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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 8112005 | Optical receiver scheme with all-optical decision element A receiver scheme for optical signals in Return-to-zero (RZ) systems comprises a conventional receiver at the input of which is placed an all-optical decision element realized with nonlinear optical elements. This allows obtaining a substantial increase in performan... | 02/07/2012 |
| 8103178 | Linearized phase modulated analog optical links A phase-modulated analog optical link that uses parallel interferometric demodulation to mitigate the dominant intermodulation distortion present in the link. A receiver for demodulating phase modulated optical signals includes a splitter dividing the phase modulate... | 01/24/2012 |
| 7596326 | Distortion cancellation circuitry for optical receivers An optical receiver having a photodetector coupled to an external optical fiber for receiving an optical communications signal and converting it into an electrical signal; an RF amplifier coupled to the electrical output of the photodetector and generating an output... | 09/29/2009 |
| 7421212 | Detecting and locating pulses using a Bragg cell Detecting a pulse of a signal includes receiving the signal and a light beam. The signal drives a spatial light modulator to modulate the light beam, where the complex amplitude of the modulated light beam is proportional to the signal current. The modulated light b... | 09/02/2008 |
| 7418212 | Electrical detection of optical symbols A system and method for detecting digital symbols carried in a received optical signal. The system comprises a functional element operative to receive a stream of samples of an electrical signal derived from the received optical signal and to evaluate a non-linear f... | 08/26/2008 |
| 7411726 | Multi-channel differentially encoded phase shift keyed receivers An optical, multi-channel, Differential Phase Shift Keying (DPSK) receiver demodulates multiple Wavelength Division Multiplexed (WDM) channels using at least one interferometer. This distributes expense of the interferometer(s) over all channels of an optical signal... | 08/12/2008 |
| 7376359 | Digital regulated light receive module and regulation method The invention discloses a digital adjusting method for an optical receiver module, and the method implements real-time monitor of parameters, on-line adjustment and non-linear compensation. The digital optical receiver module includes elements as follow: a voltage o... | 05/20/2008 |
| 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 |
| 7343098 | Fiber optic phased array and associated method for accommodating atmospheric perturbations with phase and amplitude control A fiber optic phased array and control method are provided for controllably adjusting the phase and amplitude of the optical signals emitted by a plurality of fiber optic amplifiers to compensate for atmospheric turbulence. The fiber optic phased array also includes... | 03/11/2008 |
| 7233430 | Multi-channel DPSK receiver An optical, multi-channel, Differential Phase Shift Keying (DPSK) receiver demodulates multiple Wavelength Division Multiplexed (WDM) channels using a single interferometer. This distributes expense of the interferometer over all channels of an optical signal, allow... | 06/19/2007 |
| 7106979 | Polarization mode dispersion compensating apparatus, system, and method Residual birefringence in optical fibers causes polarization mode dispersion (PMD). The invention compensates for this by using a polarization mode dispersion compensator and a polarimeter. The PMD compensator has a variable PMD that may be controlled. The output of... | 09/12/2006 |
| 7031612 | Optical transponders and transceivers An optical transponder/transceiver for intermediate range (e.g., 10-50 km) optical communication applications utilizes an electroabsorption modulated laser for the transmitting device. Preferably, the laser operations at a wavelength of approximately 1310 nm and com... | 04/18/2006 |
| 6525857 | Method and apparatus for interleaved optical single sideband modulation A method and device for bandwidth efficient multi-channel optical single sideband modulation with suppressed carrier and a corresponding method and apparatus for demodulation are disclosed. The modulator includes a bandwidth efficient coder/modulator, a M... | 02/25/2003 |
| 6366380 | Optical transceiver EMI detuning device A transceiver for the transmission and reception of high speed optical signals contains a detuning structure which reduces the gain for quarter wave radiation of Electro Magnetic Radiation (EMI). A conductive housing couples light energy from a source or ... | 04/02/2002 |
| 5424680 | Predistorter for high frequency optical communications devices A generalized frequency dependent predistortion circuit for nonlinear optic devices such as semiconductor lasers and light emitting diodes includes a pre-filter and post-filter associated with a linearizer (distorter). A multi-channel sub-carrier electric... | 06/13/1995 |
