Matches 51 - 100 out of 325 < 1 2 3 4 5 6 7 >
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6891674 Methods and apparatus for frequency shifting polarization mode dispersion spectra  
A polarization mode dispersion generator for generating polarization mode dispersion (“PMD”) spectra is provided. The generator includes a plurality of birefringent stages, each stage including...
6888971 Multi-port circulator  
An extendable four-port circulator includes a middle birefringent crystal, a first birefringent crystal, a first non-reciprocal device, a second birefringent crystal, and a second non-reciprocal...
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...
6873462 Three-port circulator  
A three-port circulator includes a non-reciprocal rotating element, a first birefringent wedge, and a second birefringent wedge. The non-reciprocal rotating element has a rotation axis and rotates...
6870675 Variable optical attenuator  
A variable optical attenuator is disclosed which comprises a plane-parallel birefringent element for separation/synthesis which separates light beams having orthogonal polarization directions on...
6859568 Polarization transformer for DC drift-free polarization transformation or polarization mode dispersion compensation  
A polarization transformer/PMD compensator chip contains a differential TE-TM phase modulator at its input. The modulator generates a TE-TM phase modulation. The mode converter voltages are driven...
6853488 Reflection-type optical circulator utilizing a lens and birefringent plates  
The present invention provides a reflection-type improved optical circulator. The reflection-type optical circulator includes at least one birefringent plate for receiving at least one signal light...
6853487 Multi-functional optical device utilizing multiple polarization beam splitters and non-linear interferometers  
An optical device includes: a first polarization beam splitter (PBS); a first set of optical rotators optically coupled to the first PBS; a second PBS optically coupled to the first set of optical...
6839169 Optical apparatus and method for selectively transmitting optical signals  
An optical apparatus and method for selectively transmitting optical signals utilizes an optical component having a controllable optical state to selectively manipulate the optical signals so that...
6829396 Wavelength characteristic control device, gain equalizer, and light amplifier  
A wavelength characteristic control device capable of variably controlling a wavelength characteristic in a satisfactory manner. A polarized light wavelength characteristic changing element has a...
6826319 Optical isolator  
An optical isolator ( 10 ) includes a first optical collimator ( 20 ), an optical isolating unit ( 30 ), a second optical collimator ( 40 ), and a tubular housing ( 50 ). The first optical...
6826323 Optical circulator  
An optical circulator has optical elements structured to control return loss for light propagating from an input port to an output port. In some embodiments, the optical circulator has a port...
6822793 Compact polarization insensitive circulators with simplified structure and low polarization mode dispersion  
Disclosed are optical circulators including a first beam displacer/combiner, a first nonreciprocal rotator, a first beam angle turner, a second beam angle turner, a second nonreciprocal rotator,...
6823142 Polarization mode dispersion compensating apparatus  
A signal light from an optical transmission line propagates on a first optical fiber and enters a polarization converter. The polarization converter converts the input light with the given...
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 beside...
6813077 Method for fabricating an integrated optical isolator and a novel wire grid structure  
A method for fabricating an integrated optical isolator includes depositing a wire grid material on a magneto-optical substrate and depositing a resist film on the wire grid material. The method...
6813076 Faraday rotator, optical isolator, polarizer, and diamond-like carbon thin film  
New material useful in miniature, low-cost Faraday rotators, polarizers (analyzers) and magnetic substances; in Faraday rotators and optical isolators that can handle a plurality of wavelengths;...
6813078 Process of producing a polarizer, polarizer, polarizing plate, and visual display  
A polarizer having good durability that is dyed by iodine, and is given boric acid processing, and moreover contains zinc without generating fault by deposit of boric acid or zinc, may be produced...
6795245 Polarization independent magnetooptic switches  
This invention provides polarization independent magnetooptic switches. Input optical signals are switched to different output ports via polarization manipulation utilizing magnetically switchable...
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...
6765722 Polarization beam combiner for fiber optic applications  
Two optical input channels carry two input optical signals in orthogonal polarization states while located at different radial distances relative to a GRIN lens, so that the two input signals exit...
6762879 Method and system for providing an optical circulator  
In another aspect, the invention provides a closed loop optical circulator including a first crystal for splitting an input light signal into two components, a second crystal for deflecting the two...
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...
6757097 Wavelength dependent isolator  
A wavelength dependent optical device comprising: at least two optical Ports ( 21, 22 ); a first series of polarisation modifying optical components ( 23, 25, 27, 28 ) placed between the two Ports...
6756781 Sensor for optically measuring magnetic fields  
Described are improved transmissive magneto-optical sensors that may be used to determine the magnitude and phase of a magnetic field surrounding a conductor, and when in contact with the...
6747797 Loop optical circulator  
A four-port loop optical circulator includes a first, a second, a third and a fourth optical ports for receiving optical beam therein. The circulator further includes a plurality of optical...
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 magneto-optic...
6735016 Electro-optically controllable polarization insensitive optical device  
A polarization independent optical device is provided wherein the device has two optical paths that include one or more birefringent crystals, a electrically controllable rotator, and a fixed...
6717706 State of polarization detector  
State of polarization detectors and polarization control systems are disclosed. For example, the invention features an integrated optical assembly including: (i) a series of polarization-sensitive...
6700704 System comprising a device necessitating the reception of linearly polarized beams and corresponding method  
A system including a first polarization element configured to linearly polarize at least one beam in open space, a processing device configured to receive linearly polarized beams at an input,...
6680797 Spatial light modulators for full cross-connections in optical networks  
A polarization-independent optical switch is disclosed for switching at least one incoming beam from at least one input source to at least one output drain. The switch includes a polarizing beam...
6678430 Method for DC drift-free polarization transformation and DC drift-free polarization transformer  
A polarization transformer/PMD compensator chip contains a differential TE-TM phase modulator at its input. The modulator generates a TE-TM phase modulation. The mode converter voltages are driven...
6678092 Reflection type faraday rotator with multiple reflection structure  
A reflection type Faraday rotator includes first to sixth reflection type sub-rotators. Light is made incident on the first to sixth sub-rotators while repeating reflecting thereat. A Faraday...
6674953 Controllably variable optical attenuator  
A controllable attenuator includes a pair of collimators respectively connected to input and output fibers. A pair of reflection devices are respectively positioned behind the pair of collimators...
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...
6665106 Method for optical polarization control  
The invention specifies a method and apparatus for optical polarization control which enable non-ideal component behavior to be corrected by means of a calibration table. This ensures shorter...
6657785 Bi-directional circulator  
The present invention relates to bi-directional circulators based on interleaver technology, e.g. birefringent crystal interleaver technology, that enables signals containing even number ITU...
6654167 Polarization scrambler and monochromator  
A polarization scrambler includes a Faraday element in which the thickness of a direction vertical to an optical axis changes continuously, and a magnetic field generator for generating a magnetic...
6650797 Wavelength characteristics control device, gain equalizer and light amplifier  
A wavelength characteristic control device capable of variably controlling a wavelength characteristic in a satisfactory manner. A polarized light wavelength characteristic changing element has a...
6646777 Optical isolator with improved mounting characteristics  
An optical isolator includes a first magnetic polar source having a first magnet axis, a second magnetic polar source having a second magnet axis parallel to the first magnet axis, and an optical...
6624938 Optical circulator  
An optical circulator for transmitting light along a first optical path from a first optical port to a second optical port and along a second optical path from the second optical port to a third...
6621630 Composite optical element, optical isolator, optical attenuator and processes for producing them  
An optical element comprises a Faraday rotator and first, second, third, and fourth birefringent regions. The first and second regions and a fifth region are joined to one plane of the rotator. The...
6600601 Polarization-independent optical isolator and production method thereof  
A polarization-independent optical isolator includes a first birefringent wedge plate having an inclined plane directed to a light incoming side; a second birefringent wedge plate having an...
6600148 Polarization mode dispersion measuring method and polarization mode dispersion measuring system  
According to the present invention, in a simple structure using a fixed analyzer method, in order to measure a smaller PMD value, a predetermined polarization mode dispersion is applied by 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...
6587266 Bi-directional isolator  
Bi-directional wavelength interleaving optical isolators provide the ability to pass a first set of optical signals (e.g., ITU even channels) from a first port to a second port, while preventing a...
6587267 Beam directing device  
Described are various optical devices having at least two optical waveguides for inputting and outputting optical beams coupled thereto by a single collimating lens. Located proximate to the lens...
6580842 Integrated optical circulator array  
A circulator array is constructed in a planar substrate by forming a plurality of waveguide pair structures, each waveguide pair structure having first and second sections respectively coupled by...
6580558 Optical isolator  
An optical isolator includes a first pigtail assembly, a first collimating lens aligned with the first pigtail assembly, an optical rotator assembly, an adjustable assembly aligned with the rotator...
Matches 51 - 100 out of 325 < 1 2 3 4 5 6 7 >