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| Number | Title | Issue Date |
| 8059923 | Systems and methods for minimally-invasive optical-acoustic imaging An imaging guidewire can include one or more optical fibers communicating light along the guidewire. At or near its distal end, one or more blazed or other fiber Bragg gratings (FBGs) directs light to a photoacoustic transducer material that provides ultrasonic imag... | 11/15/2011 |
| 8036499 | Acousto-optic filter Optical waveguides are provided on a substrate, a thin film whose refractive index is optically less than the refractive indices of the optical waveguides is provided on the surface of the substrate, and a surface-acoustic-wave waveguide is arranged on the thin film... | 10/11/2011 |
| 7697795 | Acoustic modulation The present invention relates to the modulation of light traveling along a waveguide, in particular to the acoustic modulation of the light. There is provide a modulator arrangement for acoustically modulating optical radiation. The modulator arrangement has: a wave... | 04/13/2010 |
| 7697794 | Micropulse lidar transmitter based on a low-SBS erbium-doped silica fiber A narrow-linewidth micropulse LIDAR transmitter based on a low-SBS single clad, small-mode-area optical fiber. High narrow-linewidth peak powers are achieved through the use of an erbium doped fiber with an acoustic waveguide. Over 6 μJ per pulse (100 ns pulse widt... | 04/13/2010 |
| 7660492 | Systems and methods for minimally-invasive optical-acoustic imaging An imaging guidewire can include one or more optical fibers communicating light along the guidewire. At or near its distal end, one or more blazed or other fiber Bragg gratings (FBGs) directs light to a photoacoustic transducer material that provides ultrasonic imag... | 02/09/2010 |
| 7463795 | Acousto-optic device The present invention relates to an acousto-optic device capable of extending the frequency band of SAWs being able to be generated by it, the acousto-optic device comprising: a light propagation unit for propagating light; a surface acoustic wave propagation unit c... | 12/09/2008 |
| 7447388 | Systems and methods for minimally-invasive optical-acoustic imaging This document discusses, among other things, an imaging guidewire that includes one or more optical fibers communicating light along the guidewire. At or near its distal end, one or more blazed or other fiber Bragg gratings (FBGs) directs light to a photoacoustic tr... | 11/04/2008 |
| 7430344 | Acousto-optic device and fabrication method of acousto-optic device An acousto-optic device is disclosed which can achieve both of suppression of secular change and prevention of device damage and can maintain a stabilized wavelength selection filtering operation. The acousto-optic device includes a substrate on which a SAW guide fo... | 09/30/2008 |
| 7405859 | Method and apparatus for selecting wavelength A wavelength selecting apparatus includes a wavelength selecting filter and that a monitoring filter are similar acousto-optic tunable filters; a light source that outputs light having a specific wavelength to the monitoring filter; a light receiving unit that detec... | 07/29/2008 |
| 7400829 | Transmission apparatus and path selection method of a transmission apparatus A transmission apparatus that receives an optical signal by selecting any one of a plurality of provided optical signal transmission paths through protection control is configured to include a plurality of optical signal outputting sections that output the optical s... | 07/15/2008 |
| 7366364 | Optical multiplexer An optical multiplexer includes a substrate into which are integrated a polarization rotator and a polarization coupler. The polarization coupler and the polarization rotator are in optical communication with each other. ... | 04/29/2008 |
| 7349632 | Method of wavelength selection control and wavelength variable filter device A method of wavelength selection control is disclosed. The method includes detecting reference RF frequencies by varying the frequency of a RF signal supplied to a reference acousto-optic tunable filter with the reference RF frequencies corresponding to reference wa... | 03/25/2008 |
| 7343056 | Acoustooptic filter An acoustooptic filter 1 having an optical waveguide 3 disposed on an upper surface 2a of an acoustooptic substrate 2, an interdigital electrode 4 which excites a surface wave disposed on the acoustooptic substrate 2,... | 03/11/2008 |
| 7340115 | Optical wavelength tunable filter In an optical wavelength tunable filter (AOTF) using an acousto-optic effect of the present invention, there is provided a single SAW waveguide which propagates a surface acoustic wave generated by an IDT along respective arm portions of an optical waveguide. The SA... | 03/04/2008 |
| 7327909 | Method for tuning a fiber optic component A tunable fiber optic component providing environmental isolation, thermal tuning, and mechanical tuning and a method of tuning a fiber optic component using application of substantially simultaneous varying of temperature and mechanical strain is disclosed. A metho... | 02/05/2008 |
| 7302121 | Optical device and drive voltage supply device The present invention is directed toward an optical device and a drive voltage supply device, which prevent occurrence of a DC drift and enable stable selection of light of desired wavelength without deteriorating a filtering characteristic. The optical device compr... | 11/27/2007 |
| 7302128 | Fiber optic switch A fiber optic switch uses induced periodic variations in a multi-mode optic fiber, to control power loss in the switch and power output. ... | 11/27/2007 |
| 7292740 | Apparatus and method for controlling transmission through a photonic band gap crystal An apparatus (10) and method for dynamic frequency control of a photonic band gap crystal includes an acoustic band gap crystal (12) having a defect site (14), a photonic band gap crystal (20) in the defect site of the acoustic band gap c... | 11/06/2007 |
| 7292755 | Optical resonator formed in a planar optical waveguide with a distributed optical structure An optical apparatus comprises a planar optical waveguide having at least two reflectors. The planar optical waveguide substantially confines in at least one transverse spatial dimension optical signals propagating therein, and the reflectors define an optical reson... | 11/06/2007 |
| 7283705 | Planar focusing grating coupler Provided is a planar focusing grating coupler, comprising: a light waveguide including a cladding layer and a core layer formed on a substrate and maintaining incident laser light in a single mode; and a focusing grating coupler formed to have a predetermined gratin... | 10/16/2007 |
| 7274458 | Thermoplastic film having metallic nanoparticle coating The present invention is directed to an article comprising a thermoplastic polymer film and a discontinuous metallic nanoparticle coating, of an average size less than 100 nm, and the process for preparing the same. The coated film may be further stretched or shrunk... | 09/25/2007 |
| 7269306 | Actuator arrangement for excitation of flexural waves on an optical fiber A system for exciting flexural waves on an optical fiber (102) is provided. The system includes a substrate (114, 118), an actuator (106), and a mechanical optical fiber coupling (104). The actuator is formed of an electromechanical trans... | 09/11/2007 |
| 7256668 | Phase change control devices and circuits for guiding electromagnetic waves employing phase change control devices A circuit for guiding electromagnetic waves includes a substrate for supporting components of the circuit. The circuit includes a control device which includes a first conductive element on the substrate for connection to a first component of the circuit and a secon... | 08/14/2007 |
| 7245803 | Optical waveguide grating coupler An optical waveguide grating coupler for coupling light between a planar waveguide and an optical element such as an optical fiber. The optical waveguide grating coupler includes a grating comprising a plurality of elongate scattering elements. The optical waveguide... | 07/17/2007 |
| 7245789 | Systems and methods for minimally-invasive optical-acoustic imaging This document discusses, among other things, an imaging guidewire that includes one or more optical fibers communicating light along the guidewire. At or near its distal end, one or more blazed or other fiber Bragg gratings (FBGs) directs light to a photoacoustic tr... | 07/17/2007 |
| 7224867 | Holographic spectral filter Method and apparatus are contemplated for receiving from an input, an optical signal in a volume hologram comprising a transfer function that may comprise temporal or spectral information, and spatial transformation information; diffracting the optical signal; and t... | 05/29/2007 |
| 7218798 | Optical deflection element and optical switch An optical deflection element is configured to include a prism electrode provided on an optical waveguide, a first photonic crystal structure provided forward of the prism electrode in a light traveling direction being a position after a light passes through the pri... | 05/15/2007 |
| 7218797 | Acousto-optic device and fabrication method of acousto-optic device An acousto-optic device is disclosed which can achieve both of suppression of secular change and prevention of device damage and can maintain a stabilized wavelength selection filtering operation. The acousto-optic device includes a substrate on which a SAW guide fo... | 05/15/2007 |
| 7215837 | Optical waveguide display systems and methods Optical waveguide systems and methods are described. In one aspect, a display system includes a planar acoustic cavity having a fundamental resonant acoustic mode. The acoustic cavity includes an array of optical waveguides and an array of acoustic transducers. Each... | 05/08/2007 |
| 7215507 | Flow modification for reducing track misregistration in hard disk drives Systems and apparatus are described for modifying fluid flow in a hard disk drive system to reduce cross-track motion. The systems and methods provide advantages because they include at least one flow modification element. In some embodiments, the flow modification ... | 05/08/2007 |
| 7209603 | Acousto-optical device based on phonon-induced polaritonic band gaps The device comprises an optical waveguide and an acoustic wave generating device. The waveguide has an optical band gap and a sharp electronic transition (e.g. an excitonic transition) in the band gap, and the acoustic wave generating device generates acoustic waves... | 04/24/2007 |
| 7209607 | Optical space-switching matrix Optical switch matrix having at least an input matrix port defining at least a row of the matrix, a plurality of output matrix ports defining columns of the matrix, a plurality of switching elements, each one being disposed at the intersection of at least one row an... | 04/24/2007 |
| 7206120 | Dynamic beam splitter outputting a selectable number of beams A dynamic beam splitter including a beam deflector having a plurality of operative regions, the beam deflector being operative to receive a laser beam at a first one of the plurality of operative regions, the laser beam passing through the beam deflector, and to sel... | 04/17/2007 |
| 7197208 | Wavelength tunable light sources and methods of operating the same Wavelength tunable light sources and methods of operating the same are described. In one aspect, a wavelength tunable light source includes a resonant light path, an optical gain medium, an optical grating, a first acousto-optic deflector, and a second acousto-optic... | 03/27/2007 |
| 7190869 | Two-mode photonic crystal fiber and applications thereof A two-mode photonic crystal fiber includes a core of a substantially transparent core material. The core material has a core refractive index and a length, and has a core diameter. The fiber also includes a cladding region surrounding the length of core material. Th... | 03/13/2007 |
| 7187814 | Optical add/drop device A drop-type AOTF is used as a configuration for removing from a through signal an optical signal having the same wavelength as that of an optical signal to be added. To the drop-type AOTF, RF signals are input to always select all of wavelengths, and an RF signal is... | 03/06/2007 |
| 7181094 | Apparatus for controlling acousto-optic tunable filter and method of selecting wavelength A radio-frequency-signal generator generates an RF signal. An optical monitor monitors a first intensity of a reference signal and a second intensity of a drop signal. A reference-frequency determining unit determines, based on the first intensity, a first frequency... | 02/20/2007 |
| 7155105 | Thermal gradient prism for active beam steering A variable optical attenuator (VOA) for use in an optical fiber communication system has a substrate, a thermal gradient prism and a heating element deposited on the prism. Heat is applied to the thermal gradient prism through the heating element. An optical signal ... | 12/26/2006 |
| 7142735 | Acousto-optic tunable filter controller AOTF controller that monitors output power of a plurality of wavelengths of an AOTF and scans the frequency of corresponding RF input signals to an AOTF acoustic transducer and searches for the RF frequency corresponding to each desired wavelength that provides maxi... | 11/28/2006 |
| 7127131 | Wavelength insensitive integrated optic polarization splitter An integrated optic polarization splitter includes a pair of waveguide elements with a first waveguide element having a horizontal orientation and a second waveguide element having a vertical orientation formed from a plurality of waveguide core layers. The first an... | 10/24/2006 |
