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| Number | Title | Issue Date |
| 8170423 | Data transmission optical device comprising a source emitting a laser beam The present invention relates to a data transmission optical device including a source emitting a laser beam for transmitting the data toward an optical sensor. The device has means for collimating the beam. It may be implemented on board an aircraft for transmittin... | 05/01/2012 |
| 8170424 | Method and apparatus for optical signal power discrimination The present invention provides an optical power level discriminating device and method for discriminating optical power levels. The optical discriminating device includes a splitter for receiving an optical signal having first and second signal states, and splitting... | 05/01/2012 |
| 8086112 | Optical signal processing circuit An optical gate switch circuit includes: an asymmetric Mach-Zehnder interferometer having an optical path that outputs control light and probe light to a second optical directional coupler via a first optical directional coupler and an optical phase modulation eleme... | 12/27/2011 |
| 8073342 | Method and apparatus for transmitting optical signals The present invention addresses the problem of transmitting optical signals with high extinction ratios using low-power drive signals. At present, low-power optical transmitters typically operate with modulation extinction ratios of, at best, about 10 dB. Embodiment... | 12/06/2011 |
| 7983572 | Electro-absorption modulator integrated with a vertical cavity surface emitting laser An electro-absorption modulator integrated with a vertical cavity surface emitting laser (VCSEL). An electro-absorption modulator (EAM) is integrated or grown on a VCSEL. The electro-absorption modulator may be separated from the VCSEL by a semi-insulating or noncon... | 07/19/2011 |
| 7925172 | High power, low distortion directly modulated laser transmitter An optical transmitter is disclosed wherein a directly modulated laser outputs a frequency modulated signal through a semiconductor optical amplifier. Both the optical transmitter and semiconductor amplifier are modulated according to an output of a digital data sou... | 04/12/2011 |
| 7917041 | Variable optical attenuator integration into transmitter optical subassemblies A small-scale VOA system includes a polarization rotator, a voltage multiplier circuit, and at least one transistor. The polarization rotator can be positioned within a TOSA along the emission axis of a corresponding optical signal source in addition to one or more ... | 03/29/2011 |
| 7894725 | Time-multiplexed optical waveform generation A time-multiplexed waveform generator includes a wavelength splitter that receives an input optical signal and spectrally separates the input optical signal into a plurality of frequency components. A plurality of intensity modulators receives each of the frequency ... | 02/22/2011 |
| 7877021 | Electrically programmable pulse generator, in particular a pulse generator of very high resolution phase and intensity profiles In a pulse generator of very high resolution phase and/or intensity profiles, an active mode-locking laser source (1) emits a first train of optical pulses according to a determined period (To), which is intensity-modulated pulse-by-pulse by a modulator (2... | 01/25/2011 |
| 7860403 | Data format for high bit rate WDM transmission The invention includes a method for optically encoding data for transmission over a wavelength division multiplexed optical communications system comprising the steps of: generating a periodic series of optical pulses defining a series of time slots, wherein one pul... | 12/28/2010 |
| 7860404 | Optical FM source based on intra-cavity phase and amplitude modulation in lasers An optical transmitter is discloses having a gain section and a phase section. The phase section is modulated to generate a frequency modulated signal encoding data. The frequency modulated signal is transmitted through an optical spectrum reshaper operable to conve... | 12/28/2010 |
| 7844188 | Light collecting device and single-photon generation device A light collecting device is disclosed that is able to couple light from a light emission structure to an optical fiber at low loss. The light collecting device includes an excitation light source for emitting excitation light to an optical fiber; a light condensing... | 11/30/2010 |
| 7826751 | Bi-directional signal interface A bi-directional signal interface includes a first waveguide that propagates a first traveling wave. The first waveguide has one end that is coupled to a RF input port that receives a RF transmission signal and another end that is coupled to a RF bi-directional port... | 11/02/2010 |
| 7801451 | Optical signal processing circuit An optical phase modulation circuit includes an optical phase modulation element, an optical bandpass filter, and an optical directional coupler, wherein control light with a wavelength of λC is coupled with probe light with a wavelength of λP | 09/21/2010 |
| 7787779 | Photonic time-domain electromagnetic signal generator and system using the same A photonic waveform generator and system is described. The photonic waveform generator is used in produce an electrical pulse having arbitrarily controllable temporal characteristics in a Fourier transform (FT) pulse shaper or a direct space-to-time (DST) photonic g... | 08/31/2010 |
| 7756424 | Optical CDMA communications system using OTDL device An optical code division multiple access communication system using a processor processes at least one collimated input beam which has been modulated with a data signal to produce multiple time-delayed output beams. The multiple time-delayed output beams are spatial... | 07/13/2010 |
| 7738797 | Optical module socket An optical module socket includes a base on which an optical module is mounted; descend/ascend means which is ascendably and descendably provided in the base and on which the optical module is mounted; holding means for holding the optical module in a predetermined ... | 06/15/2010 |
| 7697848 | Wireless communication system, wireless transmitting apparatus, and wireless receiving apparatus A wireless communication system, a wireless transmitting apparatus, and a wireless receiving apparatus which can be applied to all types of light sources and can be applied to a variety of fields, provided with a medium forming an information transmission source, a ... | 04/13/2010 |
| 7646991 | Selectable frequency EMR emitter An optical transmitter produces electromagnetic radiation (e.g., light) of at least one frequency (e.g., at a particular color frequency) by utilizing a resonant structure that is excited by the presence a beam of charged particles (e.g., a beam of electrons) where ... | 01/12/2010 |
| 7616902 | Power source for a dispersion compensation fiber optic system This invention generally relates to an optical filter for a fiber optic communication system. An optical filter may be used, following a directly modulated laser source, and converts a partially frequency modulated signal into a substantially amplitude modulated sig... | 11/10/2009 |
| 7613401 | Optical FM source based on intra-cavity phase and amplitude modulation in lasers 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 | 11/03/2009 |
| 7609977 | Optical transmission using semiconductor optical amplifier (SOA) A fiber optic communication system is disclosed having an optical signal source adapted to produce an amplitude and frequency modulated signal encoding binary data wherein high intensity 1 bits are red shifted relative to lower intensity 0 bits. The amplitude and fr... | 10/27/2009 |
| 7565084 | Robustly stabilizing laser systems A robustly stabilized communication laser can output a multimode optical signal remaining aligned to a coordinate of a dense wavelength division multiplexing (“DWDM”) grid while responding to a fluctuating condition or random event, such as, without limitation, ... | 07/21/2009 |
| 7561811 | Method, device, and system for regeneration and application of optical clock An optical device for regenerating an optical clock, including an optical path provided between an input port to which signal light modulated at a frequency fs is supplied and an output port, and an optical loop optically coupled to the optical path. The ... | 07/14/2009 |
| 7558488 | 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 spect... | 07/07/2009 |
| 7536113 | Chirp managed directly modulated laser with bandwidth limiting optical spectrum reshaper A fiber optic communication system, comprising: an optical signal source adapted to produce a frequency modulated signal; and an optical spectrum reshaper adapted to receive the frequency modulated signal and outpu... | 05/19/2009 |
| 7509057 | IrDA transceiver module that also functions as remote control IR transmitter The infrared LED of an IrDA module transmits IR energy with a peak wavelength (for example, 875 nm) appropriate for IrDA communication. This peak wavelength is lower than is the wavelength (for example, 940 nm) used in ordinary IR remote controls (RC). The IrDA LED ... | 03/24/2009 |
| 7480464 | Widely tunable, dispersion tolerant transmitter An optical transmitter comprising: (i) an electrical switch; (ii) a laser array comprising a plurality of tunable laser elements; and (iii) an Optical Spectrum Reshaper (OSR) used to reshape the ou... | 01/20/2009 |
| 7477851 | Power source for a dispersion compensation fiber optic system This invention generally relates to an optical filter for a fiber optic communication system. An optical filter may be used, following a directly modulated laser source, and converts a partially frequency modulated signal into a substantially amplitude modulated sig... | 01/13/2009 |
| 7474859 | Versatile compact transmitter for generation of advanced modulation formats A system for generating a return-to-zero differentially-phase-shift-keyed (RZ-DPSK) optical signal comprising: a driver comprising an N-level digital multilevel transformer (DMT) configured to receive a two level digital electrical... | 01/06/2009 |
| 7444081 | 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... | 10/28/2008 |
| 7439533 | Optical module and optical communication device An optical module includes a light emitting element, a connector part that supports one end of an optical fiber and optically couples the optical fiber to the light emitting element, and a monitoring light receiving element that has a characteristic to increase phot... | 10/21/2008 |
| 7437074 | Wavelength division multiplexing transmission system A WDM transmission system is provided which can multiplex/demultiplex and transmit wavelength division multiplexing signals, where signal lights have a different signal bandwidth, in a status without much deterioration of transmission quality. In the WDM transmissio... | 10/14/2008 |
| 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 |
| 7409161 | Free space optics communication apparatus and free space optics communication system A free space optics communication apparatus which can perform stable communication is disclosed. The free space optics communication apparatus has a plurality of light-emitting units each emitting a light beam which forms a generally elliptical irradiation pattern. ... | 08/05/2008 |
| 7406266 | Flat-topped chirp induced by optical filter edge A fiber optic communication system comprising: an optical signal source adapted to produce a binary amplitude modulated signal; and an optical spectrum reshaper adapted to receive the amplitude modulated signal and... | 07/29/2008 |
| 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 |
| 7403713 | Quantum source coding apparatus and quantum information communication system Quantum source coding apparatus for communication of quantum information comprising: a quantum state preparation device for converting input messages into block messages; a coding device for producing coded signals by compressing the block messages prepared by the q... | 07/22/2008 |
| 7403719 | Feedback control for free-space optical systems Disclosed is a system and method for aligning a free-space optical signal in an optical system having a light modulator having an array of pixels. In this system and method, certain pixels of the light modulator array are initially assigned for the modulation of the... | 07/22/2008 |
