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7433558 Methods for optical isolation in high power fiber-optic systems  
Methods 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 optical amplifier....
7426069 Optical apparatus and imaging apparatus  
An optical apparatus is disclosed. The optical apparatus includes: a first optical element having a first polarizing layer containing a material having a refractive index that changes in accordance...
7379226 Variable optical attenuator  
A variable optical attenuator comprising a separation/combination birefringent element, fixed polarization rotation means, a convex lens, variable polarization rotation means, and a mirror which...
7362504 Miniature circulator 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 includes two refraction elements arranged opposite each...
7361884 Polarization independent optical isolator and optical transmitting/receiving apparatus  
A polarization independent optical isolator includes: a first birefringent plate that divides the receiver light from the optical transmission path into normal light and abnormal light to output...
7336418 Optical attenuator  
An optical attenuator with increased dynamic range and reduced temperature-dependence over the dynamic range. The optical attenuator has a Faraday rotational angle variable device which applies an...
7333685 Variable optical attenuator systems  
Low loss, reliable variable optical attenuators and 1×2 switches and polarization insensitive low loss, reliable variable optical attenuators and 1×2 optical switches are described. In one...
7333261 Magnetic garnet material, faraday rotator, optical device, bismuth-substituted rare earth-iron-garnet single-crystal film and method for producing the same crucible for producing the same  
A of producing a magnetic garnet material of which the light absorption characteristics worsen little even though it is produced through LPE. The crucible for LPE is formed of a material containing...
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...
7259913 Faraday rotator for high output lasers  
A Faraday rotator in which the isolation function based on a temperature rise is not deteriorated even when the Faraday rotator is used for a high output laser of not smaller than 1W output at a...
7257287 Optical interleaver  
In accordance with an exemplary embodiment of the present invention, an optical device includes an interleaver/deinterleaver, which includes a passive thermal compensator, wherein an optical signal...
7253956 Optical isolator element, a method for producing such an element, and an optical isolator using such an element  
An optical isolator is constructed such that an optical isolator element in which at least one flat Faraday rotator and at least two flat polarizers are bonded to each other into an integral unit...
7230760 Polarizers and isolators and methods of manufacture  
A passively aligned optical isolator includes laminated layers of material including two polarizing glass layers sandwiching a Faraday rotator layer. Each polarizing glass layer comprises a glass...
7206116 Faraday rotator  
A Faraday rotator for a Faraday isolator with an input polarizer, with an output polarizer, with a roller-shaped optical crystal that is arranged therebetween and that is arranged symmetrical to...
7187497 Polarization insensitive optical switching and routing systems and methods of manufacturing and operation  
Polarization converter assemblies are utilized to provide switching and routing systems with effective coupling between a first and second router assemblies, and to provide polarization insensitive...
7187496 Manufacturing method of optical device, optical device, manufacturing method of faraday rotator, and optical communication system  
There are provided a manufacturing method of an optical device excellent in expediency, and a technique for stably manufacturing a high performance optical device. After a single crystal film which...
7173762 Optical isolator with reduced insertion loss and minimized polarization mode dispersion  
An isolator is disclosed that features a single birefringent correction element. The correction element is configured to eliminate differential group delay and walk-off simultaneously.
7164823 Optical isolator using photonic crystal  
An optical isolator using a photonic crystal. The optical isolator includes an input portion that in turn includes an input waveguide part and an input waveguide having a taper portion formed in...
7158301 Method and device for modifying the polarization state of light  
A magnetic, single-axis crystal is used to modify the polarization state of light, whereby light passes through pre-determined areas of the crystal. To change the polarization state of the light, a...
7142362 Optical attenuator  
A low-cost compact optical attenuator structure has an input port and an output port for optical signals arranged side by side; a reflecting member arranged to face both ports to reverse light from...
7133189 Magnetic garnet material, faraday rotator, optical device, bismuth-substituted rare earth-iron-garnet single-crystal film and method for producing the same and crucible for producing the same  
Proposed is a technique of producing a magnetic garnet material of which the light absorption characteristics worsen little even though it is produced through LPE. The crucible for LPE is formed of...
7116480 Method and apparatus for optical switching  
An optical switch includes a first port, a second port, a first component group, a second component group, and a switching component group. The switching component group includes a reflector, a...
7106512 Wavelength selective switching device and method for selectively transmitting optical signals based on wavelength  
A wavelength selective switching device and method for selectively transmitting optical signals based on wavelength utilizes diffraction to spatially separate the optical signals of different...
7095559 Variable optical delay circuit  
In a variable optical delay circuit to be used for compensation for polarization mode dispersion of an optical signal and for other purposes, there are provided a first birefringent member, a...
7081996 Isolated polarization beam splitter and combiner  
An isolated polarization beam splitter or combiner, for joining light from different inputs into one common port, and for dividing a beam of light into orthogonal polarizations. In both modes of...
7079319 Optical signal control device and method for utilizing same  
An optical device that receives polarization components of input light, spatially separates the polarization components, provides the polarization components with a angles of polarization and...
7072113 Wavelength selective switching device and method for selectively transmitting optical signals based on wavelength  
A wavelength selective switching device and method for selectively transmitting optical signals based on wavelength utilizes diffraction to spatially separate the optical signals of different...
7072111 Reflection-type optical device  
A reflection-type optical device used for an optical communication system, in which an element structure can be simplified and excellent optical characteristics are obtained. The reflection-type...
7050230 Optical switch device  
Light incident on an input optical fiber is separated into p-polarized light and s-polarized light by a birefringent crystal. A voltage to be applied to a liquid crystal element having electrodes...
7046416 Polarization scrambler and a method for polarization scrambling  
A polarization scrambler and associated method for polarization scrambling are provided, wherein light is passed through a retarder whose eigen modes and delay vary with time and which is driven...
7039280 Embedded type optical isolator and method for manufacturing the same  
Optical isolator comprises a ferrule having a through-hole in which an optical fiber is inserted and a groove formed in the ferrule with the optical fiber inserted in the through-hole; and a...
7039278 Single-fiber bi-directional transceiver  
An integrated transceiver for achieving bi-directional communication along a single fiber-optic cable in a fiber-optic network. The transceiver includes an active part for transmit and receive...
7035497 Miniature 1×2 magneto-optic switch  
A magneto-optical switch includes a birefringent crystal that receives a light beam, a half-wave plate pair that receives the light beam from the birefringent crystal, a Faraday rotator that...
7035009 Apparatus and method for controlling polarization in an optical communications medium  
An exemplary polarization controller includes a first optical element having a first optical axis and configured to receive light having a first phase, a second optical element having a second...
7024073 Reflective variable light attenuator  
A reflection-type variable optical attenuator comprises: a main attenuator unit including a first birefringent crystal plate, a Faraday rotational angle varying unit, and a second birefringent...
7023618 Dual-stage optical isolator minimized polarization mode dispersion and simplified fabrication process  
An optical isolator includes a first stage configured to refract a light ray applied in a forward direction into a first ray and a second ray. A second stage rotated 90° with respect to the first...
7009767 Polarization separating/synthesizing element and optical device using it  
A polarized-light separating/combining element is obtained which can suppress deviation in a direction of rays (angular error), reduce beam coupling loss and improve extinction ratio. Size...
6993872 Light control window  
A light control window that includes at least a transparent window substrate and an optical element. The optical element includes at least an optical element main body configured to change the...
6987611 Miniature circulator 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 includes two refraction elements arranged opposite each...
6985652 Optical switching device and optical device  
An optical switching device including a substrate and at least an organic film as a light control part formed on the substrate. Optical switching is performed by applying signal light and control...
6975454 Variable polarization-dependent-loss source  
An optical device including a beam splitter, polarization controller, and beam combiner is described. In some embodiments, the beam splitter and beam combiner are provided in a single element. An...
6965472 Nonreciprocal optical element with independent control of transmission opposite directions  
A nonreciprocal optical element and method for operating it to effect separate control of intensity and phase (or optical path length) of counter propagating beams over a very wide range. The...
6956988 Optical interleaver  
In accordance with an exemplary embodiment of the present invention, an optical device includes a first element which decomposes said optical signal into a first beam and a second beam with the...
6956697 Front-end circulator for an optical device  
The invention relates to an optical circulator for use as a front end for an optical device platform, which requires a pair of like-polarized sub-beams as input. A combined beam of light comprising...
6954307 Four-port PM circulator  
A circulator includes a polarization beam splitter, a first reflector, a first non-reciprocal device, a second non-reciprocal device, and a second reflector. The first reflector is coupled with the...
6950235 Optical isolators and methods of manufacture  
Optical isolators and methods of manufacturing optical isolators are disclosed. The optical isolators are manufactured by directly bonding the parts of the isolators without the use of adhesive or...
6947618 Polarization controller  
Polarization controlling elements equivalent to quarter and half waveplates are constructed from sequences of variable retarder plates having fixed retardation axes. An endless polarization control...
6944363 Miniature magneto-optic fiber optical switch  
An optical switch uses a walk-off crystal together with a Wollaston prism, a Faraday rotator, and a halfwave plate pair and a single collimating lens of one multiple-fiber pigtail for both input...
6927913 Optical signal processing apparatus  
An optical signal processing apparatus has a diffraction grating element, first condenser lens, Faraday rotation elements, polarization beam splitter, λ/2 plate, second condenser lens, third...
6927909 Integrated magneto-optical modulator with optical isolator, method of manufacturing the same and optical communication system using the same  
The integrated magneto-optical modulator with optical isolator of the present invention comprises an optical isolator unit, a magneto-optical modulator unit, an impedance adjuster. The optical...
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