-
公开(公告)号：US11631431B2
公开(公告)日：2023-04-18
申请号：US17856321
申请日：2022-07-01
摘要： Apparatus and method for transferring data in a data storage system, such as but not limited to a hard disc drive (HDD). An optical link is provided between an analog front end (AFE) of a data storage device controller circuit (SOC) and a preamplifier/driver circuit (preamp) mounted to a rotary actuator to transfer an analog domain signal. A selected component is extracted from the signal using a modulation element such as a micro-resonance ring (MRR) or a Mach-Zehnder Interferometer Modulation (MZM) device. The extracted component is forwarded to a processing circuit to facilitate a transfer of data between a local memory and a non-volatile memory (NVM). The optical link includes a flexible portion in a flex circuit affixed to the rotary actuator and which supports the preamp. Multiplexed read, write, and power control signals are concurrently transmitted via the optical link. The link can concurrently service multiple head-disc assemblies (HDAs).
-
公开(公告)号：US20230112785A1
公开(公告)日：2023-04-13
申请号：US17914140
申请日：2021-03-31
申请人： TDK CORPORATION
发明人： Kenji NAGASE , Hiroshi TAKE
摘要： An electro-optical device, including: a substrate; an optical waveguide film formed of electro-optical material provided in a predetermined region on the substrate; a buffer layer provided adjacent to the optical waveguide film; and an electrode for applying an electric field to the optical waveguide film, and a non-light-transmission optical waveguide film is provided outside the predetermined region. According to the electro-optical device of the present disclosure, the propagation loss of light can be suppressed.
-
公开(公告)号：US11624942B2
公开(公告)日：2023-04-11
申请号：US17349389
申请日：2021-06-16
摘要： Described herein are methods, systems, and apparatuses to utilize an electro-optic modulator including one or more heating elements. The modulator can utilize one or more heating elements to control an absorption or phase shift of the modulated optical signal. At least the active region of the modulator and the one or more heating elements of the modulator are included in a thermal isolation region comprising a low thermal conductivity to thermally isolate the active region and the one or more heating elements from a substrate of the PIC.
-
4.发明授权公开(公告)号：US11619855B2
公开(公告)日：2023-04-04
申请号：US17227352
申请日：2021-04-11
发明人： Moon Soo Park , Tae Young Jeon
IPC分类号： G02F1/225 , G02F1/035 , H04B10/516 , H04B10/40 , H04B10/548 , G02F1/015 , G02F1/21 , H04B10/588 , H04B10/50
摘要： An optical transceiver including a submount, a Mach-Zehnder Modulator (MZM), bonding wires, and a low pass filter type matching network is provided. The MZM includes an input port and an output port and disposed on the submount. The bonding wires are coupled to the submount and the MZM. The low pass filter type matching network is coupled to the bonding wires and is configured to absorb inductance of the bonding wires at a high frequency.
-
公开(公告)号：US11604369B2
公开(公告)日：2023-03-14
申请号：US17654867
申请日：2022-03-15
发明人： Masaru Takechi
摘要： A bias control method of a nested optical modulator includes detecting a frequency component that has a frequency equal to a frequency of a dither signal and that is included in an output of the optical modulator, with changing a voltage value of a first bias, to measure a first error-detection value, obtaining a first error-detection curve representing a relationship between the first error-detection value and the voltage of the first bias, obtaining a first correction value based on the first error-detection curve, and obtaining the first error-detection value obtained when the first bias voltage value is equal to a voltage value obtained by adding the first correction value to the first bias voltage value at a zero-crossing point of the first error-detection curve, as a first error control value. The first bias is controlled so that the first error-detection value is the first error control value.
-
公开(公告)号：US11600963B2
公开(公告)日：2023-03-07
申请号：US16855084
申请日：2020-04-22
申请人： The Boeing Company
摘要： Chip technology for fabricating ultra-low-noise, high-stability optical devices for use in an optical atomic clock system. The proposed chip technology uses diamond material to form stabilized lasers, frequency references, and passive laser cavity structures. By utilizing the exceptional thermal conductivity of diamond and other optical and dielectric properties, a specific temperature range of operation is proposed that allows significant reduction of the total energy required to generate and maintain an ultra-stable laser. In each configuration, the diamond-based chip is cooled by a cryogenic cooler containing liquid nitrogen.
-
公开(公告)号：US20230057036A1
公开(公告)日：2023-02-23
申请号：US17797207
申请日：2021-01-20
申请人： TDK Corporation
发明人： Anthony Reymund Melad Binarao , Cheng Bu HENG , Hiroshi TAKE , Kenji NAGASE , Shinji IWATSUKA , Hiroki HARA
摘要： To provide an optical modulation element whereby reduced drive voltage and suppression of DC drift can be obtained at the same time. An optical modulation element includes: a substrate; and an optical waveguide formed of an electrooptic material film formed on the substrate and having a ridge part which is a protruding portion, and a slab part having a smaller film thickness than the ridge part 11r. The optical waveguide includes a first waveguide part having a first ridge width and a first slab film thickness and to which an RF signal is applied, and a second waveguide part having a second ridge width and a second slab film thickness different from the first slab film thickness and to which a DC bias is applied.
-
公开(公告)号：US20230055077A1
公开(公告)日：2023-02-23
申请号：US17820673
申请日：2022-08-18
发明人： Ruizhi SHI , Ari NOVACK , Alexander RYLYAKOV , Eu-Jin Andy LIM
摘要： An apparatus includes a lithium niobate (LN) layer, and a planar electro-optical modulator having at least one hybrid optical core segment formed of a portion of the LN layer and an optical guiding rib. The optical guiding rib may be located in a top silicon layer of a silicon photonics (SiP) chip, to which a thin-film LN chip is flip-chip mounted, and may be coupled to optical waveguide cores in a first silicon core layer of the SiP chip. One or more drive electrodes are disposed between a substrate of the SiP chip and the LN layer. In some embodiments hybrid optical core segments may include silicon nitride core segments and may form an MZM configured to be differentially or dual-differentially driven.
-
公开(公告)号：US20230046152A1
公开(公告)日：2023-02-16
申请号：US17757048
申请日：2020-12-11
发明人： Richard GROTE
IPC分类号： G01B9/02001 , G01K1/14 , G01B9/02 , G02F1/225 , G02F1/21
摘要： The invention refers to a frequency shifter for heterodyne interferometry measurements, comprising a chip, an input waveguide configured to guide a light beam, at least four phase modulators, each being arranged to receive the light beam from the input waveguide and configured to modulate a phase of the light beam, an output combiner being arranged to let the light beams modulated by each phase modulator interfere, a first output waveguide coupled to the output combiner and configured to receive the modulated light beams constructively interfering at the output combiner, a second output waveguide coupled to the output combiner and configured to receive the modulated light beams destructively interfering at the output combiner, wherein the input waveguide, the phase modulators, the output combiner, the first output waveguide and the second output waveguide are arranged on the chip.
-
公开(公告)号：US11579345B2
公开(公告)日：2023-02-14
申请号：US16618638
申请日：2017-12-15
发明人： Ming Zhu , Xue Dong , Meili Wang , Fei Wang , Wei Wang
IPC分类号： G02B5/20 , H01L31/0232 , G02F1/21 , G02F1/35 , G02F2/00
摘要： The present disclosure relates to a reflective device and a display apparatus. In one embodiment, a reflective device includes: a resonant cavity configured to reflect a light of a first wavelength range; and a light conversion structure disposed within the resonant cavity and configured to convert an incident light of a second wavelength range into the light of the first wavelength range.
-
-
-
-
-
-
-
-
-
搜索结果
1575 条记录 (耗时 0.032 秒)