Matches 151 - 200 out of 325 < 1 2 3 4 5 6 7 >
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6236506 Reflection-type optical circulation 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...
6226115 Optical circulator or switch having a birefringent wedge positioned between faraday rotators  
An optical device, such an as optical circulator or switch, which includes a birefringent tapered element, such as a birefringent wedge, positioned between first and second Faraday rotators. Light...
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...
6190016 Irradiation device for an alignment layer of a liquid crystal cell element  
Uniform irradiation of an entire region to be irradiated with polarized light for optical alignment of a liquid crystal cell element using a small polarization element is achieved by light, which...
6175668 Wideband polarization splitter, combiner, isolator and controller  
A wideband polarization splitter and combiner is fabricated using either fiber coupler technology or planar coupler technology. The device splits or combines wideband light signals without losing a...
6154581 Multiple port, fiber optic circulator  
A reflective circulator includes a birefringent splitting and combining element, a non-reciprocal polarization rotator, and birefringent translating element. Some embodiments of the circulator...
6128423 Reflection type magneto-optic sensor  
A reflection type magneto-optic sensor includes a light path assembly, a lens, a polarizer, a bismuth-substituted rare earth iron garnet single crystal film (BIG film), a non-magnetic garnet...
6111695 Optical circulator  
An optical circulator having reduced size and low polarization mode dispersion is disclosed. A transparent optical circulator comprises a first birefringent crystal, a first pair of Faraday...
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...
6101026 Reversible amplifier for optical networks  
A reversible optical isolator and optical amplifier based on the optical isolator. The reversible isolator is constructed from a Faraday rotator having a magnetic field direction that is determined...
6091543 Apparatus for providing non-reciprocal termination of parallel like polarization modes  
The present invention teaches a methodology for producing parallel beams having like polarizations or parallel like polarization modes (PLPM) without utilizing 90 degree polarization interchangers,...
6075647 Optical spectrum analyzer having tunable interference filter  
An optical spectrum analyzer includes a polarization modifier that eliminates polarization-dependent wavelength spreading, enabling the analyzer to have high signal selectivity and high measurement...
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...
6064522 Miniature mass producible non-reciprocal devices  
An n by m array of lenses layer where n is greater than 1 and m is greater than 1 is disposed on a combination of layers comprised of a first walk-off layer, a first non-reciprocal rotator layer, a...
6061167 Optical isolator  
6055102 Optical isolator having surface mountable open core  
An optical isolator (1) includes an isolator element (4) having an optical axis and a Faraday rotator (6) and at least one polarizer (7a, 7b) and a magnet (2). The magnet (2) is an open-core magnet...
6055101 Isolator assembly and method of making  
An isolator assembly eliminates optical feedback or return beams in multiple stages. The isolator assembly employs passive optical components, including birefringent walk-off plates and...
6052214 System and method for producing an enhanced image  
An imaging system and method directs white light to a reflecting polarizing surface at an angle of incidence substantially equal to the Brewster angle to help maximize or greatly increase the...
6049427 Optical device arrangements utilizing simultaneous orthogonal walkoff elements  
Optical devices are described. These devices incorporate a walk-off arrangement along the device length configured for simultaneously moving orthogonal polarization components of a first light...
6049425 Multiple-stage optical isolator  
The present multiple-stage optical isolator has low polarization-dependency and low polarization-mode dispersion but does not require a long time for the assembly. It is constructed of a first unit...
6043933 Split optical element and a low cost fabrication approach  
A method of fabricating split optical elements includes fixing a number of optical members in a side-by-side arrangement such that abutting optical members have different optical characteristics...
6028702 Optical isolator  
The present invention relates to an optical isolator having a plurality of Faraday rotators with a structure, which allows an accurate and easy assembly. The optical isolator relating to the...
6014254 Optical device for splitting an input beam into two orthogonal polarization states  
An optical fiber having a small numerical aperture (NA) is optically coupled with a short birefringent crystal to provide a polarization beam splitter. This arrangement obviates the use of a GRIN...
6011649 Optical assembly and method for high performance coupling  
An optical assembly, such as a circulator, for selectively coupling first and third input/output windows at a forward end with a second input/output window at a rearward end includes a first group...
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...
5999315 Polarizer and a production method thereof and an optical isolator  
Plural layers of metallic particle layers in which metallic particles having morphological anisotropy are dispersed and dielectric layers are alternately stacked on at least one pricipal surface of...
5999313 Optical device having function of optical circulator  
An optical device having a function of an optical circulator of which forward losses are uniformly small while reverse losses are uniformly great. The optical device applicable to be used as an...
5982539 Optical device  
Light input from a first optical fiber is split up into two orthogonally-polarized beams by a polarizing prism. Their polarization planes are rotated by a 45-degree Faraday rotator. The beams are...
5978135 Article comprising a variable optical attenuator  
In an arrangement substantially like an optical isolator, appropriate choice of the composition of the magneto-optic element can result in a variable optical attenuator. The composition is selected...
5973832 High performance optical circulators  
As will be described in more detail hereinafter, there are disclosed herein high performance optical circulators and an associated method. The improvement in these circulators comprises an...
5936768 Optical passive device for an optical fiber amplifier and the optical amplifier  
An optical device of the invention having a first doubly refracting crystal plate of parallel plate type whose crystal optical axis is inclined in relation to the optical axis of an incident light,...
5930028 Split reciprocal polarization switch  
A split reciprocal polarization switch (SRPS) for use in constructing high performance switching devices used in fiber optics. The SRPS allows selective changes in the polarization of one or the...
5930039 Optical circulator  
An improved optical circulator transfers light from a first optical port to a second optical port, and from the second port to a third port. The circulator has reciprocal and non-reciprocal...
5930038 Optical isolator with polarization dispersion and differential transverse deflection correction  
An optical isolator includes an optical isolator unit including a main polarization discriminator in concatenation with a Faraday rotator, and an auxiliary polarization discriminator disposed in...
5912766 Optical isolator  
An optical isolator (2) comprising two polariser means (10,12), two input/output ports (4,6) formed respectively on the polariser means (10,12), and optical rotator means (14,18) disposed between...
5867314 Structure of optical passive device and assembling method therefor  
A hollow magnetic member includes a plurality of separate magnetic pieces. A parting surface between such pieces is defined by a plane parallel to or defining an angle of not more than forty-five...
5835270 Optical isolator device  
An optical isolator device is provided which is free from polarization dispersion. The optical isolator device presents an optical path which is equidistant for both an ordinary ray and an...
5818626 Method and apparatus for optical isolation  
An optical isolator and circular polarizer are used in combination to optically isolate specular and diffuse reflections which result when a forward traveling radiation beam encounters an optical...
5808793 Low-cost compact optical isolators  
An optical isolator unit is aligned, assembled, and subsequently diced into smaller isolator chips for placement in a micro-optical bench, along with input and an output fiber coupling ball lenses....
5790299 Optical isolator employing a cadmium-zinc-tellurium composition  
A Faraday rotator for rotating a plane of polarization of polarized light, said Faraday rotator having an optical element comprising a rod which is comprised of an optically transmitting...
5774264 Polarization independent optical isolator  
A polarization-independent optical isolator having a structure in which polarization dispersion is virtually eliminated by selecting the thickness and optical axis orientations of birefringent...
5771120 Optical apparatus with combined polarization functions  
Apparatus performs polarization dependent functions although the apparatus is polarization independent with respect to the outside world. The apparatus produces parallel beams with like...
5768005 Multi-stage optical isolator  
This invention relates to a reflective optical isolating device having at least two stages. In one embodiment a polarization independent optical isolating device has an input/output end and a...
5760946 Optical isolator, faraday rotator suitable for use in the same, and laser diode module incorporating the same  
An optical isolator has a low-profile construction. Two rod-like permanent magnets are on two sides of a Faraday element in parallel to an optical axis. The two permanent magnets are sandwiched and...
5757538 Optical isolator  
An optical isolator, which is small in size, light in weight and simple in manufacture, includes a Faraday element (1). The optical isolator also includes polarization films (2a, 2b) formed on a...
5739943 Polarization control unit  
Light beams emitted from an optical fiber are converted into parallel light beams by a lens, and then allowed to pass through a Faraday device, followed by being converged to an incident end of the...
5726801 Reduced optical isolator module for a miniaturized laser diode assembly  
The present invention provides for a reduced isolator assembly having only two elements for a linearly polarized light source. The first element may be a birefringent crystal or a linear polarizer,...
5715080 Compact uniform field Faraday isolator  
A compact Faraday rotator and isolator featuring a uniform magnetic field for isolating a light source from light which is directed back towards the light source. The isolator comprises a Faraday...
5712728 Methods and devices incorporating wideband faraday rotation  
Methods and devices incorporating wideband Faraday Rotation in which light having mixed wavelengths is dispensed according to wavelength and passed through a magnetic optical rotator along pathways...
5691845 Optical isolator, optical isolator with fiber and method for making the same  
In an optical isolator including first and second birefringent plates whose optical axes are angularly different and a Faraday rotator inserted therebetween having a Faraday rotation angle of θ f...
Matches 151 - 200 out of 325 < 1 2 3 4 5 6 7 >