Matches 51 - 100 out of 323 < 1 2 3 4 5 6 7 >
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6577430 Bi-directional optical switch  
The present invention provides improved optical switches in which no mechanical movement is required to direct optical pathways between plural fiber ports and light transmission is bi-directional....
6570711 Virtual waveplate and optical channel interleaver formed therewith  
A conventional interleaver, based on a stack of waveplates, relies on the orientation and the birefringence of the waveplates to differentiate the polarizations of one set of channels from another,...
6560396 Variable optical attenuator  
This invention is related to method for assembling an optical attenuator to attenuate an optical beam. The method includes a step of a) collimating the optical beam from an input optical waveguide...
6552836 High performance polarization controller and polarization sensor  
The invention is an instrument for sensing the state of polarization (SOP), and for transforming the SOP of a beam of light from an incident continuously-varying arbitrary SOP to a desired exit...
6542647 Optical signal transmission system and magneto-optical modulator designed to establish modulation over wide range for use in the same  
An optical signal transmission system equipped with a magneto-optical modulator is provided. The magneto-optical modulator works to modulate an optical beam emitted from a light source and consists...
6532316 Bi-directional polarization-independent optical isolator  
A bi-directional polarization independent optical isolator simultaneously transmits two separate signal rays in opposite forward directions and simultaneously suppresses backward transmission of...
6483645 Garnet crystal for Faraday rotator and optical isolator having the same  
An optical isolator comprsing at least two parts of a Faraday rotator obtained from a garnet crystal and an analyzer, which is small in size, can be mounted directly to a semiconductor laser. The...
6480331 Reflection-type polarization-independent optical isolator, optical isolator/amplifier/monitor, and optical system  
A variety of polarization independent optical isolators, including a single stage polarization independent optical isolator, a single stage broadband polarization independent optical isolator, a...
6476956 Fast optical modulator  
A short pulse of radiation is generated by shining radiation through a magneto-optical material. The material is excited twice to rapidly change a property of the wave, such as the direction of the...
6476967 Compact optical circulator with three ports  
The invention provides a compact optical circulator with three ports positioning between a dual-core collimator and a single-core collimator. The inventive circulator has a propagation director to...
6462856 Method and apparatus for modulating an optical signal using polarization  
A low-rate data transmission system and method are disclosed that use the Faraday effect to modulate the polarization state of light traveling in an optical fiber. The resulting change in...
6462857 Optical modulator and optical modulation method  
An optical modulator includes a magnetic ferrite single crystal, an optical source, a photoreceptor system and an analyzer. The magnetic ferrite single crystal has a transducer mounted and arranged...
6449091 Optical isolator  
Tuning to maximize the isolation provided by an optical isolator to one of a predetermined plurality of wavelengths is achieved by tilting the isolator with respect to an input beam of light....
6441944 Optical attenuator using isolator and optical communications system including the same  
An optical attenuator using an isolator, and an optical communications system including the same, function to control the intensity of an input optical signal. The isolator comprises a Faraday...
6437885 Semiconductor sensor for optically measuring polarization rotation of optical wavefronts using rare earth iron garnets  
Described are the design of a rare earth iron garnet sensor element, optical methods of interrogating the sensor element, methods of coupling the optical sensor element to a waveguide, and an...
6430323 Polarization maintaining optical isolators  
Optical isolators for use in fiber optic networks utilizing a birefringent wedge set with a Faraday rotator disposed between the birefringent wedges. In a first embodiment a polarization...
6421176 Optical isolator  
An optical isolator having a constitution in which a Faraday rotator is sandwiched by two polarizers, which can be more easily produced at a reduced cost. An optical isolator is constituted so that...
6404549 Optical circulator  
The invention provides an optical circulator that comprises three ports with the property that light entered through the nth port is output through the (n+1)th port. It can be applied to optical...
6384957 Variable optical attenuator utilizing Faraday effect  
The present invention aims at providing a variable optical attenuator to achieve the reduction of the wavelength-dependency of the entire device, by optimizing the magneto-optical system of the...
6366390 Pulse interleaver  
A pulse interleaver splits an input pulse train into at least two optical branches ( 20,22 ). A first one of the branches ( 20 ) carries a first signal, and is terminated with a mirror ( 24 ) and a...
6359722 Optical isolator with a compact dimension  
The present invention provides a compact optical isolator. A polarizer 2 A and/or an analyzer 2 B of an optical isolator 1 are/is formed of a cobalt magnetic substance minute particle cluster...
6348165 Semiconductor magneto-optical material  
A semiconductor magneto-optical material includes a semiconductor dispersed with fine magnetic material particles and is characterized by exibiting magneto-optical optical effect at ordinary room...
6330117 Optical isolator module and optical amplifier using the same  
An optical isolator module in which an optical splitter for splitting an optical signal input through an input port, an optical detector for detecting the separated light, and a compensator for...
6327089 Laminated transparent structure for reflective display  
A laminated transparent structure for a reflective display which is used, for example, as a head-up display of an automotive vehicle. The laminated transparent structure comprises a glass plate. A...
6317250 Optical isolator using multiple core fibers  
A method and apparatus for optically isolating multiple core optical fibers while at the same time substantially reducing polarization mode dispersion, is disclosed. A multiple core fiber is...
6309557 Magnetic garnet material and faraday rotator using the same  
An object is to provide a magnetic garnet material, even if a thickness of an element is made thin, in which a sufficient Faraday rotation capacity can be obtained, a magnetic field for saturation...
6297901 Optical attenuating isolator  
An optical attenuating isolator obtained by combining an optical attenuator and an isolator into a module, is provided. The optical attenuating isolator includes a first collimator, an optical...
6288827 Faraday rotator  
Disclosed is a Faraday rotator capable of reducing the temperature dependence on a Faraday rotation angle, thereby enhancing the temperature characteristic, particularly, in a service environment...
6289152 Multiple port, fiber optic coupling device  
A coupling device has a first focusing element positioned on a first optical axis. The first focusing element is couplable to receive output light beams from a plurality of optical fibers, and has...
6278547 Polarization insensitive faraday attenuator  
A polarization insensitive optical attenuator is disclosed. Three birefringent wedges are disposed along an optical path with their respective optical axes aligned. The apex angle of the second...
6275323 Optical attenuator  
A specific polarized light component out of a light wave passed through a magneto-optic crystal (for example YIG) is extracted by a polarizer. The intensity of the light beam output from the...
6243193 Magneto-optical light modulator  
A magneto-optical light modulator includes a first polarizer, a transparent magneto-optical component including a magneto-optical film deposited on a surface of a substrate, and a second polarizer....
6226116 Magnetic micro-shutters  
A spatial light modulation device is formed by creating at least one movable element, fixedly attached to the substrate at a first end, from a soft magnetic material with an anisotropic stress...
6198567 Faraday rotation variable attenuator  
A variable optical attenuator comprises a Faraday rotator including a ferromagnetic garnet film disposed input/output single mode optical signal paths. A collimating/lensing arrangement is used to...
6195479 Fiberoptic reflective variable attenuator and on-off switch  
A polarization-insensitive fiberoptic reflective variable aftenuator and on-off switch is provided. The device has a sleeve holding a pair of optical fibers, a first, second and third birefringent...
6181460 Electromagnetic force controlled micromirror array  
A micromirror device (10) is provided with a rotatable optical component (22) for use in a digital image processing application. The micromirror device (10) includes a semiconductor wafer (12),...
6141140 Optical modulator using isolator and optical transmitter including the same  
An optical modulator using an isolator, and an optical transmitter including the same are provided. The optical modulator modulates a carrier wave generated by an optical source according to a...
6108120 Faraday rotation angle varying apparatus  
A Faraday rotation angle varying apparatus for controlling a Faraday rotation angle of a light beam passing through a garnet single crystal having a Faraday effect by applying external magnetic...
6088149 Apparatus for use in ring laser gyroscopes  
The invention is a focusing polarization rotator for use in the resonant mirror system of a ring laser gyroscope. The focusing polarization rotator accomplishes the traditional task of rotating the...
6075642 Multi-port optical isolator  
An optical nonreciprocal apparatus, preferably an optical isolator, and a method of isolating propagation of light signals from multiple input optical fibers to multiple output optical fibers...
6031652 Bistable light modulator  
A modulator for modulating an incident beam of light includes a substrate having a cavity formed therein and a plurality of spaced-apart deformable elements formed in the cavity. The deformable...
6018411 Optical device utilizing magneto-optical effect  
The present invention provides an optical device making use of a magneto-optical effect. The optical device comprises: a reflector for reflecting an input beam as a reflected beam; a...
6014244 Multi-port optical circulator utilizing imaging lens and correction optical element  
A nonreciprocal optical device, preferably an optical circulator, and a method of transferring optical signals utilize a compensating lens coupled optically to a focusing lens. The compensating...
6014475 Fiber optic circulator  
A non reciprocal optical device for transmitting light in a forward and reverse direction substantially independently of polarization state from a collection of waveguides. The device includes: a...
6008928 Multi-gas sensor  
A multi-gas sensor is provided which modulates a polarized light beam over a broadband of wavelengths between two alternating orthogonal polarization components. The two orthogonal polarization...
6002512 Optical circulator using latchable garnet  
An optical circulator is disclosed that utilizes a polarization rotator comprising a polarization changer (e.g., a properly-oriented half-wave plate) in combination with a pair of latched garnet...
5999305 Optical device which makes use of magneto-optical effect  
An optical device which can be used as a Faraday rotator which can provide an arbitrary Faraday rotation angle in accordance with a positional condition. The optical device includes first and...
5986784 Adaptive polarization diversity detection scheme for coherent communications and interferometric fiber sensors  
A method and apparatus for overcoming polarization induced signal fading in both heterodyne communication and interferometric sensing. An adjustable birefringent element in series with a...
5981075 Optical articles and devices with a thin film containing krypton, xenon, or radon atoms  
An optical article includes an optical thin film laminated on a surface of a substrate. The optical thin film includes atoms of at least one selected from the group consisting of krypton, xenon and...
5956171 Electro-optic modulator and method  
An optical intensity modulator which uses a Sagnac interferometer having an electro-optic phase modulator therein. An electric modulation signal is delivered to the modulator, and the latter is...
Matches 51 - 100 out of 323 < 1 2 3 4 5 6 7 >