Electro-optic Patents (Class 385/2)
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Publication number: 20150049978Abstract: In a region in which silicon semiconductor layers having first and second conductive types are stacked, a concavoconvex structure including a Si1-xGex (x=0.01 to 0.9) layer is formed on a surface of the first silicon semiconductor layer, a relatively thin dielectric is formed on the concavoconvex structure, and a silicon semiconductor layer having the second conductive type is further stacked.Type: ApplicationFiled: March 14, 2013Publication date: February 19, 2015Inventors: Junichi Fujikata, Shigeki Takahashi
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Patent number: 8958664Abstract: A semiconductor optical modulator includes a substrate; and a mesa portion having a first cladding layer disposed on the substrate, a core layer disposed on the first cladding layer, and a second cladding layer disposed on the core layer, the first cladding layer having a first conductivity type, the second cladding layer having a second conductivity type reverse to the first conductivity type. The core layer includes a first multi quantum well structure made from a first conductivity type semiconductor layer and a second multi quantum well structure made from an i-type semiconductor layer in which no impurity is intentionally doped. The second multi quantum well structure is disposed on the first cladding layer. The first multi quantum well structure is disposed on the second multi quantum well structure. The second cladding layer is disposed on the first multi quantum well structure.Type: GrantFiled: February 25, 2013Date of Patent: February 17, 2015Assignee: Sumitomo Electric Industries, Ltd.Inventor: Naoya Kono
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Publication number: 20150036963Abstract: An electro-optic modulator includes a semiconductor substrate, a core region and slab regions. The core region is formed on the semiconductor substrate and includes a first low concentration doping region, a second low concentration doping region and a high concentration doping region formed between the first low concentration doping region and the second low concentration doping region. Slab regions are formed on the semiconductor substrate. The slab regions are in contact with the core region. A width of a depletion region included in the core region may be controlled based on a reverse bias voltage applied between the first low concentration doping region and the second low concentration doping region. If the width of a depletion region is controlled, an optical signal transmitted through the depletion region may be controlled. The electro-optic modulator according to example embodiments may increase an operation speed and decrease a power consumption of a system.Type: ApplicationFiled: July 29, 2014Publication date: February 5, 2015Inventor: Amir Hossein NEJADMALAYERI
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Patent number: 8947764Abstract: An optical device includes a microdisk optical resonator element. The microdisk resonator element is formed on a substrate and has upper and lower portions respectively distal and proximal the substrate. An arcuate semiconductor contact region partially surrounds the microdisk resonator element. A first modulator electrode is centrally formed on the upper portion of the microdisk resonator element, and a second modulator electrode is formed on the arcuate contact region. A laminar semiconductor region smaller in thickness than the microdisk resonator element separates the arcuate contact region from the microdisk resonator element and is formed on the substrate so as to electrically connect the arcuate contact region to the lower portion of the microdisk resonator element.Type: GrantFiled: April 11, 2013Date of Patent: February 3, 2015Assignee: Sandia CorporationInventors: Christopher DeRose, William A. Zortman
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Publication number: 20150030280Abstract: A non-reciprocal device incorporating metamaterials which exhibit non-reciprocity through angular momentum biasing. The metamaterial, such as a ring resonator, is angular-momentum biased. This is achieved by applying a suitable mechanical or spatio-temporal modulation to resonant inclusions of the metamaterial, thereby producing strong non-reciprocity. In this manner, non-reciprocity can be produced without requiring the use of large and bulky magnets to produce a static magnetic field. The metamaterials of the present invention can be realized by semiconducting and/or metallic materials which are widely used in integrated circuit technology, and therefore, contrary to magneto-optical materials, can be easily integrated into the non-reciprocal devices and large microwave or optical systems. The metamaterials of the present invention can be compact at various frequencies due to the enhanced wave-matter interaction in the constituent resonant inclusions.Type: ApplicationFiled: June 5, 2014Publication date: January 29, 2015Inventors: Andrea Alu, Dimitrios Sounas, Nicholas Estep
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Patent number: 8938134Abstract: An apparatus comprising an optical modulator, wherein the optical modulator comprises a planar substrate, a first III-V semiconductor layer on the substrate, and a silicon layer on the substrate. The optical modulator includes a planar semiconductor optical waveguide having a hybrid optical core, the hybrid optical core including vertically adjacent lateral portions of the first III-V semiconductor layer and the silicon layer.Type: GrantFiled: December 21, 2012Date of Patent: January 20, 2015Assignee: Alcatel LucentInventor: Long Chen
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Publication number: 20150015937Abstract: A system for conversion or amplification using quasi-phase matched nonlinear optical wave-mixing comprises a first radiation source for providing a pump radiation beam, a second radiation source for providing a signal radiation beam, and a bent structure for receiving the pump radiation beam and the signal radiation beam. The radiation propagation portion of the bent structure is made of a uniform nonlinear optical material and the radiation propagation portion comprises a dimension taking into account the spatial variation of the nonlinear optical susceptibility along the radiation propagation portion as experienced by radiation travelling along the bent structure for obtaining quasi-phase matched nonlinear optical wave-mixing in the radiation propagation portion. The dimension thereby is substantially inverse proportional with the linear phase mismatch for the nonlinear optical process.Type: ApplicationFiled: September 24, 2014Publication date: January 15, 2015Applicant: VRIJE UNIVERSITEIT BRUSSELInventors: Nathalie VERMEULEN, John Edward SIPE, Hugo Jean Arthur THIENPONT
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Publication number: 20150010263Abstract: Forming an optical device includes growing an electro-absorption medium in a variety of different regions on a base of a device precursor. The regions include a component region and the regions are selected so as to achieve a particular chemical composition for the electro-absorption medium included in the component region. An optical component is formed on the device precursor such that the optical component includes at least a portion of the electro-absorption medium from the component region. Light signals are guided through the electro-absorption medium from the component region during operation of the component.Type: ApplicationFiled: July 2, 2014Publication date: January 8, 2015Inventors: Joan Fong, Wei Qian, Dazeng Feng, Mehdi Asghari
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Patent number: 8923658Abstract: An optical waveguide device having a Mach-Zehnder type waveguide formed on a substrate is provided in which a slope of two waveguides input to an optical coupler on an output side of the Mach-Zehnder type waveguide is 0 degrees, a waveguide of the optical coupler after being coupled by the optical coupler is a multi-mode waveguide, and the waveguide which is output from the optical coupler is a three-branched waveguide including an output main waveguide and two output sub waveguides interposing the output main waveguide therebetween.Type: GrantFiled: March 9, 2011Date of Patent: December 30, 2014Assignee: Sumitomo Osaka Cement Co., Ltd.Inventors: Yasuhiro Ishikawa, Katsutoshi Kondou, Norikazu Miyazaki, Satoshi Oikawa
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Patent number: 8923657Abstract: An electro-optic modulator includes a substrate including a top surface, a Y-shaped waveguide embedded into the top surface and including a first branch dedicated for transmitting transverse electric wave and a second branch dedicated for transmitting transverse magnetic wave, a ground electrode, a first modulating electrode, and a second modulating electrode. The top surface defines a first groove separating the first branch and the second branch, a second groove, and a third groove at a side of the second branch opposite to the first groove. The first modulating electrode and the ground electrode are located two sides of the first branch. The first modulating electrode covers a first sidewall of the second groove adjacent to the first branch. The ground electrode entirely covers the first groove and the second branch. The second modulating electrode covers a bottom surface of the third groove.Type: GrantFiled: January 9, 2013Date of Patent: December 30, 2014Assignee: Hon Hai Precision Industry Co., Ltd.Inventor: Hsin-Shun Huang
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Publication number: 20140376851Abstract: An optical semiconductor device includes a ring waveguide, and a serpentine waveguide configured to be optically connected to the ring waveguide and surround at least a part of the ring waveguide in a serpentine form. In the optical semiconductor device, the serpentine waveguide heats the ring waveguide by absorbing input light propagated from the ring waveguide to the serpentine waveguide.Type: ApplicationFiled: September 10, 2014Publication date: December 25, 2014Inventor: Tomoyuki Akiyama
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Patent number: 8917958Abstract: An electrical waveguide transmission device accepts a differential electrical input signal (e.g., S+ and S?) propagating along two separate signal conductors with grounded electrical return paths, and outputs the differential input signal to a series push-pull traveling wave electrode Mach-Zehnder optical modulator over a pair of output conductors that act as a return path for each other and provide a desired characteristic impedance matching that of the Mach-Zehnder optical modulator.Type: GrantFiled: December 20, 2012Date of Patent: December 23, 2014Assignee: Teraxion Inc.Inventor: Kelvin Prosyk
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Publication number: 20140368828Abstract: Systems and methods are presented for modulating a beam of radiation, such that the modulated beam exhibits substantially null residual amplitude modulation (RAM). An electro-optical modulator is presented that includes a waveguide, a first region associated with the waveguide and a second region associated with the waveguide. The waveguide is designed to guide a beam of radiation. A first electric potential applied to the first region causes a first modulation to the beam of radiation while a second electric potential applied to the second region causes a second modulation to the beam of radiation. The first modulation combined with the second modulation provides substantially null residual amplitude modulation of the beam of radiation.Type: ApplicationFiled: June 9, 2014Publication date: December 18, 2014Inventors: Juan Lloret Soler, Kirill Zinoviev, José Luis Rubio Guivernau, Eduardo Margallo Balbás
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Patent number: 8909003Abstract: An optical low drive voltage modulator electric field sensor device includes an electric field antenna. A low drive voltage modulator has an electrical voltage input electrically coupled to the electric field antenna, a light input, and a modulated light output. The optical low drive voltage modulator electric field sensor is configured to provide an optical output signal at the modulated light output having an optical parameter responsive to an electric field at the electric field antenna. The optical low drive voltage modulator electric field sensor device can also be configured to provide an RF output signal at a location physically remote from said antenna, where the RF output signal is responsive to an electromagnetic wave received at a remote antenna.Type: GrantFiled: January 19, 2010Date of Patent: December 9, 2014Assignee: University of Washington Through Its Center For CommercializationInventors: Michael J. Hochberg, Tom Baehr-Jones
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Patent number: 8909002Abstract: A light modulator (101) includes a waveguide (112) through which guided light propagates, a metal layer (113) formed adjacent to the waveguide (112), a conductive oxide layer (114) having electrical conductivity and formed on a surface of the metal layer (113) which is not adjacent to the waveguide (112), an insulating layer (115) formed adjacent to the conductive oxide layer (114), and a modulation circuit (102) that applies a voltage between the metal layer (113) and one of the conductive oxide layer (114) and the insulating layer (115). An interface (11) at which the conductive oxide layer (114) and the insulating layer (115) are adjacent to each other is formed at a distance shorter than a wavelength of the guided light in vacuum, from the surface of the metal layer (113) which is not adjacent to the waveguide (112).Type: GrantFiled: March 28, 2013Date of Patent: December 9, 2014Assignee: Panasonic CorporationInventors: Tatsuya Takaoka, Kousei Sano, Hidenori Wada
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Patent number: 8909001Abstract: An optical modulator comprises a substrate 4 having a thickness of 20 ?m or less and an electro-optic effect, a reinforcing substrate 6 holding the substrate 4 thereon and a resin layer 5 disposed between the substrate and the reinforcing substrate, in which the substrate 4 includes optical waveguides 1 and 2 and control electrodes 3 and 31 which control light waves propagating through the optical waveguide, in which the optical waveguides include at least two optical waveguides 1 separated from each other, and in which the control electrodes 31 disposed between the two optical waveguides are configured to include two electrodes 31 disposed along each optical waveguide, and a thin line 8 conducting the two electrodes 31 at a same potential.Type: GrantFiled: September 25, 2013Date of Patent: December 9, 2014Assignee: Sumitomo Osaka Cement Co., Ltd.Inventors: Norikazu Miyazaki, Motohiro Takemura, Youichi Hosokawa
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Patent number: 8909000Abstract: An optical waveguide for transmitting an optical signal input to the optical waveguide with a first frequency. The optical waveguide includes a plurality of modulator circuits configured along an optical transmission channel. Each modulator circuit includes at least one resonant structure that resonates at the first frequency when the modulator circuit that includes the at least one resonant structure is at a resonant temperature. Each modulator circuit has a different resonant temperature.Type: GrantFiled: January 13, 2014Date of Patent: December 9, 2014Assignee: Micron Technology, Inc.Inventors: Roy Meade, Gurtej Sandhu
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Publication number: 20140355923Abstract: A ridge waveguide structure includes a substrate having a top surface; a ridge structure protruding from the top surface; and a waveguide formed in the ridge structure and a shape of the waveguide is corresponding to a shape of the ridge structure; the ridge structure includes a Y-shaped input section and a Y-shaped output section, the Y-shaped input section includes a total input section, a first branch and a second branch, the first branch and the second branch are diverged from the total input section and converged into the Y-shaped output section. The relation also relates to an electro-optic modulator.Type: ApplicationFiled: December 23, 2013Publication date: December 4, 2014Applicant: HON HAI PRECISION INDUSTRY CO., LTD.Inventor: HSIN-SHUN HUANG
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Patent number: 8903202Abstract: A Mach-Zehnder optical modulator with a travelling wave electrode having one or more signal transmission line conductors and one or more ground transmission line conductors is provided. The modulator includes a ground strip conductor extending substantially in parallel to the ground transmission line conductors, and a distributed bridging structure electrically connecting the ground strip conductor and at least one of the ground transmission line conductors along a substantial portion of a length thereof. The distributed bridging structure may be embodied by a plurality of electrical connections at disposed regularly spaced intervals.Type: GrantFiled: November 15, 2013Date of Patent: December 2, 2014Assignee: Teraxion Inc.Inventors: Kelvin Prosyk, Ian Nicholas Woods
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Patent number: 8903204Abstract: Optical interconnect systems and methods are disclosed. An optical interconnect system includes a substrate, an optical waveguide, and first and second modulators. The optical waveguide has a first waveguide portion extending to a first coupling structure, a second waveguide portion extending from the first coupling structure to a second coupling structure, and a third waveguide portion extending from the second coupling structure. The first modulator is positioned adjacent the first coupling structure, and the second modulator is positioned adjacent the second coupling structure. The optical interconnect method includes modulating light with a first modulator to produce one-time modulated light, and modulating the one-time modulated light with a second modulator to produce two-time modulated light.Type: GrantFiled: April 8, 2011Date of Patent: December 2, 2014Assignee: University of DelawareInventors: Rohit Nair, Tian Gu, Michael W. Haney
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Patent number: 8897607Abstract: A tunable Radio Frequency (RF) filter device includes a tunable optical source configured to generate an optical carrier signal, and a modulator coupled to the tunable optical source and configured to modulate the optical carrier signal with an RF input signal. The tunable RF filter device may also include first and second optical waveguides coupled to the modulator and having first and second dispersion slopes of opposite sign, and an optical-to-electrical converter coupled to the first and second optical waveguides and configured to generate an RF output signal with a frequency notch therein based upon the tunable optical source.Type: GrantFiled: July 25, 2011Date of Patent: November 25, 2014Assignee: Harris CorporationInventors: Richard DeSalvo, Charles Middleton
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Patent number: 8897606Abstract: The ring resonator includes waveguides configured to guide light signals. The waveguides include an input waveguide and one or more loop waveguides. One of the loop waveguides is a primary loop waveguide that is optically coupled with the input waveguide at a wavelength of light. A tuner is configured to tune the wavelength at which the light is optically coupled from the input waveguide into the primary loop waveguide. One or more light detectors are each configured to provide an output indicating an intensity of light guided in one of the one or more loop waveguides. Electronics are configured to tune the tuner in response to the output from the light detector.Type: GrantFiled: December 1, 2010Date of Patent: November 25, 2014Assignee: Kotura, Inc.Inventors: Mehdi Asghari, Dazeng Feng, Po Dong, Roshanak Shafiiha, Shirong Liao, Ning-Ning Feng
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Patent number: 8897614Abstract: An electro-optical element includes a core layer made of an electro-optical material, a clad structure disposed on each of opposite sides of the core layer and configured to form an optical waveguide together with the core layer, and a pair of electrode layers, one of which being disposed on one side of the clad structure and another being disposed on another side of the clad structure. The clad structure includes a first clad layer and a second layer. The second clad layer has a dielectric permittivity larger than that of the first clad layer, and the second clad layer has a thickness thicker than that of the first clad layer.Type: GrantFiled: August 25, 2010Date of Patent: November 25, 2014Assignee: Ricoh Company, Ltd.Inventors: Shuichi Suzuki, Atsushi Sakai, Koichiro Nakamura, Jun Nakagawa
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Patent number: 8873895Abstract: To provide an optical modulator having a reduced size and reduced power consumption and capable of being easily connected to a waveguide and a method of manufacturing the optical modulator. The optical modulator has at least semiconductor layer (8) having a rib-shaped portion and doped so as to be of a first conduction type, dielectric layer (11) laid on first-conduction-type semiconductor layer (8), and semiconductor layer (9) laid on dielectric layer (11), having the width at the side opposite from dielectric layer (11) increased relative to the width of the rib-shaped portion, and doped so as to be of a second conduction type.Type: GrantFiled: March 1, 2011Date of Patent: October 28, 2014Assignee: NEC CorporationInventors: Junichi Fujikata, Motofumi Saitoh, Jun Ushida, Akio Toda
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Patent number: 8873896Abstract: An electro-optical phase modulator, dual polarization modulator applying that modulator and a phase modulation method are disclosed. A waveguide in an electro-optical substrate has at least two electrodes for modulating the waveguide. Each electrode receives a sequential bit of a precoded digital input and forms a shifting line from a first input end through interaction lengths near the waveguide causing modulation, shifted lengths distal from the waveguide for avoiding modulating the waveguide and transitions between these lengths by shifting the electrode away from or towards the waveguide. At least one electrode has a shorter interaction length closer to the input than a longer interaction length of the same electrode. Each electrode's modulation strength is proportional to its total interaction length, which doubles for each electrode, producing well matched S21 electro-optical responses from 10 kHz to 50 GHz, when shifted to account for the doubling.Type: GrantFiled: May 23, 2013Date of Patent: October 28, 2014Assignee: JDS Uniphase CorporationInventor: Karl Kissa
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Patent number: 8873894Abstract: A polarizer includes: a substrate; a dielectric layer positioned on the substrate; an optical waveguide positioned in the dielectric layer and for transmitting incident light; and a graphene layer positioned corresponding to the optical waveguide.Type: GrantFiled: July 25, 2012Date of Patent: October 28, 2014Assignee: Electronics and Telecommunications Research InstituteInventor: Jin Tae Kim
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Publication number: 20140314364Abstract: An electro-optic modulator includes a substrate, a Y-shaped waveguide, and a pair of first electrodes and a pair of second electrodes. The waveguide is formed in the substrate and includes a first Y-shaped section and a second Y-shaped section. The pair of first electrodes and the pair of second electrodes are formed on the substrate and receive voltages which modulate the first and second sections such that outputs of the first and second sections are equal to each other and an improved extinction ratio is thus obtained.Type: ApplicationFiled: July 19, 2013Publication date: October 23, 2014Inventor: HSIN-SHUN HUANG
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Publication number: 20140307994Abstract: An electro-optic modulator includes a substrate, a waveguide lens, a waveguide, and electrodes. The waveguide lens and the waveguide are formed inside the substrate. The waveguide connects the waveguide lens and includes a first branch and a second branch. The electrodes are configured to modulate outputs of the waveguide lens and the waveguide.Type: ApplicationFiled: October 31, 2013Publication date: October 16, 2014Applicant: HON HAI PRECISION INDUSTRY CO., LTD.Inventor: HSIN-SHUN HUANG
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Publication number: 20140307995Abstract: Electro-optic (EO) modulator and related device structures which can be used in conjunction with high EO materials to lower switching voltage and improve related performance parameters.Type: ApplicationFiled: February 3, 2014Publication date: October 16, 2014Inventors: Seng-Tiong Ho, Fei Yi, Tobin J. Marks
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Publication number: 20140307993Abstract: An electro-optic modulator includes a substrate having a top surface, and a waveguide having an input section, an output section, a first branch, and a second branch. The input section, the output section, and the first branch extends along a same straight line.Type: ApplicationFiled: August 22, 2013Publication date: October 16, 2014Applicant: HON HAI PRECISION INDUSTRY CO., LTD.Inventor: HSIN-SHUN HUANG
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Patent number: 8861921Abstract: The present invention provides an organic fibrous photovoltaic device with a frequency conversion region comprising a waveguide being arranged normal to the axis of the fiber.Type: GrantFiled: June 8, 2010Date of Patent: October 14, 2014Assignee: Wake Forest UniversityInventor: David Loren Carroll
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Publication number: 20140301694Abstract: A plasmonic device having a transparent conducting oxide (TCO) waveguide and a tunable voltage applied across the TCO and a metal layer for modulating an input optical signal.Type: ApplicationFiled: April 4, 2014Publication date: October 9, 2014Inventors: Ho Wai Lee, Stanley Burgos, Georgia Papadakis, Harry A. Atwater
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Patent number: 8855448Abstract: An optical modulator device comprising an interferometer. The interferometer includes an input optical coupler, an output optical coupler, and two or more controllable optical waveguides located on a substrate. Each controllable optical waveguide connects the input optical coupler to the output optical coupler and has two-state modulator along a segment thereof. The two or more controllable optical waveguides are connected to transmit an output to the output optical coupler, substantially different light amplitudes and/or phases when the two-state modulators of the two controllable optical waveguides are in different states, as driven by data streams having different information content. The two or more controllable optical waveguides are configured to modulate the light amplitudes and/or phases in a substantially same manner when the two-state modulators are in identical states.Type: GrantFiled: March 7, 2011Date of Patent: October 7, 2014Assignee: Alcatel LucentInventor: Christopher R. Doerr
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Publication number: 20140294336Abstract: Optical components are provided for use in information and communications technology (ICT) systems. For example, an optical assembly includes an optical module configured to modulate continuous wave optical beams of different powers into a plurality of modulated optical signals at different powers and couple the modulated optical signals onto different length optical mediums, so that lower power ones of the modulated optical signals are coupled to shorter ones of the optical mediums and higher power ones of the modulated optical signals are coupled to longer ones of the optical mediums. An optical power splitter includes a plurality of optical couplers configured to input continuous wave optical beams of the same power and output a plurality of continuous wave optical beams at different powers.Type: ApplicationFiled: June 12, 2014Publication date: October 2, 2014Inventors: Qing Xu, Robert Brunner, Stephane Lessard
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Publication number: 20140294333Abstract: A polarization control device in accordance with an exemplary embodiment of the present invention may include a first polarization converter for converting a polarization angle of an input optical signal in response to first control voltages, a second polarization converter for converting a polarization angle of an input optical signal in response to second control voltages, and a third polarization converter for converting an optical signal received from the first polarization converter or the second polarization converter into a first output optical signal having a linear polarization state and outputting the first output optical signal.Type: ApplicationFiled: November 26, 2013Publication date: October 2, 2014Applicant: Electronics and Telecommunications Research InstituteInventors: Sun Hyok CHANG, Hwan Seok CHUNG
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Publication number: 20140294334Abstract: A configuration for routing electrical signals between a conventional electronic integrated circuit (IC) and an opto-electronic subassembly is formed as an array of signal paths carrying oppositely-signed signals on adjacent paths to lower the inductance associated with the connection between the IC and the opto-electronic subassembly. The array of signal paths can take the form of an array of wirebonds between the IC and the subassembly, an array of conductive traces formed on the opto-electronic subassembly, or both.Type: ApplicationFiled: March 18, 2014Publication date: October 2, 2014Applicant: Cisco Technology, Inc.Inventors: Kalpendu SHASTRI, Bipin DAMA, Mark WEBSTER, David PIEDE
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Publication number: 20140294335Abstract: A method for manufacturing a semiconductor modulator includes the steps of preparing a substrate having a main surface including first and second areas; forming a stacked semiconductor layer on the main surface; forming an optical waveguide mesa by etching the stacked semiconductor layer using a mask, the optical waveguide mesa including an optical modulation portion; applying a resin on a top surface and a side surface of the optical waveguide mesa and on the substrate; forming a first opening in the resin on the second area of the substrate; forming an underlayer structure on the second area of the substrate in contact with the substrate; and forming a pad electrode on the underlayer structure in contact with the underlayer structure through the first opening of the resin. The underlayer structure includes an insulating layer made of a dielectric material.Type: ApplicationFiled: March 28, 2014Publication date: October 2, 2014Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Hideki YAGI, Takamitsu KITAMURA, Hirohiko KOBAYASHI, Yoshihiro YONEDA
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Patent number: 8842945Abstract: Three dimensionally integrated semiconductor systems include a photoactive device operationally coupled with a current/voltage converter on a semiconductor-on-insulator (SeOI) substrate. An optical interconnect is operatively coupled to the photoactive device. A semiconductor device is bonded over the SeOI substrate, and an electrical pathway extends between the current/voltage converter and the semiconductor device bonded over the SeOI substrate. Methods of forming such systems include forming a photoactive device on an SeOI substrate, and operatively coupling a waveguide with the photoactive device. A current/voltage converter may be formed over the SeOI substrate, and the photoactive device and the current/voltage converter may be operatively coupled with one another. A semiconductor device may be bonded over the SeOI substrate and operatively coupled with the current/voltage converter.Type: GrantFiled: August 9, 2011Date of Patent: September 23, 2014Assignee: SoitecInventors: Bich-Yen Nguyen, Mariam Sadaka
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Patent number: 8842943Abstract: An electro-optic modulator includes a substrate comprising a surface, a pair of transmission lines formed in the surface and extending substantially in parallel with each other, a pair of first strip electrodes formed on the surface and covering the respective transmission lines, and a pair of second strip electrodes positioned at two sides of the first strip electrodes and parallel with the first strip electrodes.Type: GrantFiled: September 28, 2012Date of Patent: September 23, 2014Assignee: Hon Hai Precision Industry Co., Ltd.Inventor: Hsin-Shun Huang
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Publication number: 20140254972Abstract: An object of the present invention is to provide a manufacturing method of an optical waveguide element whose DC drift is suppressed, and to provide a manufacturing method of an optical waveguide element, capable of adjusting DC drift in the middle of manufacturing processes so as to improve a fabrication yield. The method of manufacturing an optical waveguide element comprises a step of forming an optical waveguide in a substrate having an electro-optic effect, a step of forming a buffer layer, and a step of forming an electrode, in which one stage or a plurality of stages of an interface diffusion layer heat adjustment step (S1, S2) for adjusting a concentration distribution of a specific substance in the buffer layer by heating is included after the buffer layer is formed.Type: ApplicationFiled: July 19, 2012Publication date: September 11, 2014Applicant: SUMITOMO OSAKA CEMENT CO., LTD.Inventors: Tetsuya Fujino, Masanao Kurihara, Takashi Shinriki, Toru Sugamata
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Publication number: 20140248019Abstract: An electro-optical modulator with two electrodes as part of a transmission line of a first phase modulator and two electrodes as part of a transmission line of a second phase modulator included in two arms of a Mach-Zehnder-interferometer. An electrical controller applies a first electrical high-frequency-modulated voltage signals between the first and second electrodes and applies a second electrical high-frequency-modulated signals between the fourth and third electrodes. The electrical controller applies signals such that voltages applied to the first and fourth electrodes have substantially a same high-frequency content, and voltages applied to the second and third electrodes have substantially the same high-frequency content. In such configuration, a constant voltage offset is produced by either the voltages applied to the first and fourth electrodes or, the second and third electrodes. Thereby, cross-talk between electrodes, electrical losses, device size and fabrication costs may be reduced.Type: ApplicationFiled: March 4, 2013Publication date: September 4, 2014Applicant: RWTH Aachen UniversityInventors: Jeremy WITZENS, Florian MERGET
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Patent number: 8824836Abstract: An optical waveguide formed in a substrate including: a curved waveguide; and a splitter that is coupled to the curved waveguide and branches, wherein a low refraction index portion having an effective refraction index that is lower than that of a start point of the curved waveguide on an opposite side of the splitter is provided in a waveguide extending from the start point of the curved waveguide to the splitter.Type: GrantFiled: March 1, 2011Date of Patent: September 2, 2014Assignee: Fujitsu Optical Components LimitedInventor: Masaki Sugiyama
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Publication number: 20140241656Abstract: An electro-optic modulator for the modulation of optical radiation of a predetermined wavelength, the electro-optic modulator having at least one optical resonator in which a standing optical wave can be formed for the predetermined wavelength. In the resonator, at least two doped semiconductor sections—as seen in the longitudinal direction of the resonator—are arranged at a distance from one another, and the at least two doped semiconductor sections respectively lie locally at an intensity minimum of the standing optical wave.Type: ApplicationFiled: March 2, 2012Publication date: August 28, 2014Inventors: Stefan Meister, Aws Al-Saadi, Hans Joachim Eichler, Bulent Franke, Lars Zimmermann, Bernd Tillack
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Publication number: 20140238473Abstract: A method of drawing different materials includes forming a first material into a preform body defining at least one channel extending therethrough having a first cross-sectional area. A first element formed of a second material is inserted into the channel and with the preform body creates a preform assembly. The first element has a cross-sectional area that is less than the cross-sectional area of the channel, and the second material has a higher melting temperature than the first material. The preform assembly is heated so that the first material softens and the preform assembly is drawn so that the preform body deforms at a first deformation rate to a smaller cross-sectional area and the first element substantially maintains a constant cross-sectional area throughout the drawing process. Upon completion of the drawing step, the cross-sectional area of the channel is equivalent to the cross-sectional area of the first element.Type: ApplicationFiled: February 24, 2014Publication date: August 28, 2014Inventor: Esmaeil Banaei
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Patent number: 8818141Abstract: A Mach-Zehnder interferometer useful for analog or digital optical signal manipulation. In one example, the MZI is configured as an optical device that provides a balanced output. In another example, the MZI is configured as an optical device that provides a single ended output. Each device uses a silicon split or slotted wave guide having an electro-optically active material present within the slot. The balanced output device uses two slotted wave guides in push-pull configuration.Type: GrantFiled: June 27, 2011Date of Patent: August 26, 2014Assignee: University of WashingtonInventors: Michael J. Hochberg, Tom Baehr-Jones, Jeremy Witzens
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Publication number: 20140233877Abstract: An optical modulator includes a dielectric layer and a metal layer arranged on the dielectric layer. In the optical modulator, a first light of a first frequency and a second light of a second frequency that are incident upon the metal layer exit from the metal layer at different refractive angles due to surface plasmon generation.Type: ApplicationFiled: February 4, 2014Publication date: August 21, 2014Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Yeon-sang PARK, Jin-eun KIM, Chang-won LEE, Un-jeong KIM, Young-geun ROH, Jae-soong LEE, Sang-mo CHEON
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Patent number: 8805127Abstract: An optical waveguide device includes: a substrate which has an electro-optical effect; an optical waveguide which is formed on the substrate and/or inside the substrate; and an in-substrate electrode which is formed of a metal and provided inside the substrate.Type: GrantFiled: October 10, 2013Date of Patent: August 12, 2014Assignee: Fujitsu LimitedInventors: Tetsuya Miyatake, Takashi Shiraishi, Masaharu Doi
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Patent number: 8805126Abstract: A method and structure for a modulator which includes a forward-biased diode optimized for power and area to perform a tuning function, and a reverse-biased diode optimized for speed to perform a modulation function.Type: GrantFiled: August 17, 2012Date of Patent: August 12, 2014Assignee: International Business Machines CorporationInventors: Benjamin G. Lee, Jeffrey A. Kash, Alexander V. Rylyakov, Clint L. Schow
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Patent number: 8805130Abstract: Novel integrated electro-optic structures such as modulators and switches and methods for fabrication of the same are disclosed in a variety of embodiments. In an illustrative embodiment, a device includes a substrate with a waveguide and an optical resonator comprising polycrystalline silicon positioned on the substrate. First and second doped semiconducting regions also comprise polycrystalline silicon and are positioned proximate to the first optical resonator. The first optical resonator is communicatively coupled to the waveguide.Type: GrantFiled: March 16, 2011Date of Patent: August 12, 2014Assignee: Cornell UniversityInventors: Michal Lipson, Sasikanth Manipatruni, Kyle Preston, Bradley Schmidt
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Patent number: 8805136Abstract: A method and apparatus for tunable on-fiber Bragg gratings for DWDM and other applications on a small section of the core of single mode communication of an optical fiber. The method comprises etching most of the cladding on a small section of the fiber; coating the etched portion with a metallic electrode material and then with a layer of an electrooptic material; coating the electrooptic material with a photoresist; producing the Bragg grating pattern using a holographic process or on-axis interferometry; dissolving the non-exposed photoresist,; etching the grating pattern into the electrooptic material, and coating the Bragg gratings with a metallic material constructing the outer electrode. The presence of an electric signal on the electrodes will change the optical properties of the electrooptic material, as well as the diffraction/reflection properties of the Bragg gratings.Type: GrantFiled: May 8, 2006Date of Patent: August 12, 2014Assignee: Photonics On-Fiber Devices, Inc.Inventor: Mahmoud A. El-Sherif