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| Number | Title | Issue Date |
| 8189966 | QKD arrangement A QKD arrangement with a photon source generating entangled idler and signal photons, with two measuring units, one of which receiving the idler photons and the other one receiving the signal photons, and each including an optical module with photon channels, wherei... | 05/29/2012 |
| 8164831 | Optical depolarizers and DGD generators based on optical delay Techniques and devices for depolarizing light and producing a variable differential group delays in optical signals. In one implementation, an input optical beam is split into first and second beams with orthogonal polarizations. One or two optical reflectors are th... | 04/24/2012 |
| 8160405 | Optical integrated circuit Consistent with the present disclosure, a non-adiabatic polarization rotator is provided that can rotate the polarization of an incoming over a relatively short length. Light is supplied to the polarization rotator via a polarizer, which insures that the optical inp... | 04/17/2012 |
| 8150219 | Waveguide-type optical interferometer In an optical interferometer, polarization dependence attributable to the optical path difference has conventionally been eliminated by inserting a half-wave plate at the center of the interferometer. However, light induced by polarization coupling produced in direc... | 04/03/2012 |
| 8131120 | Planar polarization splitter An apparatus comprising a planar optical structure that includes an input coupler, first and second planar waveguides and an output coupler, all on a planar substrate. The input coupler is configured to divide an incoming light into two input light beams. Each of th... | 03/06/2012 |
| 8115998 | In-line optical isolator In an in-line optical isolator, a first polarization separation element 91, a Faraday rotator 6 made of a BIG film, and a second polarization separation element 92 are placed in that order. The isolator further includes a first optical fiber col... | 02/14/2012 |
| 8005322 | Polarization-independent optical isolator It is provided a polarization-independent optical isolator without depending on the polarized wave of the light being input to the waveguide-type optical isolator, in particular, it is able to completely isolate the propagating light of the backward direction. ... | 08/23/2011 |
| 7983515 | Polarization maintaining optical fiber polarizer A novel in-fiber polarizer is provided that is implemented in an optical fiber structure based on a polarization maintaining (“PM”) optical fiber, and that is configured to impart a predetermined desired polarization to a light signal transmission of a predeterm... | 07/19/2011 |
| 7941012 | Phase-engineered fibers for use in generating cylindrical vector beams A phase-engineered fiber is described for generating a cylindrically polarized beam. The fiber includes a core region, a ring region surrounding the core region, and an outer cladding region surrounding the ring region. The fiber regions are configured to cause the ... | 05/10/2011 |
| 7907798 | Systems and methods for polarization mode dispersion mitigation In one exemplary embodiment, a method comprises transmitting an optical signal via the optical line, measuring a relative change in spectral intensity of the optical signal near a clock frequency (or half of that frequency) while varying a polarization of the optica... | 03/15/2011 |
| 7840100 | Devices for dispersion compensation, beam displacement, and optical switching A method of laterally displacing at least a component of a light beam, the method comprising: a) directing the beam to enter a block of birefringent material at a first location, and at least the component of the beam to pass through the block on a first path to an ... | 11/23/2010 |
| 7831114 | Tunable dispersion compensator with minimum differential group delay In a method and system for providing dispersion compensation in an optical system, there is coupled into the optical system at least one pathway into which there is connected a tunable chirped fiber Bragg grating, each such grating providing a respective tunable amo... | 11/09/2010 |
| 7822298 | Polarization component processor, method of processing polarization components and integrated photonic circuit employing the same An apparatus and a method by which polarization components may be processed separately, for example, to enable a polarization beam splitter (PBS) or a switch. In one embodiment, the apparatus includes: first and second Mach-Zehnder interferometers, each Mach-Zehnder... | 10/26/2010 |
| 7787715 | TE-TM mode converter A TE-TM mode converter is provided which is capable of performing a TE-TM conversion in a wide bandwidth. In a TE-TM mode converter using an electrooptic effect, a waveguide is formed on a substrate using lithium tantalate having a birefringence of about 0.0005 or l... | 08/31/2010 |
| 7787716 | Polarization mode dispersion compensator, polarization mode dispersion compensating method, and its application to optical communication system The present invention provides a polarization mode dispersion compensator comprising: a compensating portion which includes a first polarization controller which performs polarization conversion on light propagating along an optical transmission line and a DGD (Diff... | 08/31/2010 |
| 7783139 | Polarized light mode converter The present invention provides a polarized light mode converter which can be provided within a two-dimensional photonic crystal or can be smoothly connected to a two-dimensional photonic crystal. In a two-dimensional photonic crystal made of a slab-like main body pr... | 08/24/2010 |
| 7778498 | Systems and techniques for generating cylindrical vector beams A technique is described for generating a cylindrically polarized beam, e.g., a radially or azimuthally polarized beam. An input optical fiber is provided that supports signal propagation in a fundamental LP01 mode. A mode converter device converts the fu... | 08/17/2010 |
| 7773834 | Multilayer polarizing fibers and polarizers using same A polarizing film is made of multilayer polarizing fibers embedded within a matrix. The fibers are formed with layers of at least a first and a second polymer material. Layers of the first polymer material are disposed between layers of the second polymer material. ... | 08/10/2010 |
| 7769250 | Electrooptic probe for measuring temperature and electromagnetic field A device for measuring an electromagnetic field and the temperature in an analysis zone includes a light source for sending a light beam into a polarization-maintaining optical fiber. The light beam is directed along one axis of the fiber. An anisotropic electroopti... | 08/03/2010 |
| 7724987 | Method and apparatus for dynamic polarization control A dynamic polarization controller (“DPC”) that and method of dynamic polarization control useful in optical networks is disclosed. The DPC of the present invention has a polymeric optical waveguide formed on a substrate, such as a silicon wafer. An intermediate ... | 05/25/2010 |
| 7715664 | High power optical isolator A high power optical isolator is able to transfer excess heat to a heat sink, reduce the effect of scattered and reflected light, and be coupled to standard thin optical fibers. ... | 05/11/2010 |
| 7711216 | Devices and methods for spatial filtering Methods and devices for polarizing light in a proton exchange polarizer where cross-coupling of unwanted modes of light is reduced with an integrated spatial filter. An optically transmissive substrate such as a substrate created from LiNbO3 or LiTaO... | 05/04/2010 |
| 7693357 | Methods and systems for eliminating deleterious polarization effects in an optical fiber dispersion compensation module The present invention provides methods and systems for mitigating polarization changes associated with an optical communication signal caused by mechanical disturbances to an optical fiber dispersion compensation module of an optical communication network. The metho... | 04/06/2010 |
| 7680362 | CMOS-compatible polarization-diverse tunable optical bandpass filter According to one embodiment, an optical filter has a polarization rotator and two instances of an optical bandpass filter (OBPF). The first instance of the OBPF processes a TE-polarized component of an optical input signal to produce a first filtered signal. The pol... | 03/16/2010 |
| 7668410 | Production method for polarization inversion unit It is provided a novel method of producing polarization inversion parts by electric field polling process wherein the polarization inversion part extends to a deeper point from the surface of a substrate. The polarization inversion part is produced by electric field... | 02/23/2010 |
| 7664346 | Waveguide-type broadband optical isolator A waveguide-type broadband optical isolator according to the present invention, comprising: a reciprocal phase shifter which makes a phase difference 3π/2 between a first light wave propagating through a first waveguide and a second light wave propagating through a... | 02/16/2010 |
| 7653268 | Substrate guided relay with polarization rotating apparatus A substrate guided relay (600) includes an input coupler (601), an output coupler (603), and an optical substrate (602). Light is delivered from the input coupler (601) to the optical substrate (602), and then to the output ... | 01/26/2010 |
| 7653269 | Quasi PM fused coupler devices and methods for forming the same A quasi-PM fused optical coupler device and method for forming the same. The optical coupler device includes a first polarization maintaining (PM) input section providing a first PM input for the fused optical coupler device for receiving a linearly polarized signal... | 01/26/2010 |
| 7609915 | Apparatus and method for a waveguide-based optical polarizer/isolator The present invention provides an apparatus for a one-way waveguide and/or a circular polarizer that includes a waveguide having a height, a width, a length and a wave propagation direction. A first wall of the waveguide has a first slanted groove. A second wall opp... | 10/27/2009 |
| 7574073 | Optical devices with integral isolators An isolator assembly, for use internally within a multi-port optical switch, and which operates on a preselected number of input port channels. The assembly incorporates a sequence of a birefringent crystal with a half wave plate on part of its output face acting as... | 08/11/2009 |
| 7565040 | Optical device using variable polarization element An optical device using an electro-optical element is of great utility value to industry, owing to its fast responsiveness and the like. Prior art has problems such as high cost due to a large number of parts, large device size, and high drive voltage, and it has be... | 07/21/2009 |
| 7565041 | Symmetric optical circuit with integrated polarization rotator The present invention is directed to an on-chip symmetric optical circuit having one or more integrally fabricated polarization rotators forming a monolithic, solid state polarization independent symmetric circuit. The symmetric optical circuit has at least one inte... | 07/21/2009 |
| 7522785 | Measurements of polarization-dependent loss (PDL) and degree of polarization (DOP) using optical polarization controllers Devices and techniques that use a polarization controller and a feedback control to the polarization controller to systematically control the polarization of light output from the polarization controller in measuring the polarization dependent loss (PDL) of an optic... | 04/21/2009 |
| 7515780 | System and method for fabricating an optical isolator There is provided a system and method for fabricating an optical isolator. More specifically, there is provided a fiber optical isolator comprising a first isolator stage comprising a Faraday rotator configured to adjust the polarity of a light beam, and a heat sink... | 04/07/2009 |
| 7505640 | Integrated optics polarization beam splitter using form birefringence A method for separating the orthogonal polarization components of an incident optical signal into two spatially separated output ports is described. The method comprises a Mach-Zehnder interferometer where one of the two branches has a section of waveguide that exhi... | 03/17/2009 |
| 7492977 | All-fiber current sensor Embodiments of the present invention provide a current sensing device. The current sensing device includes, inter alia, a three-by-three (3×3) optical coupler made of polarization-maintaining (PM) fibers and thus being a PM fiber coupler; a light source and at leas... | 02/17/2009 |
| 7486845 | Waveguide polarization beam splitters and method of fabricating a waveguide wire-grid polarization beam splitter A method in effectuating the redirection of light which is propagated within a waveguide, and which eliminates the necessity for a bending of the waveguide, or the drawbacks encountered in directional changes in propagated light involving the need for sharp curves o... | 02/03/2009 |
| 7474813 | Connector mountable asymmetric free space optical isolators A compact optical isolator includes a polarizer, a Faraday rotator, and an analyzer that are arranged in series. A magnet is also included to provide a magnetic field to the Faraday rotator. The outer edges of the polarizer, Faraday rotator, and analyzer are prefera... | 01/06/2009 |
| 7466878 | Integrated polarization controllers with nano-electromechanical dielectric pertubation A polarization controller includes a phase retarder having a rotation about an {1,0,0} axis that receives an optical signal from a waveguide structure. At least one nanoelectromechanical dielectric perturber produces ±45° birefringent axes by placing the at least ... | 12/16/2008 |
| 7454092 | Systems and methods for polarization mode dispersion mitigation In one exemplary embodiment, a method comprises transmitting an optical signal via the optical line, measuring a relative change in spectral intensity of the optical signal near a clock frequency (or half of that frequency) while varying a polarization of the optica... | 11/18/2008 |
