Matches 201 - 250 out of 325 < 1 2 3 4 5 6 7 >
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5689360 Polarization independent optical isolator  
A polarization independent optical isolator for transmitting a signal ray in a forward direction and suppressing backward transmission comprises: a first and second optical isolation unit for...
5640516 Faraday rotator  
A Faraday rotator which comprises, in combination, a garnet material of an atomic ratio composition Bi x P y Q 3 -x-y Fe 5 -w M w O 12 in which P is one or more elements chosen from among Y,...
5638207 Flare-prevention optical system, flare-prevention method, and flying height tester  
An optical system is provided in which flare is prevented and, when the light reflected from a reflection component is modulated by a photoelastic phenomenon, the effect of the modulation on the...
5625490 Optical coupler  
An optical coupler is disclosed which utilizes a pair of polarization selective filters to multiplex a message signal (of perhaps random polarization) with a pair of polarized pump signals onto a...
5612813 Optical isolator, circulator, switch or the like, including a faraday rotator  
Optical isolator, circulator, switch or the like, including a Faraday rotator to which a magnetic field is applied which is oriented along the direction of propagation of light and which is...
5602673 Optical isolator without polarization mode dispersion  
An optical isolator utilizes a pair of polarization selective elements, as for example birefringent wedges, and all integral Faraday rotator aligned therewith to perform optical signal isolation...
5583690 Faraday microscope with magneto-optical indicator as terminating element of objective lens  
In a Faraday microscope for examining specimens with stray magnetic fields in a reflected light beam path with a magnetic indicator film arranged in front of the specimen, the influence of the...
5574595 Optical isolator  
A polarization independent optical isolator for use in optical communication systems is provided. This optical isolator functions to provide dual-way optical isolation wherein an input optical...
5566017 Material for magneto-optical element and faraday rotator using the same  
Disclosed is a material for a magneto-optical element, which is made of magnetic garnet single crystals being wide in a band width in a 1310 nm band and thereby being capable of coping with the...
5559633 Optical isolator with reduced relative walk-off  
An optical isolator comprises a non-reciprocal rotator disposed between a pair of birefringent wedges, an input wedge and an output wedge. In order to reduce walk-off between the ordinary and...
5557692 Optical isolator with low polarization mode dispersion  
The present invention provides for a compensating element in the form of a birefringent plate in an optical isolator which uses a first GRIN lens to collimate the light signal from an input optical...
5546219 Optical circuit and light transmission system and method using the same  
In the forward direction, the light from an input fiber is polarized and separated in a polarized light separating and combining element, the separated polarized light is rotated by a polarized...
5539574 Optical isolator with fabry-perot ripple reduction  
An optical isolator obtains reduced ripple due to Fabry-Perot reflections by using a polarization mode dispersion compensation element with first and second antireflection coatings designed to...
5535046 Faraday rotator  
A Faraday rotator in which a portion of a rare-earth iron garnet single crystal film is exposed to a localized magnetic field to control hysteresis. In one embodiment, the field is applied by a...
5528415 Compact enhanced performance optical isolator using a faraday rotator  
An optical isolator is disclosed that is particularly useful in the visible, infrared, and near-infrared portions of the electromagnetic spectrum. The rotator portion of the isolator produces a...
5519467 Optical isolator device capable of preventing optical axis from inclining by deformation of adhesive  
An optical isolator device comprises a magnet having a rectangular channel and a rectangular optical isolator element fitted in the channel and fixed to the magnet by adhesive filled up in a gap...
5499132 Optical passive components  
An object of the present invention is to provide an optical passive component having a polarization-independent optical isolator for constituting an optical fiber amplifier and exhibiting an...
5479290 Faraday's rotator and optical isolator  
A Faraday's rotator comprises a magnetic crystal which has a composition represented by the following compositional formula: (Tb 1 -(a+b+c+d) Ln 1 a Ln 2 b Bi c M 1 d ) 3 (Fe 1 -e M 2 e ) 5 O...
5473465 Optical rotator and rotation-angle-variable half-waveplate rotator  
The device of the present invention for an optical rotator and a half-waveplate rotator comprises a retarder or polarization modulator interposed between two crossed or parallel quarter-wave...
5471340 Reflective optical non-reciprocal devices  
In order to reduce the number of components and avoid relatively long optical lengths, a non-reciprocal device such as a circulator comprises a plurality of ports at one end of the device, a mirror...
5463316 Magnetooptic sensor head  
A reflection type magnetooptic sensor head is disclosed. The respective structural elements are aligned following a light source in the order of a light inputting/outputting path, polarizer,...
5452122 Element for optical isolator and optical isolator employing the same, together with semiconductor laser module employing the optical isolator element  
An element for an optical isolator which is formed by alternately bonding together at least one flat plate-shaped Faraday rotator and two or more flat plate-shaped polarizers, the optical isolator...
5446578 Polarization preserving optical isolator  
At least one non-reciprocal rotation element is interposed between two adjacent walk off crystal members to form an optical isolator. Light in the forward direction is separated into two rays of...
5428477 Optical isolator operating independent of polarization of an incident beam  
A polarization-independent optical isolator comprises three Faraday rotators and four birefringent elements. An optical arrangement of these elements is determined on the basis of the appropriate...
5420714 Device for beam division  
A device is provided for division of a light beam into two sub-beams. A polarization beam splitter is provided having a polarizing layer which, dependent upon polarization direction, resolves an...
5408491 Optical isolator  
An optical isolator comprising first through fourth plate-like birefringent substances. Each plate-like birefringent substance receives and transmits incident light, and has a corresponding optical...
5408354 Optical Isolator  
An optical isolator according to the invention comprises a first birefringent element for separating an incident light beam into two light beams that are vertical to each other in the polarization...
5408545 Depolarizer for fiber optic applications and method using same  
A technique for causing the distribution of the state of polarization of an optical signal carried in a single-mode optical fiber to be substantially diversified over a time interval. When such a...
5400418 Polarization independent all-fiber optical circulator  
There is provided an optical circulator (16) for bidirectional communication on a fiber optic communication transmission system. Polarization preserving single-mode fiber lengths (26), (28) connect...
5375009 Optical isolator device having a wider cutoff wavelength band for a return light beam  
In an optical isolator device comprising a plurality of optical isolator elements each of which comprises a pair of polarizers and a magneto-optical element disposed between said polarizers, the...
5345329 Polarization-independent optical isolator  
An optical isolator comprises two birefringent plates one of which separates two light components whose planes of polarization are perpendicular to each other to make the two light components...
5341235 Optical isolator and method for preparing same  
An optical isolator comprises a polarizer, a Faraday rotator, an analyzer and a magnet for applying a magnetic field to the Faraday rotator wherein the polarizer is incorporated into a first metal...
5319483 Polarization independent low cross-talk optical circulator  
There is provided an optical circulator (16) for bidirectional communication on a fiber optic communication transmission system. A reflection rhomb (17) includes a polarizing thin film (26) and an...
5315431 Optical isolator  
A non-reciprocal unit and a parallel-surfaced flat birefringent plate are provided between incident side and outgoing side fiber collimators. The non-reciprocal unit is formed by disposing two...
5305137 Optical isolator and method for fabricating the same  
A polarizer, a Faraday rotator and an analyzer are fixed by fused glass applied on an outer periphery of the polarizer to be contacted with the Faraday rotator and on an outer periphery of the...
5283846 Optical isolator, optical circuit, and rare-earth-doped fiber optical amplifier  
In a polarization dependency type optical isolator comprising wedgelike polarizing prisms 3 and 5 and a Faraday rotator 4, the mode field diameters of an input side fiber 1 and an output side fiber...
5272560 Variable spectral width multiple pass optical noise source  
An apparatus for creating an optical noise of a predetermined bandwidth that uses an optical amplifier which amplifies optical noise components and produces unpolarized optical noise by spontaneous...
5267077 Spherical multicomponent optical isolator  
A spherical multicomponent optical isolator having a first spherical segment lensing region, including a base, a second spherical segment lensing region, including a base, a first polarizer...
5267078 Optical isolator  
An optical isolator comprising an optical isolator unit having a structure depending on a plane of polarization of incident light, a first optical system for splitting the incident light into two...
5262892 Optical isolator  
In an optical isolator, first, second and third birefringent crystals shaped in a flat plate are arranged in order in a forward direction in which a light beam advances and formed in ratios 1:1:1...
5258869 Xerographic laser light modulation with built-in light leveling using optical circulators  
An optical system in which optical circulators with polarization plates are used for light modulation of plane polarized light waves. The light modulation is used for black and white printing, grey...
5244713 Optical film  
An optical film having high optical uniformity is disclosed, including a thermoplastic resin film having no periodic thickness variation of sine waveform having a pitch of 50 mm or less and a...
5237445 Optical isolator  
An optical isolator having a combination of rutile plates or other birefringent crystals and Faraday elements. This optical isolator includes, arranged in the stated order along an optical axis, a...
5235263 Method and apparatus for correcting hysteresis synchronous motor hunting  
A method and apparatus for accurately controlling a hysteresis synchronous motor velocity eliminate low frequency hunting, which is characteristic of the motor. A nominal input phase current is...
5212586 Optical circulator having a simplified construction  
An optical circulator which includes a first birefringent plate for receiving an incident beam of light from a first port, a Faraday rotator, a polarization transforming device, and a second...
5212743 Automatic polarization controller having broadband, reset-free operation  
Wide optical bandwidth and broad wavelength tuning range are achieved in a reset-free, optical, automatic polarization controller by combining three controllable fractional wave elements in cascade...
5204771 Optical circulator  
The optical circulator according to the present invention comprises three birefringent crystal plates 22, 23, and 24; reciprocal and non-reciprocal rotators 25 of the first group inserted between...
H001155 Optical isolator with improved stabiity  
An optical isolator is disclosed which comprises a Faraday rotator disposed between a pair of polarization selective elements (e.g., linear polarizers, birefringent wedges, birefringent plates,...
5161049 Optical isolator and method for preparing same  
An optical isolator according to the present invention comprises a first polarizer, a Faraday rotator and a second polarizer which are adhered to one another in this order and held in a cylindrical...
5146361 Apparatus comprising a magneto-optic isolator utilizing a garnet layer  
Apparatus according to the invention comprises a magneto-optic isolator. The isolator comprises a magneto-optic member that comprises a single crystal substrate and a single crystal garnet layer on...
Matches 201 - 250 out of 325 < 1 2 3 4 5 6 7 >