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| Number | Title | Issue Date |
| 8150223 | Thermal tuning of an optical device Embodiments of an optical device, an array of optical devices, and a technique for fabricating the optical device or the array are described. This optical device is implemented on a substrate (such as silicon), and includes a thermally tunable optical waveguide with... | 04/03/2012 |
| 7953307 | Optical waveguide having bistable transmission states suitable for optical logic circuits An optical circuit comprises a bistable optical waveguide having first and second transmission states, and is more transmissive to light of a given wavelength in the second state than in the first state. First and second light sources emit light of first and second ... | 05/31/2011 |
| 7844149 | Humidity tolerant electro-optic device The invention relates to an electro-optic modulator structure containing an additional set of bias electrodes buried within the device for applying bias to set the operating point. Thus the RF electrodes used to modulate incoming optical signals can be operated with... | 11/30/2010 |
| 7826700 | In-line light sensor The sensor includes an optical waveguide defined in a light-transmitting medium. The waveguide includes a sensing portion and an non-sensing portion. The light-transmitting medium included in the sensing portion has defects that provide the light-transmitting medium... | 11/02/2010 |
| 7783145 | Electrode having nanofilaments An optical device includes optical layer and an electrode configured to reduce eddy currents. The electrode includes an electrically conductive base portion and a plurality of nanofilaments in connection with the electrically conductive base portion. The nanofilamen... | 08/24/2010 |
| 7684666 | Method and apparatus for tuning an optical delay line The present invention is a method and an apparatus for tuning an optical delay line. In one embodiment, an optical delay line includes at least one ring resonator in which light is guided or is confined and at least one heater positioned laterally from the ring reso... | 03/23/2010 |
| 7672553 | High speed semiconductor optical modulator The present invention provides an optical waveguide modulator. In one embodiment, the optical waveguide modulator includes a semiconductor planar optical waveguide core and doped semiconductor connecting paths located adjacent opposite sides of the core and capable ... | 03/02/2010 |
| 7639913 | Optical waveguide element An optical waveguide element includes: an optical waveguide including an organic non-linear optical material; a first electrode arranged on one surface side of the optical waveguide; a second electrode arranged on another surface side of the optical waveguide; a pro... | 12/29/2009 |
| 7627213 | Optical modulator and transmitter To reduce wavelength chirp and produce multi-valued signal light that can be readily demodulated on a receiver side, a Mach-Zehnder type optical modulator includes an incident waveguide that branches input light, a pair of optical waveguides that respectively transm... | 12/01/2009 |
| 7539378 | Optical waveguide device and semiconductor device In order to make it possible to suppress the influence of reflected light on a connection interface easily and with certainty, an optical waveguide device includes a first optical waveguide (1), a second optical waveguide (2) formed from a material or ... | 05/26/2009 |
| 7529447 | Optical waveguide devices The present invention provides an optical waveguide device having a configuration such that the optical waveguide is folded back on an end area of the optical waveguide substrate to widen the modulation band. The optical waveguide device 1A includes a substra... | 05/05/2009 |
| 7522791 | Method for fabricating polarization reversal structure and reversal structure When a domain inversion part is produced by means of electric field polling process, damage in the vicinity of the forward end of a comb electrode and deviation of width of each domain inversion part are to be reduced. A polarization domain inversion structure has p... | 04/21/2009 |
| 7519250 | Optical switches Optical switches are described herein. In one embodiment, an exemplary optical switch includes, but is not limited to, a first waveguide, a second waveguide across with the first waveguide in an angle to form an intersection, and a pair of electrodes placed within a... | 04/14/2009 |
| 7515794 | Periodically poled element having a suppressing structure for the domain spreading A periodically poled element comprises a ferroelectric substrate having a top surface, a bottom surface, a top electrode structure including at least one conductor positioned on the top surface, and a suppressing structure including at least one insulator positioned... | 04/07/2009 |
| 7515793 | Waveguide photodetector The present invention is a waveguide photodetector. In one embodiment, the waveguide photodetector includes a waveguide layer where light is guided or is confined and a detection layer formed on the waveguide layer where guided light is detected. Each of the wavegui... | 04/07/2009 |
| 7509006 | Optical device An optical device wherein an optical waveguide is formed on a dielectric substrate, the optical device includes an input part and an output part where the optical waveguide and corresponding optical fibers are connected. A stress layer is provided for at least one o... | 03/24/2009 |
| 7489842 | Attachment-type optical coupler apparatuses Optical couplers having attachment features are disclosed. A typical coupler according to the present invention couples an optical signal from an optical fiber to a channel waveguide by overlapping the cores of the optical fiber and channel waveguide along a portion... | 02/10/2009 |
| 7454104 | Optical module An optical module has at least two optical elements mounted in parallel with each other. The module also has a first electrode pad which is formed between the paralleled optical elements and grounded to a ground potential and a second electrode pad which is arranged... | 11/18/2008 |
| 7440643 | Variable light controlling device and variable light controlling method A variable light controlling device comprising a substrate, an optical waveguide disposed on the substrate, a first heater and a second heater to change the optical waveguide's temperature is fabricated. And a total amount of the power supplied to the first and the ... | 10/21/2008 |
| 7433550 | Optical modulator and control method therefor A Mach-Zehnder optical modulator capable of feed-back compensating a change due to an optical coupling loss, and the characteristic change peculiar to functional devices, and a control method therefore, are provided. A control method for a semiconductor Mach-Zehnder... | 10/07/2008 |
| 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. Preventing damage to the facet may include expanding a mode area of t... | 10/07/2008 |
| 7426326 | Low loss bridge electrode with rounded corners for electro-optic modulators An electro-optic modulator having a substrate, one or more optical waveguides, at least one active electrode formed on the substrate and aligned over the optical waveguide, the active electrode operating to induce a refractive index change in the optical waveguide. ... | 09/16/2008 |
| 7424188 | Optical module and mounting deviation compensation method for optical waveguide part The optical module includes a first optical waveguide part including a first waveguide core, a second optical waveguide part including a second waveguide core and provided such that the second waveguide core and the first waveguide core are positioned partially clos... | 09/09/2008 |
| 7423254 | High responsivity high bandwidth metal-semiconductor-metal optoelectronic device An optical device for sensing an incident optical wave within a wavelength range includes a first array and a second array of electrodes superposed on a substrate, and a sensor connected to the contacts. The arrays are interdigitated. Each array includes its own par... | 09/09/2008 |
| 7418173 | Waveguide type optical control element and process for its fabrication A waveguide type optical control element which has an optical waveguide made of an insulating material having an electro-optic effect or a thermo-optic effect, and a control electrode provided in contact with or proximity to the optical waveguide; the optical wavegu... | 08/26/2008 |
| 7406226 | Circular grating resonator structure with integrated electro-optical modulation An optical structure includes a substrate, a circular grating resonator (CGR) formed on the substrate, the CGR including a center disc and a plurality of concentric rings spaced from one another; an input planar waveguide and an output planar waveguide each formed o... | 07/29/2008 |
| 7403678 | Optical switching element An optical switching element comprising: a multimode waveguide having an electro-optical effect; one or a plurality of first single mode waveguides; a plurality of second single mode waveguides; a first electrode arranged in the vicinity of one edge on one side of t... | 07/22/2008 |
| 7400788 | Linearized optical modulator having a plurality of coupling functions Invention discloses an apparatus that provides linear optical modulation of light carrier signals by an electrical modulation signal. Linearized modulation is achieved through the selection of a spacing profile between two optical transmission waveguides. The spacin... | 07/15/2008 |
| 7397989 | Optical switches Optical switches are described herein. In one embodiment, an exemplary optical switch includes, but is not limited to, a first waveguide, a second waveguide across with the first waveguide in an angle to form an intersection, and a pair of electrodes placed within a... | 07/08/2008 |
| 7394949 | High speed optical intensity modulator An optical device includes a phase modulator positioned along a branch waveguide of a mach-zehnder interferometer. The phase modulator includes an n-type region having a proximity to a p-type region that causes a depletion region to form when a bias is not applied t... | 07/01/2008 |
| 7394950 | Optical modulator An optical modulator of the Mach-Zehnder type including electrodes disposed above a substrate having a pair of linear portions of an optical waveguide includes a signal electrode to which modulating signals are applied; first and second earth electrodes; and a bias ... | 07/01/2008 |
| 7394948 | High speed optical phase modulator An optical device includes a phase modulator having a waveguide on a substrate. The phase modulator also includes an n-type region having a proximity to a p-type region that causes formation of a depletion region when a bias is not applied to the modulator. The depl... | 07/01/2008 |
| 7389019 | Variable photonic coupler A system is provided including a first waveguide having an optical input and a first optical output. A second waveguide includes a second optical output. A coupling region is between the first waveguide and the second waveguide. The coupling region controllably coup... | 06/17/2008 |
| 7389025 | Coupling light into microresonators An optical microresonator device is described including an optical waveguide and an optical microresonator positioned so as to optically couple to the waveguide. The waveguide includes a core and a metal cladding layer on at least part of one boundary of the core. | 06/17/2008 |
| 7386207 | In-line light sensor An integrated optical waveguide (1) having an in-line light sensor (2) integrally formed therewith for tapping off a small proportion of the signal transmitted along the waveguide (1). A first part (1A) of the waveguide leads to a photodi... | 06/10/2008 |
| 7384202 | Optical module An optical module includes: an optical plug that supports one end of an optical fiber; a receptacle unit having an optical element and a mounting surface to be abutted against the optical plug for optically coupling the optical plug and the optical element; and a ho... | 06/10/2008 |
| 7382943 | Four arm linearised Mach Zehnder modulator A four arm linearized Mach Zehnder modulator comprising first and second primary electro-optic waveguides; first and second secondary electro-optic waveguides, each secondary electro-optic waveguide being arranged adjacent to a primary elec... | 06/03/2008 |
| 7379640 | Tunable dispersion compensator and method of manufacturing the same A tunable dispersion compensator in which a heater portion can be easily constructed to reduce cost. A tunable dispersion compensator includes: an optical fiber having a grating portion; a heating unit for heating the grating portion to apply a temperature distribut... | 05/27/2008 |
| 7376310 | Optical waveguide element with controlled birefringence An optical waveguide element having a cladding layer formed on a substrate and at least one waveguide core formed in the cladding layer for transmitting an optical signal. Two heater sections are provided for shifting a phase of optical signals. The two heater secti... | 05/20/2008 |
| 7373024 | On-fiber microwave modulator and high speed switch for telecommunication applications Application of a communication signal, RF (radio frequency) or microwave signal to a modified optical fiber for modulating or switching-off the optical signal propagating within the optical fiber. The passive cladding material of an ordinary optical fiber is removed... | 05/13/2008 |
