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"That the automobile has practically reached the limit of its development is suggested by the fact that during the past year no improvements of a radical nature have been introduced."
Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 8135276 | Quantum repeater A quantum repeater includes a transmitter portion including a source, a set of matter systems, and an optical system. The source produces a probe pulse in a probe state having components with different photon numbers, and each matter system has at least one state th... | 03/13/2012 |
| 7978974 | Insertable EMI shield clip for use in optical transceiver modules The embodiments disclosed herein relate an insertable shield clip for use in controlling electromagnetic interference in an optical transceiver module. The optical transceiver module may include a shell that houses first and second optical subassemblies and an enclo... | 07/12/2011 |
| 7925159 | Non-directional laser-based self-protection A missile or other weapons countermeasure system includes a non-directional, modulated laser energy signal designed to protect an object (such as an aircraft, land vehicle, building, or vessel). Once a potential threat has been detected, a laser energy source genera... | 04/12/2011 |
| 7583894 | Interferometric operation of electroabsorption modulators Methods and apparatus are described for modulating an optical signal using electroabsorption in conjunction with an optical interferometer. Phase-shift keying modulation can be achieved with lower amplitude modulator drive signals than conventional methods by splitt... | 09/01/2009 |
| 7414568 | Low irradiance sensor with iterative angular resolution A laser warning receiver (LWR) to detect a very low power laser beam for a laser beam rider and provide a high angular resolution in determining the angle-of-arrival of that beam. An aperture having a fixed field-of-view (FOV) is located in a detection channel follo... | 08/19/2008 |
| 7400831 | Method of detecting the presence of cross-talk and apparatus therefor A control loop detects the presence of cross-talk between first, second and third adjacent amplitude modulated wavelength division modulated channels of an optical communications system. A receiver including a demultiplexer, such as an Arrayed Waveguide Grating (AWG... | 07/15/2008 |
| 7378626 | Directed infrared countermeasures (DIRCM) system and method An agile, high-power, reliable DIRCM system that is easily extended to address sophisticated UV or UV-visible capable multi-band threats includes a missile warner having missile warning receivers (MWRs), one or two-color suitably in the mid-IR range, that detect lik... | 05/27/2008 |
| 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 |
| 7349635 | Method and apparatus for routing messages in hybridized optical/wireless networks Method and apparatus for routing messages in a network includes first filters to provide frequency-based message signals converted from an optically-based signal and mixers adapted to mix the frequency-based message signals with sub-carriers to generate frequency-ba... | 03/25/2008 |
| 7330653 | Quantum dense coding system A Quantum Dense Coding System. The system includes a source, a transmitter and a receiver. The source is capable of down-converting a pump photon into a signal photon and an idler photon and outputting probability amplitudes, the signal photon and the idler photon, ... | 02/12/2008 |
| 7266271 | System, probe and methods for colorimetric testing A system and methods for performing calorimetric testing which includes a micro resonator that supports a plurality of whispering gallery mode resonant frequencies, a first waveguide that receives light and evanescently couples whispering gallery mode resonant frequ... | 09/04/2007 |
| 7256930 | High power pulse shaping fiber laser for high data rate free space telecommunication systems An amplified laser source for amplifying a laser projection that includes a diode laser source modulated by a pulse generator applying an alternate high and low voltages higher and lower than a threshold voltage for projecting a modulated optical signal. The laser s... | 08/14/2007 |
| 7218800 | Compensator for polarization-mode dispersion compensation A compensator for compensating polarisation-mode dispersion, comprises a splitter (30) arranged to split light, according to the light's polarisation, between a first optical path and a second optical path; a combiner (40) arranged to combine light fro... | 05/15/2007 |
| 7196744 | Optical transceiver package with a liquid crystal variable optical attenuator A liquid crystal optical attenuator is provided that is used to control the intensity of a light signal. The optical attenuator includes at least one polarizing element having an optical polarization axis, wherein the polarizing element transmits a portion of a ligh... | 03/27/2007 |
| 7173749 | Opto-electronic feedback for stabilizing oscillators This application describes use of an opto-electronic feedback in oscillators to suppress phase noise based on the high Q factor of the opto-electronic feedback. ... | 02/06/2007 |
| 7158295 | Apparatus and method for determining directional transport processes An apparatus for determining directional transport processes with a scanning microscope (100) is disclosed. A deflection means (5) for coupling in an illuminating light beam (3), and a scanning module (7) for graphical display of a specim... | 01/02/2007 |
| 7133612 | Bidirectional WDM transmission system having transmission format for reducing adverse effects of filter concatonation A WDM optical transmission system is provided that operates at a plurality of channel wavelengths. The system includes at least three nodes at which any one or more of the channel wavelengths can be added or dropped. At least three optical transmission links interco... | 11/07/2006 |
| 7092591 | Tunable optical filters having electro-optic whispering-gallery-mode resonators Tunable optical filters using whispering-gallery-mode (WGM) optical resonators-are described. The WGM optical resonator in a filter exhibits an electro-optical effect and hence is tunable by applying a control electrical signal. ... | 08/15/2006 |
| 7085499 | Agile RF-lightwave waveform synthesis and an optical multi-tone amplitude modulator A waveform synthesizer comprising for synthesizing RF lightwave waveforms in the optical domain. These waveforms are constructed by generating their constituent Fourier frequency components or tones and then adjusting the amplitudes of those frequency components or ... | 08/01/2006 |
| 7058316 | Adaptive detector arrays for optical communications receivers An optical communications receiver comprising a wide-band optical detector array and a high-speed digital signal processor programmed to operate on the raw data from the detector array to ameliorate the effects of atmospheric turbulence on the performance of the opt... | 06/06/2006 |
| 7027675 | Frequency tuning of photonic oscillator using amplifier bias voltage In one implementation of the present invention, a method is provided for frequency tuning of a photonic oscillator. The method includes supplying an optical signal, for example laser light, which is modulated, delayed, and then converted to an electrical signal. The... | 04/11/2006 |
| 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 |
| 7016606 | Error mitigation system using line coding for optical WDM communications An apparatus and method of line coding to mitigate collision induced errors in Wavelength Division Multiplexing (WDM) optical communications systems is disclosed. The apparatus and method prevents Soliton-Soliton-Collision induced errors by reducing a variance in a ... | 03/21/2006 |
| 6979810 | Optical modules and methods of making the optical modules A sample & hold type phase detector is used in a CDR IC and, in jitter transfer bandwidth adjustment, VCO output waveforms 90° out of phase with each other can be inputted to the phase detector, whereby a jitter transfer bandwidth can be calculated by only the meas... | 12/27/2005 |
| 6975136 | Isolated channel in an integrated circuit A semiconductor package contains at least one electrically isolated channel. The isolated channel is minimally susceptible to crosstalk from other channels in the package. Specifically, the level of crosstalk that may impinge on the isolated channel is below an acce... | 12/13/2005 |
| 6898379 | System and method for reducing interference in an optical data stream An interference-reducing optoelectronic device determines the value of a current data bit in an optical data stream. A receiver receives the optical data stream, which is converted to a series of samples by a D/A converter. A set of adaptive filters, each filter cor... | 05/24/2005 |
| 6834146 | Differential phase shift keyed demodulator system A differential phase shift keyed demodulator system uses a Michelson interferometer configuration in which polarization maintenance is accomplished by using a single 50:50 coupler coupled to a first Faraday rotator mirror and a second Faraday rotator mirror through ... | 12/21/2004 |
| 6721078 | Switchable interleaved channel separator devices and systems The present invention provides an improved switchable interleaved channel separator device. The switchable interleaved channel separator device utilizes an adjustable reflective non-linear interferometer, which performs both switching and wavelength polarization sor... | 04/13/2004 |
| 6677046 | Glass ceramic A glass ceramic having properties of low thermal expansion, high transmittance in a visible light region and low specific gravity, and a glass ceramic substrate made of the glass ceramic are provided. The glass ceramic has a crystal phase containing a &#x... | 01/13/2004 |
| 6658210 | Interleaved bidirectional WDM channel plan A bidirectional optical link has a plurality of wavelengths to carry information in first and second differing transmission directions to optimize system performance. First and second sets of wavelengths of the plurality of wavelengths are determined wher... | 12/02/2003 |
| 6580532 | Opto-electronic techniques for reducing phase noise in a carrier signal by carrier supression Systems and techniques for suppressing the carrier signal using an optical delay element and an electrical interferometer in an opto-electronic noise suppression module.... | 06/17/2003 |
| 6563620 | Quasi-dispersionless optical fiber transmission, dispersion compensation and optical clock A method of transmitting optical pulses in a transmission media includes separating a coherent source optical pulse into a plurality of mutually coherent pulses, and producing a series of mutually coherent optical pulses from the plurality of pulses. The ... | 05/13/2003 |
| 6538780 | Apparatus and method for reducing the number of control elements for crosstalk reduction devices in an optical switching network An apparatus and method for reducing the number of control elements for crosstalk reduction devices in an optical switching network is disclosed. Crosstalk reduction devices are partitioned into two mutually exclusive groups based on a binary address of t... | 03/25/2003 |
| 6420720 | Countermeasure method A method of countermeasuring heat seeking missiles is disclosed in which an infrared source is spatially modulated by providing a beam from the source which is swept past a point in space to produce pulsed infrared energy at this point. In one embodiment ... | 07/16/2002 |
| 6420718 | Modulated infrared source A modulated infrared source is disclosed in which spatial modulation is accomplished by the rotation of beam forming optics about an infrared source in which a portion of the energy in the beam produced includes energy coming directly from the IR source w... | 07/16/2002 |
| 6420719 | Modulated infrared source A modulated infrared source is disclosed in which spatial modulation is accomplished by the sweeping of an infrared beam past a point in space. In one embodiment close to 100% of the energy from the infrared source is focused by rotating optics including ... | 07/16/2002 |
| 6407400 | High efficiency modulator Apparatus for efficiently modulating the output from an infrared radiation source is provided by a collector/collimator for collecting and collimating the output of the radiation source and a modulator including a stator and at least one rotor. The stator... | 06/18/2002 |
| 6091523 | Multi-channel receiver A multi-channel receiver which exploites the parallel processing advantages of an optical signal processor is used to facilitate 100 percent intercept of an incomming RF signal in a dense RF environment. The receiver performs real time parallel signal pro... | 07/18/2000 |
| 5953140 | Electrical domain improvement of optically filtered signals An efficient and inexpensive system and method for reducing crosstalk between adjacent channels in a high density WDM transmission. The technique provided herein cancels out the effects of crosstalk by processing signals in the electrical domain after the... | 09/14/1999 |
| 5703562 | Method for transferring data from an unsecured computer to a secured computer A method is described for transferring data from an unsecured computer to a secured computer. The method includes transmitting the data and then receiving the data. Next, the data is retransmitted and rereceived. Then, it is determined if errors were intr... | 12/30/1997 |
