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7440642 Integrated optical modulator and method for manufacturing the same  
An integrated optical modulator and method for manufacturing thereof are disclosed. The integrated optical modulator comprises a carrier wave band modulator using a double sideband modulation...
7418205 Method and apparatus for controlling a frequency hopping laser  
An optical spread spectrum communication system includes a tunable laser which sequentially outputs optical signals having different wavelengths. The laser produces a frequency spectrum having a...
7391978 Optical signal transmitter and optical signal transmission system  
The invention provides an optical signal transmitter low in noise and in distortion and provides an optical signal transmission system using this optical signal transmitter. The optical signal...
7391550 Method and apparatus for optical broadband frequency chirp  
Techniques for producing an optical broadband frequency sweep or chirp, include generating a narrowband frequency chirp and a frequency-shifted replica. The narrowband chirp has an optical carrier...
7379652 Method and apparatus for detecting optical spectral properties using optical probe beams with multiple sidebands  
Techniques for detecting optical spectral properties of a target are described. The technique includes providing an optical carrier which has an optical frequency bandwidth which is narrow compared...
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...
7310181 Optical deflection device and optical deflection method that control occurrence of alignment defect  
An optical deflection device includes an optical deflection element having a pair of transparent boards arranged in a mutually opposing manner. A liquid crystal layer is filled between the boards...
7292751 Optical coupled-resonator filters with asymmetric coupling  
An optical filter includes at least one waveguide structure. The optical filter also includes a plurality of optical resonators that are aligned in an coupled arrangement with the at least one...
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,...
7126739 Method and apparatus for optical pulse characterization using simplified chronocyclic tomography  
A method and apparatus for characterizing light from an optical source using simplified chronocyclic tomography by modulating the phase of light from an optical source using alternating positive...
7102755 Method for determining power of modulated signals from a frequency transformed interferogram  
A method determines power of a modulated signal that is applied to a wavelength meter by summing bin values within a designated bin range of a frequency transformed interferogram representing the...
7092643 Optical transmission apparatus and bias voltage control method for the optical modulator  
The optical transmission apparatus has a Mach-Zehnder optical modulator, a light source for applying an optical signal of a continuous light to the optical modulator, a driving circuit for...
7068412 Multi-wavelength generating method and apparatus based on flattening of optical spectrum  
With respect to the relative intensity noise (RIN) for inputs to an optical modulator or the signal-to-noise ratio (SNR) for outputs therefrom, the optical modulator modulating coherent lights of...
7046414 Optical modulation system applying a highly stable bias voltage to an optical modulator  
An optical modulator is driven by applying, to a first signal electrode, an amplitude-modulated input driving signal waveform, which has a pair of same phase envelope lines, and which has a full...
7024056 Electro-optic gating arrangement with improved duty cycle  
The device includes an oscillator ( 1 ) to generate an electrical signal of a predetermined frequency and a signal divider ( 2 ) to split the electrical signal into first and second signals. The...
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 V...
6965479 Optical filter, interleaver, and optical communication system  
A first optical system ( 11 ) has a first beam splitter ( 211 ). The first beam splitter ( 211 ) splits light arriving through a first optical path (P 1 ) into two light beams, and outputs one...
6906309 Injection-seeding of a multi-tone photonic oscillator  
A multi-tone photonic oscillator comprises a laser; an optical modulator coupled to the laser; and a delay line and a photodetector coupled to the optical modulator for generating a delayed...
6885490 Method and apparatus for characterizing optical pulses using reduced complexity chronocyclic tomography  
A method and apparatus for characterizing an optical pulse using a reduced complexity chronocyclic tomography is described. In one example, an optical pulse train is modulated using quadratic...
6834134 Method and apparatus for generating frequency modulated pulses  
A method and apparatus are provided for generating short (e.g., picosecond) pulses using a 2 section 1553 nm DBR laser without gain switching nor external modulation. The center wavelength of the...
6816299 Method and system for optimization of an optical transmission signal which is modulated with a binary data signal  
A method and system for optimization of an optical transmissions signal which is modulated with a binary data signal, wherein a control device ensures that the operating point and the modulation...
6768570 Optical modulator  
Desired characteristic impedance can be obtained in an optical modulator. The optical modulator includes a substrate having the electrooptic effect; an optical waveguide formed on a surface of the...
6762882 System and method for use of dark field fourier diaphragm in multi-frequency imaging  
An imaging system is disclosed that includes an illumination source, a modulator and a variable Fourier diaphragm. The illumination source produces a first illumination field having a first...
6751001 Non-sampled auto-format conversion method  
A device for the passive conversion of one format to another includes: a laser light source at a predetermined frequency, a line converter configured to produce a fan of light, a movable lens...
6746618 Electro-optic ceramic material and device  
The present invention provides an electro-optic ceramic material including lead, zinc and niobium having a propagation loss of less than about 3 dB/cm and a quadratic electro-optic coefficient of...
6744547 Laser wavelength converter  
A nonlinear optical crystal device, a wavelength conversion element, is surrounded with a heat sink having cooling fins. Cartridge heaters for uniformly heating the nonlinear optical crystal device...
6711309 Noise suppression in lightwave communication systems  
An optical communications system comprises, among other things, a laser source; an optical waveguide interconnected to the laser source to carry an optical signal from the source to an optical...
6667826 Chromatic modulator for high resolution CCD or APS devices  
A system for providing high-resolution color separation in electronic imaging. Comb drives controllably oscillate a red-green-blue (RGB) color strip filter system (or otherwise) over an electronic...
6643470 FM signal converter, FM signal optical transmitter and FM signal optical receiver  
An FM signal converter comprising: an amplitude detecting unit for detecting amplitude variation of a plurality of signals that are multiplexed with subcarriers, as an amplitude variation signal;...
6538793 Electronically tunable and modulatable quasi-optic grid oscillator  
The present invention discloses an electronically frequency tunable and phase modulatable quasi-optic grid oscillator. The oscillator includes a reference signal input port whereby a small external...
6532099 Optical communications apparatus  
A large, high-speed optical communications apparatus is provided capable of selecting a signal transmission route in optical domain. An address extractor 101 extracts address information from...
6525862 Methods and apparatus for optical imaging  
Methods and apparatus directed to using modulation to substantially improve detection limits in optical imaging, and to substantially improve the performance of various optical imaging systems. In...
6519076 Methods and apparatus for optical imaging  
Methods and apparatus directed to using modulation to substantially improve detection limits in optical imaging, and to substantially improve the performance of various optical imaging systems. In...
6515788 Light modulation system including a superconductive plate assembly for use in a data transmission scheme and method  
A method and apparatus for modulating light, wherein a light source provides light of a certain wavelength to be modulated by a layer of superconducting material which forms part of a specifically...
6512619 Frequency modulation apparatus  
A first optical modulator converts an electrical signal into an optical-frequency-modulated signal, supplying the same with unmodulated light from a local light source to a first optical receiver....
6496296 Method and apparatus for accommodating for wavelength drift of optical sources  
A method and apparatus accommodate for wavelength drift of optical sources. The apparatus includes an optical source having a wavelength control port and an output port, providing one or more...
6452714 Enhanced feed forward optical frequency/phase demodulator  
A demodulation system used in connection with an analog optical link. An optical carrier signal modulated with an RF signal is split into two portions. One carrier signal portion is applied to a...
6445487 Speckle suppressed laser projection system using a multi-wavelength doppler shifted beam  
A system and method for reducing or eliminating the speckle intensity distribution of a laser imaging system. In one embodiment of the invention, a radio frequency signal is injected into a...
6429958 Extinction ratio optical communication device using superconducting films  
The optical assembly for modulating input light and providing modulated light at an output thereof includes a first arrangement, which includes a layer of a superconductive material having at least...
6295155 Spatial frequency converting device and optical system having the same  
A spatial frequency converting device in which the amount of conversion of spatial frequency characteristics is variable. An optical system using the spatial frequency converting device is a...
6285487 Light modulation system including a superconductive plate assembly for use in a data transmission scheme and method  
A method and apparatus for modulating light, wherein a light source provides light of a certain wavelength to be modulated by a layer of superconducting material which forms part of a specifically...
6236507 Apparatus to transform two nonparallel propagating optical beam components into two orthogonally polarized beam components  
The invention features systems and methods for generating optical beams having substantially orthogonal polarizations for use in distance measuring interferometry. In one embodiment, the invention...
6211996 Angle modulator  
An angle modulator branches a light emitted from a light source 101 into a first light and a second light. An optical intensity modulator 104 subjects the first light to predetermined optical...
6204954 Technique for measuring the Vpi-AC of a mach-zehnder modulator  
In an optical communication system, efficient use of a Mach-Zehnder modulator requires accurate knowledge of the AC halfwave voltage at the desired modulation frequency. At high modulation...
6201632 Feed forward optical frequency/phase demodulator  
A demodulation system used in connection with an analog optical link that provides a wide dynamic range and SNR potential for large RF signal bandwidths. An optical carrier signal modulated with an...
6175412 Optical component for polarization modulation, a mueller polarimeter and ellipsometer containing such an optical component, a process for the calibration of this ellipsometer, and an ellipsometric measurement process  
6115170 Light modulation system for use in a data transmission scheme and method  
A light modulation system, wherein a light source provides light of a certain wavelength to be modulated by a material layer, which forms part of a specifically configured plate assembly. The...
6014243 FM modulators  
An input signal input to a 180 degree distributor is distributed as two signals, one of which with its phase inverted 180 degrees is input to a first modulation light source and the other with its...
5973820 FM modulation device  
A branch portion 107 branches a modulating signal into two signals in opposite phases. One of them is inputted to an FM laser element 102. The other one is adjusted in propagation delay and in...
5969663 Time domain radio transmission system  
A time domain communications system wherein a broadband of time-spaced signals, essentially monocycle-like signals, are derived from applying stepped-in-amplitude signals to a broadband antenna, in...
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