| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 121 | POLARIZATION SEPARATION ELEMENT AND OPTICAL INTEGRATED ELEMENT | US13746749 | 2013-01-22 | US20130129273A1 | 2013-05-23 | Kazutaka Nara; Takashi Inoue; Hiroshi Kawashima; Noritaka Matsubara |
| A polarization separation element of an optical waveguide type formed on a substrate includes: an input-light demultiplexer; an output-light multiplexer; a first arm waveguide and a second arm waveguide that connect the input-light demultiplexer and the output-light multiplexer, each of the first and second arm waveguides including an optical waveguide having birefringence; and at least one heating unit formed above each of the first arm waveguide and the second arm waveguide, wherein a geometric length of the second arm waveguide is larger than a geometric length of the first arm waveguide by equal to or less than a degree corresponding to an amount of increase in an optical path length generated in the first arm waveguide when the at least one heating unit performs heating on the first arm waveguide to impart birefringence to the first arm waveguide. | ||||||
| 122 | Optical switch | US13140965 | 2009-12-16 | US08422110B2 | 2013-04-16 | Masahiko Ohta; Osamu Ishibashi; Fujio Okumura |
| An optical switch changes the refractive index of an electro-optical crystal according to an electric field applied to the electro-optical crystal so as to switch depending on whether the electro-optical crystal enables incident light to pass through or whether the electro-optical crystal enables incident light to be totally reflected. The optical switch includes an electrode section including a plurality of electrodes and formed in the electro-optical crystal, a principal plane including the largest area of each electrode on a same plane of the electro-optical crystal; an insulator layer on at least one plane of the electro-optical crystal, the plane being parallel with the electrode section, the insulator layer made of an insulator with lower dielectric constant than the electro-optical crystal; and a temperature control device formed on and in contact with the insulator layer and controls a temperature of the electrode section or dissipates heat generated in the electrode section. | ||||||
| 123 | Temperature controlled interferometer for phase demodulation | US12437549 | 2009-05-07 | US08320777B2 | 2012-11-27 | Reuven Zaibel; Gil Blecher |
| An interferometer includes an optical beam splitter that splits an input optical signal into a first optical signal propagating in a first optical path comprising free space and a second optical signal propagating in a second optical path comprising a dielectric medium. A differential delay delays the second optical signal relative to the first optical signal by a differential delay time that is proportional to at least one of a temperature and a refractive index of the dielectric medium. A temperature controller in thermal contact with the dielectric medium changes the temperature of the dielectric medium to control at least one of thermal expansion/contraction and a temperature dependent change in the refractive index of the dielectric medium, thereby changing the differential phase delay. An optical beam splitter/combiner optically coupled to the first and second optical paths generates a first and second interferometric optical signal having an amplitude and phase that is related to the differential delay. | ||||||
| 124 | OPTICAL MODULATION METHOD AND SYSTEM | US13526224 | 2012-06-18 | US20120294627A1 | 2012-11-22 | Ming QI; Wei XIONG; Dixuan ZHANG; Shuangyuan WU |
| The present invention provides an optical modulation method and system. The method includes: loading a first dither signal on an amplitude of an input data signal; loading a second dither signal on a bias voltage; and according to the bias voltage loaded with the second dither signal, obtaining a modulation signal according to the data signal whose amplitude is loaded with the first dither signal, and outputting the modulation signal as an output optical signal, where the first dither signal and the second dither signal are signals of the same frequency and the same phase, and a ratio of amplitudes of the signals is determined according to a tracking error, so that a feedback signal obtained according to the modulation signal is locked to a required bias point. In the embodiments of the present invention, lock precision may be improved. | ||||||
| 125 | An Opto-Isolator And A Laser Processing Apparatus Using The Same | US13443749 | 2012-04-10 | US20120206802A1 | 2012-08-16 | Nobuyuki YAMAZAKI |
| An opto-isolator including a Faraday rotator comprised of a crystal cylinder formed into a cylinder using a crystal that rotates polarized light; an enclosing tube surrounding the crystal cylinder; two cooling tubes each sized and positioned to allow both ends of the outer peripheral surface of the crystal cylinder to be inscribed within the cooling tubes and both end sections of an inner peripheral surface of the enclosing tube to be circumscribed around the cooling tubes; passages formed within the cooling tubes; a cooling medium circulating through a space formed among the crystal cylinder, the enclosing tube, and the two cooling tubes, and the passages; and a magnet disposed in an outer periphery of the enclosing tube. The opto-isolator further includes two polarizers respectively disposed on the optical path of light entering the Faraday rotator and an optical path of the light exiting the Faraday rotator. | ||||||
| 126 | Stabilizing optical resonators | US12203143 | 2008-09-02 | US08164816B1 | 2012-04-24 | Anatoliy Savchenkov; Andrey B. Matsko; Nan Yu; Lutfollah Maleki; Vladimir Ilchenko |
| Techniques and devices that stabilize optical resonators. | ||||||
| 127 | APPARATUS AND METHODS FOR WIDE TEMPERATURE RANGE OPERATION OF MICROMETER-SCALE SILICON ELECTRO-OPTIC MODULATORS | US13257295 | 2010-03-19 | US20120062974A1 | 2012-03-15 | Sasikanth Manipatruni; Rajeev Dokania; Alyssa B. Apsel; Michal Lipson |
| A thermally stabilized, high speed, micrometer-scale silicon electro-optic modulator is provided. Methods for maintaining desired temperatures in electro-optic modulators are also provided. The methods can be used to maintain high quality modulation in the presence of thermal variations from the surroundings. Direct current injection into the thermally stabilized electro-optic modulator is used to maintain the modulation performance of the modulator. The direct injected current changes the local temperature of the thermally stabilized electro-optic modulator to maintain its operation over a wide temperature range. | ||||||
| 128 | Optical modulator and optical transmitter | US12155120 | 2008-05-29 | US08098997B2 | 2012-01-17 | Masaki Sugiyama |
| A reduction in size and cost of an optical modulator is achieved with a simple configuration, while improving the modulation characteristics. An optical modulator modulates light branched by an optical coupler and then couples the light via the optical coupler. The optical coupler is formed in a substrate having electro-optic effects. An optical waveguide is formed in the substrate and, includes a turnback section and ends into which the light branched by the optical coupler is input. A signal electrode is provided in the substrate along the optical waveguide. A modulation signal to modulate the light passing through the optical waveguide is input to the signal electrode. | ||||||
| 129 | WAVELENGTH CONTROL DEVICE AND WAVELENGTH CONTROL METHOD | US13113243 | 2011-05-23 | US20110286696A1 | 2011-11-24 | NORIYOSHI OKU |
| The wavelength control device comprises a first Mach-Zehnder filter which receives a first optical signal and outputs an optical signal having a predetermined wavelength, a second Mach-Zehnder filter which receives a second optical signal and outputs an optical signal having a predetermined wavelength, a heating unit heating respective parts of either one of the waveguides of the first and second Mach-Zehnder filters, a first wavelength detecting unit which receives an optical signal from the first Mach-Zehnder filter and detects a wavelength thereof, a second wavelength detecting unit which receives an optical signal from the second Mach-Zehnder filter and detects a wavelength thereof, a power control unit which controls power supplied to the heating unit based on the wavelength received from the first wavelength detecting unit, and an output unit which outputs a wavelength value based on the wavelength received from the second wavelength detecting unit. | ||||||
| 130 | Optical control device | US12555404 | 2009-09-08 | US08031986B2 | 2011-10-04 | Takashi Shiraishi |
| The optical device includes a substrate having an electrooptic effect; a plurality of optical waveguides formed in the substrate in parallel to one another; and a polarization inversion region which is disposed a part of the substrate and which has a polarization characteristic that is an inverse to that of the substrate, wherein a profile of a boundary between the polarization inversion region and a remaining region in which the polarization is not inverted is configured such that accumulated amounts of distortion that affects the respective waveguides over coordinates along a light propagation direction are substantially identical. | ||||||
| 131 | Low Switching Voltage, Fast Time Response Digital Optical Switch | US12673341 | 2007-08-14 | US20110150387A1 | 2011-06-23 | Luigi Pierno; Massimiliano Dispenza |
| Disclosed herein is a digital electro-optical switch (1) comprising: an electro-optical substrate (3); a Y-shaped optical waveguide (2) formed in the substrate (3) and including an input branch (4) configured to be connected to an input optical waveguide, and two output branches (5) configured to be connected to respective output optical waveguides; and electrically conductive electrodes (6, 7) formed on the substrate (3) and including an inner electrode (7) arranged between the output branches (5), substantially at a branching area of the optical waveguide (2), and two outer electrodes (6) arranged outside the output branches (5), on opposite sides of the inner electrode (7), the outer electrodes (6) being electrically operable to make the electro-optical switch (1) operative between a first switching state wherein transmission of optical energy is enhanced between the input branch (4) and a first one of the output branches (5), and substantially inhibited in a second one of the output branches (5), and a second switching state wherein transmission of optical energy is enhanced between the input branch (4) and the second output branch (5), and substantially inhibited in the first output branch (5); and an optically transparent, electrically conductive film (9) arranged between each electrode (6, 7) and the substrate (3). | ||||||
| 132 | Bias controller | US12161735 | 2008-06-17 | US07965433B2 | 2011-06-21 | Andrew James Smith; Christopher Ralph Pescod |
| The present invention relates to a bias controller for a dual output electro-optic modulator and a method for controlling the bias of a dual output electro-optic modulator. The invention further comprises an optical commutator switch with a plurality of dual-output electro-optic modulators interconnected in a tiered arrangement, and control means for deriving measurements of optical power from each of the modulators. The optical commutator is further used for determining respective bias control signals to achieve and maintain operation of the modulators substantially at their quadrature bias points, and further for generating said respective bias control signals for applying them to the respective modulators. | ||||||
| 133 | Delay interferometer using magneto-optic effect | US12923721 | 2010-10-05 | US20110096338A1 | 2011-04-28 | Nobuhiro Fukushima |
| A delay interferometer includes first and second optical paths into which incident signal light is split, a first converter including one or more conversion parts to convert the signal light on the first optical path into circularly polarized light and to convert the circularly polarized light into linearly polarized signal light, a phase adjuster to shift an optical phase of the circularly polarized light through a magneto-optic effect, and a second converter to convert a polarization state of the signal light on the second optical path into substantially the same polarization state as a polarization state of the linearly polarized signal light. | ||||||
| 134 | Software-based electro-optic modulator bias control systems and methods | US11656700 | 2007-01-23 | US07903981B2 | 2011-03-08 | Steve S. Cho; Cecil D. Smith |
| The present invention provides a software-based electro-optic modulator bias control system resident in an optical transceiver including an electro-optic modulator that includes an optical-to-electrical converter including a transimpedance amplifier, an analog-to-digital converter, and a software algorithm, wherein the software algorithm is operable for determining an optimum bias voltage applied to the electro-optic modulator by discovering a maximum average optical power transmitted by the electro-optic modulator, or quadrature point, wherein the quadrature point is discovered by determining at what bias voltage the slope of an average optical power transmitted by the electro-optic modulator, defined as an optical power change given an incremental bias voltage change, is equal to zero. The software-based electro-optic modulator bias control system also includes a control loop operable for determining if a radio frequency port of the electro-optic modulator is driven to a peak-to-peak voltage that is greater than (over-driven) or less than (under-driven) the peak-to-trough voltage of a response curve of the electro-optic modulator. | ||||||
| 135 | Light modulator and its fabrication method | US11992866 | 2006-09-27 | US07856155B2 | 2010-12-21 | Takashi Shinriki; Katsutoshi Kondou; Tsutomu Saitou |
| It is an object of the invention to provide a light modulator using a thin plate having a thickness of 20 μm or less and capable of stably holding a conductive film suppressing troubles such as resonance phenomenon of microwaves in a substrate and pyro-electric phenomenon and to provide a method of fabricating the light modulator. The light modulator includes: a thin plate (10) formed of a material having an electro-optic effect and having a thickness of 20 μm or less; a light waveguide (11) formed on the front or rear surface of the thin plate; and modulation electrodes (13, 14) formed on the front surface of the thin plate to modulate light passing through the light waveguide. The light modulator further includes a reinforcing plate (16) bonded to the rear surface of the thin plate and a conductive film (17) continuously formed in the range from the side surface of the thin plate to the side surface of the reinforcing plate. | ||||||
| 136 | Optical output controller and its control method | US12532018 | 2008-03-10 | US07855830B2 | 2010-12-21 | Shuji Inoue; Hiroshi Mitani |
| An optical output controller includes a wavelength conversion device operable to change the wavelength of pumped laser light; a heating/cooling unit operable to control the temperature of the wavelength conversion device; a temperature detector which detects the temperature of the wavelength conversion device; a temperature controller operable to control the heating/cooling unit such that the detected temperature corresponds to a target temperature; an optical output detector operable to detect the optical output from the wavelength conversion device; an optical-output maximization controller operable to determine a temperature at which the optical output is maximized according to the optical output detected by the optical output detector and from the detected temperature detected by the temperature detector and, further, outputs the temperature difference between the determined temperature and the detected temperature; and an adder which adds the temperature difference outputted from the optical-output maximization controller to the target temperature; wherein the temperature difference is added to the target temperature to correct the target temperature for maximizing the optical output. | ||||||
| 137 | OPTICAL MODULATOR | US12678534 | 2008-09-19 | US20100209040A1 | 2010-08-19 | Kenji Kawano; Eiji Kawazura; Yuji Sato; Masaya Nanami; Seiji Uchida; Nobuhiro Igarashi; Toru Nakahira; Satoshi Matsumoto |
| In an optical modulator comprising substrate 1 having electro-optical effect, two optical waveguides 3a, 3b formed in the substrate, buffer layer 2 formed on the substrate, traveling-wave electrode 4 having center conductor 4a and ground conductors 4b, 4c above the buffer layer, and ridge sections formed with recessed sections 9a to 9c by carving at least a part of the substrate where an electrical field strength of high-frequency electrical signal propagating the traveling-wave electrode is strong, in which the ridge sections include center conductor ridge section 8a having the center conductor formed above and ground conductor ridge section 8b having the ground conductor formed above, and the center conductor ridge section has one of the two optical waveguides formed therein, the recessed sections are practically symmetrical to the center line between the two optical waveguides and the traveling-wave electrode is practically symmetrical to the center line of the center conductor. | ||||||
| 138 | Optical modulators | US12260276 | 2008-10-29 | US07764851B2 | 2010-07-27 | Akiyoshi Ide; Jungo Kondo; Osamu Mitomi; Yasunori Iwasaki; Hiroki Kobayashi |
| An optical modulator has an optical waveguide substrate having a pair of principal surfaces, a pair of side surfaces an incident face and exit face of light, the substrate being composed of a ferroelectric material; a channel optical waveguide having at least a pair of branch sections, a multiplexing section of the branch sections and an exit section provided on the downstream of the multiplexing section, the waveguide being formed on the principal surface of the optical waveguide substrate; a modulation electrode electrodes for applying a signal voltage for modulating light propagating in the branch sections; and a reflective groove for reflecting leaked light of off-mode emitted from the multiplexing section and emitting the light from a principal surface of the optical waveguide substrate. An operating point of the optical modulator is controlled by changing a DC bias applied on the modulation electrode based on optical output of the leaked light of off-mode. | ||||||
| 139 | WAVELENGTH CONVERSION ELEMENT, LASER LIGHT SOURCE, TWO-DIMENSIONAL IMAGE DISPLAY AND LASER PROCESSING SYSTEM | US11997099 | 2006-07-26 | US20100165452A1 | 2010-07-01 | Hiroyuki Furuya; Akihiro Morikawa; Kiminori Mizuuchi; Kazuhisa Yamamoto; Shinichi Kadowaki |
| A wavelength conversion element is provided with a substrate including a nonlinear optical single crystal having a periodically poled structure, the visible light transmittance of the substrate is 85% or higher when ultraviolet light is irradiated to the substrate, and laser light having an average output of 1 W or more is outputted by shortening the wavelength of laser light having a wavelength of 640 nm to 2000 nm. By improving visible light transmission characteristics when the ultraviolet light is irradiated in this way, the breakdown of crystal can be prevented and the stabilization of output characteristics at high output can be realized. As a result, the absorption of green light induced by ultraviolet light can also be suppressed, and the saturation of output and the breakdown of crystal can be avoided. | ||||||
| 140 | Conversion efficiency expansion in wavelength converting optical packages | US11880231 | 2007-07-20 | US07729394B2 | 2010-06-01 | Jacques Gollier |
| Particular embodiments of the present invention relate generally to altering the effective conversion efficiency curve of an optical package employing a semiconductor laser and an SHG crystal or other type of wavelength conversion device. For example, according to one embodiment of the present invention, a method of controlling an optical package is provided where the optical package is tuned such that ascending portions of a transmission curve representing a spectral filter are aligned with descending portions of a conversion efficiency curve representing a wavelength conversion device. With the filter and wavelength conversion device so aligned, the optical package is further tuned such that the wavelength of the fundamental laser signal lies within a wavelength range corresponding to aligned portions of the ascending and descending portions of the transmission and conversion efficiency curves. Additional embodiments are disclosed and claimed. | ||||||
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