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7050216 Variable optical filter  
A variable optical filter comprises a first polarizer, a first phase difference element operable to generate a phase difference, a variable Faraday rotator operable to impart a variable Faraday...
7050231 Faraday rotator with metal reflection film  
A Faraday rotator of multilayer film type is provided which can achieve excellent optical characteristics with a reduced number of layers. In the Faraday rotator, a metal reflection film, a...
7038834 Optical deflector and method of producing same  
There are provided a small optical deflector that can be driven at a high speed with a low voltage, provides a large angle of deflection, has a low distortion even in high speed operation and has...
7027198 Generation and analysis of state of polarization using tunable optical polarization rotators  
This application describes optical monitoring devices and applications in optical systems for monitoring various optical parameters of light, including the signal to noise ratio, the degree of...
7027201 Optical modulation element and projection apparatus  
An optical modulation element is capable of forming a reflective diffraction grating in which heights of a plurality of elements each having a reflecting surface periodically change. The...
7016096 Transmission wavelength characteristics variable optical element, and wavelength characteristics variable apparatus, optical amplifier, and optical transmission system, using same  
An object of the invention is to easily realize an optical element using an etalon type structure, capable of changing a periodic transmission wavelength characteristic in an axial direction of...
7006273 Faraday rotation device and optical device using same  
Optical devices including a Faraday rotation devices improved in wavelength and temperature characteristics and an optical attenuator reduced in wavelength dependence and temperature-dependent...
6985276 Magnetooptic element exploiting spin chirality  
A magnetooptic element whose size is essentially that of a lattice, namely several angstroms in size of magnetic material and which at the same time has its exhibiting magnetooptic effect...
6952300 Magneto-photonic crystal isolators  
A magneto-optical isolator (20) for an optical circuit. The isolator includes a substrate, and an optical channel (350) disposed next to the substrate. The optical channel and substrate are...
6947194 Method for compensating polarization mode dispersion, polarization mode dispersion compensator and optical fiber communication system  
An optical signal is introduced into a polarization rotator to control the optical signal so that the output of the optical signal is maximized through the rotation of a plane of polarization of...
6943932 Waveguide mach-zehnder optical isolator utilizing transverse magneto-optical phase shift  
A device and method for optical isolation for use in optical systems is disclosed. The device provides for a waveguide optical isolator fabricated using two arms, made of optical waveguides...
6934068 Magnetic field and electrical current visualization system  
Magnetic field and/or electrical current imaging systems utilizing magneto-optical indicator films (MOIF) based on magneto-optical material with in-plane single easy axis type of magnetic...
6919989 Integrated optical isolator and polarization beam combiner  
A device functions as a polarization beam combiner and an isolator. When light is transmitted in a first propagation direction, a second beam is displaced towards a first beam. The second beam has...
6906843 Ferrule attachment type optical isolator, and manufacturing method thereof  
An optical isolator comprising a combination of an optical isolator main body and a holder holding the optical isolator main body, the optical isolator main body including a Faraday rotator...
6876481 Spatial light modulator  
A spatial light modulator includes: a magnetic layer that is made of a magneto-optic material and includes a plurality of pixels in each of which a magnetization direction is independently set and...
6876480 Farady rotation device and optical device comprising it  
Optical devices including a Faraday rotation devices improved in wavelength and temperature characteristics and an optical attenuator reduced in wavelength dependence and temperature-dependent...
6867895 Faraday rotator  
A Faraday rotator which is improved in temperature-dependent Faraday rotation angle characteristic and thus in quality. Faraday rotation is caused by a first magnetic field applied to a...
6862126 TRANSMISSION WAVELENGTH CHARACTERISTICS VARIABLE OPTICAL ELEMENT, AND WAVELENGTH CHARACTERISTICS VARIABLE APPARATUS, OPTICAL AMPLIFIER, OPTICAL TRANSMISSION SYSTEM, AND CONTROL METHOD OF TRANSMISSION WAVELENGTH CHARACTERISTICS, USING SAME  
The present invention aims at providing a transmission wavelength characteristics variable optical element which can actively equalize changes of the wavelength characteristics due to temperature...
6859298 Optical module of optical isolator structure  
Disclosed is an optical module of an isolator structure including a semiconductor laser, a polarizer, and a Faraday rotator. The laser outputs a first linearly-polarized beam of a predetermined...
6853473 Faraday rotator and optical device comprising the same, and antireflection film and optical device comprising the same  
The invention relates to an optical device for polarizing light by changing its Faraday rotation angle, such as optical attenuators, optical switches or polarization controllers; and its object is...
6833941 Magneto-optic optical device  
To provide a magneto-optic optical device, such as a variable optical attenuator, an optical modulator or an optical switch, that is small, has a low power consumption and has high speed. The...
6829076 Actuator apparatus  
An actuator apparatus, comprising a rotating shaft supported in a freely rotating condition, a rotor magnet consisting of a permanent magnet which is polarized at two poles and is fastened to the...
6816300 Optical apparatus  
An optical device includes a Faraday rotator made of a bismuth substituted rare earth iron garnet single crystal (BIG) having a Faraday rotation of 45 degrees, and permanent magnets arranged...
6813056 High amplitude fast optical modulator  
A short intense pulse of radiation is generated by shining radiation through a magneto-optical material and providing multiple stimulations to the material. The material is excited multiple times...
6785037 Faraday rotator  
A Faraday rotator of multilayer film type is provided in which satisfactory optical characteristics are obtained with a small number of layers. In the Faraday rotator, a first periodic dielectric...
6785431 Miniature circulator array devices and methods for making the same  
Miniature optical devices, including circulator array devices, are fabricated using thin film coating technology. A typical optical device according to the present invention includes a spatial...
6770223 Article comprising a faraday rotator that does not require a bias magnet  
Faraday rotator garnet thick films have improved specific Faraday rotations without requiring a bias magnet. Films of nominal composition BiX(EuZHo1-Z)3-XFe5-YGaYO12 are grown lattice matched to...
6757101 None-mechanical dual stage optical switches  
The present invention provides improved optical switches in which no mechanical movement is required to direct optical pathways between plural fiber ports. Advantageously, the inventive switches...
6757093 MEMS reflectors having tail portions that extend inside a recess and head portions that extend outside the recess and methods of forming same  
A MEMs structure can include a recess in a substrate, the recess having a side wall and a floor. A tail portion of a moveable reflector is on the substrate and extends beyond the side wall of the...
6753997 Magnetic field generator for optical devices utilizing magneto-optical effect  
A small-sized magnetic field generator which is suitable for mass production and provides better output stability. A plurality of coils are formed on a non-magnetic insulating material by...
6751004 Optical system with magnetorheological fluid  
An optical system includes a layer of magneto rheological (MR) fluid having a surface exposed to air or vacuum. The MR fluid has a first state wherein the surface is reflective, and a second state...
6747774 Apparatus and method for controlling optical gain profiles  
The invention includes an apparatus for processing an input optical beam. The apparatus has at least one variable optical element to dynamically alter the polarization state of an optical beam to...
6745942 Magnetic symbology reader  
A magnetic symbology reader has a housing containing a polarized light source which directs light through a magneto-optic sensor onto a reflector which reflects light back through the...
6731855 Variable optical attenuator  
A variable optical attenuator (99) comprises a holder (4), a rotatable mechanism (5), a refractor (6), an input port (2) and an output port (3). The input port and the output port are engaged with...
6724514 Faraday rotator with improved magnetooptic property  
A liquid phase epitaxy method is used to grow the Faraday rotator with a small saturation field (Hs). The Faraday rotator has the formula: Bi3−x−y−zGdxTbyMzFe5−w−nGawPnO12, where M is selected...
6717715 Flexureless magnetic micromirror assembly  
A micro-optical switch including a flexureless magnetic micromirror hinged centrally over a pin, cone or the like. The pin, cone or the like allows the micromirror to rapidly switch or tilt into a...
6717730 Tunable optical filter  
An optical filter including first and second polarizers, a Faraday rotator and a birefringent element operating together to filter light with a changeable optical transmittance versus wavelength...
6717713 Variable optical attenuator which applies a magnetic field to a faraday element to rotate the polarization of a light signal  
An apparatus which attenuates a light signal polarized in a first direction. The apparatus includes a polarization rotation unit and an output unit. The polarization rotation unit rotates the...
6673146 Method of manufacturing a magnet-free faraday rotator  
A method of manufacturing is used to manufacture a magnet-free Faraday rotator having a square hysteresis loop, the Faraday rotator being formed of a bismuth-substituted rare earth iron garnet...
6670810 System and method for distributed monitoring of surroundings using telemetry of data from remote sensors  
A system and method for gathering and analyzing data captured from one or more remote sensing units positioned in the field. Remote sensing units preferably utilize optical sensors. Power to...
6667827 Beam shutter  
A beam shutter is provided which comprises a plane-parallel birefringent element for separation arranged to separate input light beams having orthogonal polarization directions on the same optical...
6661560 Magneto-optical modulator for superconducting digital interface  
A magneto-optic modulator modulates signals from a superconducting circuit such as a single-flux-quantum (SFQ) logic system onto a carrier wave light beam. The modulator is formed by depositing a...
6661935 Optical signal processing apparatus and method  
An optical signal processing apparatus includes a YIG monocrystal serving as a magnetic body. A microstrip is provided on one main face of the YIG monocrystal, and microwaves are input to the...
6618182 Magneto-optic switching element comprising a faraday rotator  
In a magneto-optical switching element with a Faraday rotator, in order to increase the switching speed and to reduce the required switching energy respectively, the rotator consists of a...
6597506 Birefringent optical devices and methods  
An optical device includes a first birefringent crystal having a refractive index difference Δn1 and a length l1 and a second birefringent crystal having a refractive index difference Δn2 and a...
6594068 High switching speed digital faraday rotator device and optical switches containing the same  
In all-optical networks, high speed optical switching and routing becomes one of the most important issues for interconnecting the transport network layers. This invention describes novel...
6580546 Faraday rotator  
The present invention relates to the use of magnetic materials in combination with magneto-optic materials to improve performance of Faraday rotator devices by enhancing the latching capability...
6577779 Ferrule connection type optical isolator with optical fiber  
A ferrule connection optical isolator with an optical fiber, wherein the optical isolator includes a ferrule with at least one processed end surface. The optical fiber consists of two kinds of...
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....
6577431 System of angular displacement control for micro-mirrors  
A system of angular displacement control for micro mirrors includes a stationary vertical element, a stationary horizontal element and an interference eliminator. Alternatively, the stationary...
Matches 51 - 100 out of 245 < 1 2 3 4 5 >