keying generation A method for generating D-N-PSK optical signals is disclosed wherein a laser is modulated to generate optical signal pairs including phase modulated and fixed phase portions, the phase modulated portions having a frequency encoding one or more data symbols and the f... | 08/02/2011 |
| 7965947 | Wavelength division multiplexing passive optical network architecture with source-free optical network units An optical system and method includes a source-free optical network unit coupled to an optical fiber for receiving an original carrier signal with downstream data over the optical fiber. The optical network unit includes a modulator configured to remodulate the orig... | 06/21/2011 |
| 7912378 | Modulating a signal using a fractional phase modulator A system operable to modulate a signal according to phase-shift keying (PSK) modulation includes one or more phase modulators that comprise one or more fractional phase modulators. A fractional phase modulator includes a splitter that splits a communication signal t... | 03/22/2011 |
| 7881618 | System and method for m-ary phase-shifting keying modulation System and method for m-ary phase shifting keying modulation. According to an embodiment, the present invention provides a method for performing m-ary phase-keying shift modulation. The method includes providing at least a first signal and a second signal by a signa... | 02/01/2011 |
| 7809280 | 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; and an amplitude modulator, modulated with the logical... | 10/05/2010 |
| 7796897 | WDM optical transmission system and WDM optical transmission method A WDM optical transmission system of the invention: detects an optical waveform of an intensity-modulated optical signal adjacent to a phase-modulated optical signal in a wavelength range; calculates a phase modulation drive waveform for canceling XPM of the phase-m... | 09/14/2010 |
| 7783203 | System and method for controlling a difference in optical phase and an optical signal transmitter An optical phase difference control system is provided for controlling a phase difference of a single optical time-division multiplexed signal obtained by multiplexing a plurality of modulated optical signals encoded. The control system includes an interferometer an... | 08/24/2010 |
| 7734190 | System and method for generating optical return-to-zero signals with differential bi-phase shift A system and method for generating an optical return-to-zero signal. The system includes an electro-optical conversion system. The electro-optical conversion system is configured to receive an input electrical non-return-to-zero signal, process information associate... | 06/08/2010 |
| 7693427 | Modulator, optical transmitter and optical transmission apparatus An object of this invention is to provide a modulator, an optical transmitter and an optical transfer device which can modulate a channel signal while suppressing residual AM signals regardless of the frequency of a channel signal and suppressing deterioration of th... | 04/06/2010 |
| 7634200 | Method and apparatus for transporting ethernet and radio frequency signals in fiber-optic system A single wavelength fiber-optic communication system that mixes an Ethernet signal with a radio frequency signal is disclosed. The system includes an Ethernet signal module, a radio frequency signal module, a mixer module and a receiver module. The Ethernet signal m... | 12/15/2009 |
| 7596325 | Method and apparatus for pulse-amplitude equalization of rational harmonic mode-locked optical signal A method and an apparatus for pulse-amplitude equalization of rational harmonic mode-locked optical pulses provides modulation voltages greater than a switching voltage of a dual-electorde Mach-Zehnder modulator to electrodes of the Mach-Zehnder modulator, so that r... | 09/29/2009 |
| 7558487 | 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. ... | 07/07/2009 |
| 7555224 | Using superimposed ASK label in an all-optical label swapping system and method thereof An all-optical label swapping system and method superimposes a low-speed ASK label on top of a high-speed DC-balanced-line-coded ASK payload. An old ASK label is erased by modulating the combined payload and label signal with the inverse of the received ASK label. T... | 06/30/2009 |
| 7555225 | Optical system comprising an FM source and a spectral reshaping element An optical communication system which has an optical signal source adapted to receive a base binary signal and produce a first signal, said first signal being frequency modulated; and an optical spectrum reshaper adapted to reshape the first signal into a sec... | 06/30/2009 |
| 7555223 | UWB signal generator using optical FSK modulator A UWB signal generator includes: a laser light source for generating laser light, an optical intensity modulator for modulating an intensity of laser light from the laser light source, a signal source of the optical intensity modulator for outputting a signal transm... | 06/30/2009 |
| 7542683 | Chirp Managed Laser (CML) transmitter A fiber optic communication system comprising: an optical signal source adapted to receive a binary base signal having a bit period T, and generate a first signal, wherein the first signal is frequency modulated; and | 06/02/2009 |
| 7515834 | Upgraded optical communication system with increased transmission capacity and method A method for upgrading a wavelength division multiplex (WDM) optical communication system includes replacing an installed transmitter operable to transmit a data stream at a defined bit rate with a return-to-zero M-ary phased shift keying (RZ-mPSK) transmitter opera... | 04/07/2009 |
| 7483640 | Optical multilevel-coded signal transmission system and method thereof, optical transmitter, and multilevel-coded signal light generating method An optical multilevel-coded signal transmission system transmits information from an optical transmitter to an optical receiver through an optical transmission line using optical intensity and optical phase separately. The optical transmitter includes an inverted RZ... | 01/27/2009 |
| 7471903 | Optical communication system An optical communications system has a transmitter which uses modulation using multiple level phase and/or amplitude modulation, and is adaptable to provide modulation for different signals using different selections of the multiple levels. A receiver is able to per... | 12/30/2008 |
| 7450861 | Return-to-zero alternative-mark-inversion optical transmitter and method for generating return-to-zero alternative-mark-inversion optical signal using the same An optical transmitter for generating return-to-zero alternative-mark-inversion (RZ-AMI) optical signals and a method for generating the optical signals are provided. The optical transmitter includes a light source radiating at its output an intensity-modulated ligh... | 11/11/2008 |
| 7433605 | Adiabatic frequency modulated transmitter with negative chirp The invention, in one form, is a fiber optic system having an optical signal source adapted to produce a frequency and amplitude modulated optical digital signal and a semiconductor optical amplifier adapted to receive the frequency and amplitude modulated optical d... | 10/07/2008 |
| 7426349 | Method of signal transmission in a WDM communication system In a representative embodiment, a transmitter of a WDM communication system is equipped with a Mach-Zehnder modulator (MZM) configured to produce an optical signal corresponding to a duobinary data stream by modulating a beam of light passing through the MZM. A thre... | 09/16/2008 |
| 7424228 | High dynamic range radio frequency to optical link A communication system includes an optical transmitter which is differentially driven and an optical receiver that outputs a differential signal. The optical transmitter creates the differential drive signal from an input signal and delivers the differential drive s... | 09/09/2008 |
| 7421209 | Optical wavelength multiplexing FSK modulation method An optical wavelength multiplexing frequency shift keying modulation system. The system includes an optical wavelength multiplexing signal acquisition unit for outputting an optical wavelength multiplexing signal. A n optical frequency shift keying modulation unit a... | 09/02/2008 |
| 7418211 | Control apparatus and control method for optical modulator An object of the invention is to provide a control system in which the phase shift between drive signals of an optical modulator can be reliably detected and compensated by a simple configuration. To this end, a control apparatus of the invention, for an optical mod... | 08/26/2008 |
| 7418209 | System and method for multi-dimensional encoding The invention provides, according to its various embodiments, a method for secure communication that involves encoding and transmitting an optical communications signal that is encoded based on a multi-dimensional encoding technique. The multi-dimensional encoding t... | 08/26/2008 |
| 7409163 | Method and apparatus for optical signal transmission A method and apparatus for transmission of optical signals across an optical transmission link wherein duobinary signals or inverse-data signals are transmitted when the chromatic dispersion of the transmission link is above or below a dispersion threshold, respecti... | 08/05/2008 |
| 7406267 | Method and apparatus for transmitting a signal using thermal chirp management of a directly modulated transmitter A fiber optic transmitter comprising a digital driver adapted to adjust the crossing point of a digital base signal, an optical source adapted to receive the digital base signal and produce a frequency modulated optical signal, and an optical spectrum reshaper adapt... | 07/29/2008 |
| 7398023 | Method and apparatus for bias and alignment control in an optical signal transmitter A method and apparatus for controlling bias and alignment in an optical signal transmitter for providing intensity modulation and DPSK modulation to an optical signal, e.g. in an RZ-DPSK modulation format. Output power in dither signals applied to the bias signals m... | 07/08/2008 |
| 7398022 | Optical return-to-zero phase-shift keying with improved transmitters An apparatus and a method for transmitting at least a digital optical signal with return-to-zero phase-shift keying, employing a single optical modulator with dual-drive design, the encoded optical signal having improved spectral efficiency and performances and bein... | 07/08/2008 |
| 7394992 | Control of an optical modulator for desired biasing of data and pulse modulators In an optical transmitter, continuous wave light from a laser passes through a data modulator (DM) for non-return-to-zero (NRZ) encoding of a data stream and through a pulse modulator to add return-to-zero encoding to the modulated optical signal. A modulator contro... | 07/01/2008 |
| 7389053 | Tunable filtering of RF or microwave signals based on optical filtering in Mach-Zehnder configuration Devices and techniques for achieving signal filtering in RF or microwave frequencies by optical filtering using two separate optical paths. Each optical path may include one or more optical resonators to achieve desired optical filtering. ... | 06/17/2008 |
| 7376352 | Chirp managed laser fiber optic system including an adaptive receiver A fiber optic communication system comprising: an optical signal source adapted to produce a frequency modulated signal; and an optical spectrum reshaper (OSR) adapted to convert the frequency modulated signal into... | 05/20/2008 |
| 7376358 | Location specific optical monitoring An optical spike is generated at an arbitrarily selected location within an arbitrary optical link. The optical spike is generated by deriving a spike signal having a plurality of components, and launching the spike signal into the a transmitter end of the optical l... | 05/20/2008 |
| 7372891 | Signal generator and decoder A signal generator and decoder are used for a single sideband spread spectrum signal. A single sideband spread spectrum signal generator and decoder in which single sideband modulation using a complex spreading code is achieved with improved correlation properties, ... | 05/13/2008 |
| 7369780 | Remodulating channel selectors for WDM optical communication systems The present invention provides a remodulating channel selector for a wavelength division multiplexed optical communication system. The remodulating selector receives a WDM input signal, selects a particular optical channel from the WDM signal and places the informat... | 05/06/2008 |
