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1.发明公开公开(公告)号：US20240356653A1
公开(公告)日：2024-10-24
申请号：US18137005
申请日：2023-04-20
Applicant: Raytheon Company
Inventor： David Byron Borlaug
Abstract: A communication system includes a laser that generates a laser light and a modulator that includes a modulation element configured to modulate the laser light with an input signal based on a bias voltage to produce an output signal. Control circuitry provides the bias voltage to a bias input of the modulation element and is configured to maintain a bias lock on at least two bias points of the modulation element during operation. The control circuitry is programmed to perform a bias lock operation that includes performing an initial voltage sweep on the modulation element and establish initial bias values for the at least two bias points. The circuit also providing a bias waveform to the bias input of the modulation element that varies over time and contains identifiable dither tones, determines harmonic power at the at least two bias points; and varies the bias waveform to determine harmonic power until the harmonic power is minimized to establish a bias lock with locked bias values.
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公开(公告)号：US20240348341A1
公开(公告)日：2024-10-17
申请号：US18364534
申请日：2023-08-03
Applicant: City University of Hong Kong
Inventor： Hanke FENG , Cheng WANG , Tong GE , Xiaoqing GUO , Yixuan YUAN
CPC classification number: H04B10/54 , G02F1/212 , G02F1/2255 , H04B2210/006
Abstract: An integrated MWP processing engine based on a thin-film lithium niobate (LN) platform capable of performing computation tasks of analog signals up to 92G samples per second is provided. By integrating a high-speed electro-optic modulation block and a multi-purpose low-loss signal processing section on the same chip fabricated from a 4-inch wafer-scale process, we demonstrate high-speed analog computation, i.e. first- and second-order temporal integration and differentiation with computing accuracies up to 98.1%, and deploy these functions to showcase three proof-of-concept applications, namely, ordinary differential equation solving, ultra-wideband signal generation and high-speed edge detection of images. We further leverage the image edge detector to enable a photonic-assisted image segmentation model that effectively outlines boundaries of melanoma lesion in medical images, achieving orders of magnitude faster processing speed and lower power consumption than conventional electronic processors. Our ultrafast LN MWP engine provides compact, low-power, low-latency and cost-effective solutions.
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公开(公告)号：US12117712B2
公开(公告)日：2024-10-15
申请号：US17769553
申请日：2019-10-18
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Yusuke Muranaka , Tatsushi Nakahara , Toshikazu Hashimoto
CPC classification number: G02F1/3136 , G02F1/035 , G02F1/212 , G02F1/3138
Abstract: An optical switch is provided which is capable of driving control by the same FPGA and the same driving circuit configuration, and hence is capable of driving at a high speed and a low consumption power. The optical switch of the present disclosure is a 1×N optical switch having a structure in which with respect to an optical switch, a driving circuit of the optical switch is integrated in the vicinity of a control electrode of the optical switch. The optical switch includes a plurality of 2×2 optical switches and N optical gates. Different bias voltages (Vb) are set between the optical switches and the optical gates, and a driver for the 2×2 optical switch of the driving circuit and a driver for the optical gate are of the same circuit form.
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公开(公告)号：US12105398B2
公开(公告)日：2024-10-01
申请号：US17429005
申请日：2019-02-14
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Josuke Ozaki , Shigeru Kanazawa , Yoshihiro Ogiso , Hiromasa Tanobe
CPC classification number: G02F1/2257 , G02F1/212
Abstract: Phase modulation electrode lines of a semiconductor Mach-Zehnder optical modulator are formed along waveguides. Output-side lead lines are bent in a direction crossing the extending direction of the waveguides in the plane of a dielectric layer and are connected to terminal resistors. The output-side lead lines are formed in a predetermined width corresponding to a desired impedance and make the width narrower than the predetermined width only in the bent portions and portions where the output-side lead lines crosses the waveguides.
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公开(公告)号：US20240319562A1
公开(公告)日：2024-09-26
申请号：US18187134
申请日：2023-03-21
Applicant: Rohde & Schwarz GmbH & Co. KG
Inventor： Julius Seeger
Abstract: A gate apparatus configured to perform an XOR operation on received input signals to provide a logical output signal, y. The apparatus includes at least one first signal input adapted to receive a first input signal; and at least one second signal input adapted to receive a second input signal. At least one of the received input signals is split into a first split signal portion fed to a photo diode to generate an electrical photocurrent supplied to a junction node, and a second split signal portion combined with at least a signal portion of the other signal received at the second signal input to generate a combined optical output signal supplied to an electro-optical modulator to provide the logical output signal, y. The electro-optical modulator is driven by a photocurrent processing unit having an input connected to the junction node.
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Patent Agency Ranking
6.发明公开公开(公告)号：US20240319558A1
公开(公告)日：2024-09-26
申请号：US18258272
申请日：2021-12-23
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Norikazu Miyazaki , Toru Sugamata
CPC classification number: G02F1/2252 , G02F1/0121 , G02F1/212 , G02F1/2255
Abstract: In an optical waveguide device having a plurality of intersections between a convex optical waveguide and a signal electrode, the generation of disturbance modulation at the intersections is effectively reduced, thereby achieving good operating characteristics. An optical waveguide device includes a substrate on which an optical waveguide is formed, an intermediate layer formed on the substrate, and a signal electrode and a ground electrode formed on the intermediate layer, in which the optical waveguide includes a protruding portion extending on the substrate, the signal electrode has an action portion that extends along the optical waveguide and controls a light wave propagating through the optical waveguide, and an intersection that crosses over the optical waveguide, and the intermediate layer is formed such that a thickness at the intersection is thicker than a thickness at the action portion.
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公开(公告)号：US12072528B2
公开(公告)日：2024-08-27
申请号：US17624441
申请日：2019-07-09
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Junji Sakamoto , Toshikazu Hashimoto
CPC classification number: G02B6/125 , G02F1/212 , G02B2006/12159
Abstract: An optical beam combiner circuit includes a plurality of branch portions configured to divide optical beams output from a plurality of input waveguides, a combiner unit configured to combine optical beams, each of the optical beams being one of the divided optical beams obtained by one of the plurality of branch portions, an output waveguide configured to output an optical beam obtained by the combiner unit combining the optical beams, a plurality of monitoring waveguides configured to output optical beams, each of the optical beams being another of the divided optical beams obtained by one of the plurality of branch portions, and a plurality of light-blocking grooves provided on both sides with respect to each input waveguide, the plurality of light-blocking grooves being positioned to enable stray light not coupled to the plurality of input waveguides to be reflected toward an end surface different from an exit end surface of each monitoring waveguide and also different from an exit end surface of the output waveguide.
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公开(公告)号：US12066735B2
公开(公告)日：2024-08-20
申请号：US17276656
申请日：2019-09-11
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Shigeru Kanazawa , Hiromasa Tanobe , Josuke Ozaki , Shinsuke Nakano , Nobuhiro Kikuchi
CPC classification number: G02F1/212 , G02F1/0121 , G02F1/2257
Abstract: In a terminator, a midpoint electrode is provided between a first signal electrode and a second signal electrode, a first resistor is connected between the first signal electrode and the midpoint electrode, a second resistor is connected between the second signal electrode and the midpoint electrode, a first GND electrode is provided on a side opposite to the side where the first resistor is provided with the first signal electrode interposed therebetween, a second GND electrode is provided on the side opposite to the side where the second resistor is provided with the second signal electrode interposed therebetween, and capacitances in the terminator are formed between the first signal electrode and the midpoint electrode, between the second signal electrode and the midpoint electrode, between the first signal electrode and the first GND electrode, and between the second signal electrode and the second GND electrode.
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公开(公告)号：US20240210784A1
公开(公告)日：2024-06-27
申请号：US18508170
申请日：2023-11-13
Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
Inventor： Yuji Hayami , Kosuke Okahashi
Abstract: An optical waveguide element includes an optical waveguide arranged on a main surface of an optical substrate, and a control electrode configured to control light waves propagating through the optical waveguide. The control electrode includes a first control electrode and a second control electrode facing each other across the optical waveguide on the main surface of the optical substrate. The first control electrode and the second control electrode each include a common electrode extending along the optical waveguide, a plurality of segment electrodes arranged closer to the optical waveguide than the common electrode and divided along an extending direction of the optical waveguide, and a plurality of connection electrodes connecting each of the plurality of segment electrodes to the common electrode. A low dielectric layer having a relative dielectric constant lower than a relative dielectric constant of the optical substrate is arranged between the common electrode and the optical substrate.
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公开(公告)号：US12022246B2
公开(公告)日：2024-06-25
申请号：US17623672
申请日：2019-07-01
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Keita Yamaguchi , Kenya Suzuki , Takashi Go , Osamu Moriwaki , Ai Yanagihara
CPC classification number: H04Q11/0005 , G02F1/212 , G02F1/225 , H04Q2011/0058
Abstract: In order to reduce the number of power driving elements, an optical signal processing device includes a control unit, a current generation unit, a connection portion, and an optical signal processing unit, the current generation unit includes one or a plurality of power driving elements s, the optical signal processing unit is an optical waveguide on a substrate, and a plurality of driven elements are connected in parallel to an identical one of the plurality of power driving elements and are driven.
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