Matches 1 - 50 out of 546 1 2 3 4 5 6 7 8 9 10 11 >
Match Document Document Title
7403670 Compact optical modulator  
A novel design for an optical differential quadrature phase shift keying (DQPSK) modulator comprises two intensity modulators in a three-arm interferometer.
7403326 Doped fiber scene projection system and method  
This invention pertains to a scene projection system and a method for projecting a scene that can simulate light temperature of above 2000 K. The system comprises of a light source part for...
7400788 Linearized optical modulator having a plurality of coupling functions  
Invention discloses an apparatus that provides linear optical modulation of light carrier signals by an electrical modulation signal. Linearized modulation is achieved through the selection of a...
7394951 Optical signal level control apparatus  
In an optical signal level control apparatus used in a WDM system, the amount of circuitry per wavelength is reduced. Optical power level is detected on the output side of a variable optical...
7394950 Optical modulator  
An optical modulator of the Mach-Zehnder type including electrodes disposed above a substrate having a pair of linear portions of an optical waveguide includes a signal electrode to which...
7386195 Super-resolution optical components and left-handed materials thereof  
Super-resolution optical components and left-handed materials thereof are provided. A left-handed material includes a substrate, a plurality of deformed split ring resonators (DSRR), and a...
7380993 Optical transceiver for 100 gigabit/second transmission  
An optical transmitter for converting and coupling an information-containing electrical signal with an optical fiber having an electrical input for coupling with an external electrical cable or...
7379677 Method of wavelength conversion and wavelength converter  
The wavelength converter comprises (1) an optical multiplexer for multiplexing an amplitude-modulated first light and reference light, which is continuous light having a wavelength different from...
7379640 Tunable dispersion compensator and method of manufacturing the same  
A tunable dispersion compensator in which a heater portion can be easily constructed to reduce cost. A tunable dispersion compensator includes: an optical fiber having a grating portion; a heating...
7376354 All optical clock recovery  
All optical clock recovery includes a transmitter for generating an optical timing signal. The transmitter includes a semiconductor laser for the production of a dynamically synchronizable timing...
7376310 Optical waveguide element with controlled birefringence  
An optical waveguide element having a cladding layer formed on a substrate and at least one waveguide core formed in the cladding layer for transmitting an optical signal. Two heater sections are...
7369779 Regeneration of optical phase modulated signals  
A regenerator for restoring the originally encoded optical phase of a differential-phase-shift-keyed signal. In an embodiment, the regenerator simultaneously provides limiting amplification and...
7369722 Coupled and non-coupled opto-electronic oscillators with enhanced performance  
This application describes coupled and non-coupled opto-electronic oscillators with enhanced performance. Coupled OEOs implement a dispersion compensation mechanism to reduce dispersion-induced...
7369715 Photonic link using angle modulation and method of use thereof  
Embodiments of a photonic link having low residual carrier, for use in transmitting information between an electronic signal source and an electronic signal receiver is provided. The photonic link...
7369714 High-speed electronic carrier-injection modulator based on high-index-contrast Si-waveguide  
An opto-electronic modulator includes a Mach-Zehnder structure that comprises p + in + -diodes in both arms of the Mach-Zehnder structure. The Mach-Zehnder structure is formed by waveguides so as...
7366368 Optical add/drop interconnect bus for multiprocessor architecture  
An optical bus interconnects two or more processors in a multiprocessor system. One or more electrical-to-optical (“E-O”) transmitters are optically coupled to the optical bus using optical...
7366362 QPSK light modulator  
The present invention provides a light transmitter with a stable IQ amplitude ratio relative to the characteristic change of a modulating system. The QPSK light modulator of the present invention...
7362924 Optical modulator  
An optical modulator using a thin plate capable of improving an S/N ratio of an output light is provided. The optical modulator including a thin plate 1 having an electrooptic effect and having a...
7362923 Systems and methods for measuring signal phase shift caused by optical fibers  
The present invention provides systems and methods for measuring signal phase shift caused by changes in fiber length.
7359588 Electroabsorption modulator and method of manufacturing the same  
Provided is a double waveguide electroabsorption modulator, in which two spot size converters are integrated between first and second optical waveguides, thereby reducing an insertion loss between...
7359580 Class-AB microwave-photonic link  
Embodiments of a photonic link having low residual carrier, for use in transmitting information between an electronic signal source and an electronic signal receiver are provided. One exemplary...
7345803 Optical modulator and optical modulating method  
In an optical modulation device ( 10 ) having an electrical/optical interaction region ( 11 ), an electrical signal line ( 3 ) is connected to an electrical signal input terminal ( 2 a ), another...
7333679 Thermophotometric phase shifter and method for fabricating the same  
In an aspect of the present invention, a thermo-optic phase shifter includes a substrate, a heater, a clad layer formed directly or indirectly on a substrate, an optical waveguide clad layer formed...
7325983 10GBASE-LX4 optical transceiver in XFP package  
An optical transceiver for including an electrical connector with a serial interface for coupling with an external electrical cable or information system device, a fiber optic connector adapted for...
7324713 Apparatus for and method of controlling optical interferometer  
An apparatus and method for controlling an optical interferometer are provided. The method includes setting a thermoelectric cooler (TEC) temperature of the optical interferometer to a room...
7321702 Optical modulator, optical transmitter, optical modulating method and manufacturing method of the optical modulator  
An optical interference unit branching inputted input light into two optical waveguides, combining the respective branched lights propagating through the respective optical waveguides and...
7317846 Propagation delay variation for a distributed optical modulator driver  
Propagation delay variations for a distributed optical modulator driver are described. In one example, a system includes a signal distribution network, a plurality of output driver stages coupled...
7308171 Method and apparatus for optical isolation in high power fiber-optic systems  
Methods and apparatus for optical isolation in high peak power fiber-optic systems prevent damage to a facet within a fiber-optic isolator caused by back-reflected light from, for example, an...
7308161 System and method for wavelength selective switching employing single-element gratings  
A wavelength selective switch device is disclosed that includes an elongated signal communication path extending from a first end of the device to a second end of the device. The signal...
7302121 Optical device and drive voltage supply device  
The present invention is directed toward an optical device and a drive voltage supply device, which prevent occurrence of a DC drift and enable stable selection of light of desired wavelength...
7298933 Optical module  
Provided is an optical module including a microstrip line, a traveling wave type optical device positioned in the end of the microstrip line, and at least one balanced open stub connected to the...
7295781 Polarization mode dispersion compensation  
Methods and systems for PMD compensation in an optical communication system are implemented by transmitting multiple optical signals through a common optical conduit to an optical compensator that...
7292754 Compensating interferometer including delay lines with reduced noise  
Methods and apparatus for reducing noise in optical apparatus comprising a delay line by utilizing a plurality of wavelength specific delay lines to delay an input waveform such as a pulse rather...
7289688 Passive method and apparatus for inducing mode conversion  
A waveguide for use in polarization mode converters and polarization modulators using extrinsic strain to prerotate the principal axes and control birefringence is disclosed herein. The invention...
7286726 Integrated active electrical waveguide for optical waveguide modulators  
An integrated active electrical waveguide is described for optical waveguide modulators. The active waveguide may include an optical waveguide, a plurality of modulators integrated into the...
7283689 Optical waveguide having high dielectric constant contrast between cladding and core  
According to embodiments of the present invention, an optical waveguide includes a high dielectric constant core material relative to the cladding material. The cladding material has an index of...
7283688 Method, apparatus and system for minimally intrusive fiber identification  
A method, apparatus and system for minimally intrusive fiber identification includes imparting a time-varying modulation onto an optical signal propagating in an optical fiber and subsequently...
7280712 Method and apparatus for phase shifiting an optical beam in an optical device  
An apparatus and method for high speed phase modulation of optical beam. For one embodiment, an apparatus includes an optical waveguide having adjoining first and second regions disposed in...
7277603 Integrated optical waveform modulation  
A method of modulating an optical carrier. A target carrier modulation is computed based on an input data signal. An effective length of an optical modulator is then controlled based on the target...
7272270 Optical modulator and method of manufacturing same  
Laser light emitted from a vertically confined surface emitting laser (VCSEL) is incident on a side surface near an end region of an optical waveguide. The end region of the optical waveguide is...
7266257 Reducing crosstalk in free-space optical communications  
An optical transmitter includes a modulator, a dispersion adjustment module, and an optical amplifier. The optical transmitter is configured to transmit optical pulses over a free-space optical...
7266256 High data-rate optical modulator bias circuit  
In one embodiment, an apparatus for a high data-rate optical modulator bias circuit is disclosed. The apparatus comprises an optical modulator, a voltage-controlled voltage source to translate a...
7263258 Programmable optical grating device and method  
An optical waveguide has a surface. An array of separately actuated bodies is disposed proximal to the exposed surface, and an actuator separately actuates at least some of the bodies to change a...
7263257 Gires-Tournois etalons and dispersion compensation  
A first embodiment of the invention provides a Gires-Tournois etalon (DGTE) 20 comprising a cladding mode suppressed optical fibre 22 , including an etalon section 24 in which a weakly...
7254295 Optical fiber interferometer with relaxed loop tolerance and QKD system using the same  
An optical fiber interferometer ( 10 ) with relaxed loop tolerance, and a quantum key distribution (QKD) system ( 200 ) using same is disclosed. The interferometer includes two optical fiber loops...
7245787 Bias adjustment method for optical SSB modulator or optical FSK modulator  
A method of appropriately adjusting a bias signal of an optical modulator is provided. For an optical modulator provided with a first sub Mach-Zehnder waveguide, a second sub Mach-Zehnder waveguide...
7239763 Optical SSB modulator  
An optical SSB modulator capable of appropriately adjusting a phase difference of light in the MZ waveguides and automatically adjusting a voltage impressed to the bias adjustment electrodes is...
7239762 Light modulation using the Franz-Keldysh effect  
An optical modulator includes at least one waveguide medium that receives light. An absorption medium absorbs the light under predefined conditions and outputs optically modulated light. The...
7233709 Electro-absorption modulator  
Embodiments of the invention provide an electro-absorption modulator including an optical waveguide and a microwave waveguide. The microwave waveguide is electromagnetically coupled to the optical...
7224506 Single side band modulation device  
A single side band modulation device includes a first Mach Zehnder interferometer and a second Mach Zehnder interferometer. The first Mach Zehnder interferometer includes at least two output arms,...
Matches 1 - 50 out of 546 1 2 3 4 5 6 7 8 9 10 11 >