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    Optical transmission system and fiber type determination method
    72.
    发明授权
    Optical transmission system and fiber type determination method 有权

    公开(公告)号：US11876559B2

    公开(公告)日：2024-01-16

    申请号：US17876782

    申请日：2022-07-29

    Applicant: FUJITSU LIMITED

    Inventor： Goji Nakagawa ,  Takafumi Terahara ,  Hiroki Oi

    IPC: H04B10/08 ,  H04B10/2525 ,  H04B10/079

    CPC classification number: H04B10/2525 ,  H04B10/07955

    Abstract: An optical transmission system includes a first optical node, a second optical node, and an optical fiber provided between the first optical node and the second optical node. The optical transmission system further includes: a signal generator provided in the first optical node and configured to generate an optical signal including a plurality of wavelength channels and an empty channel; an optical transmission circuit provided in the first optical node and configured to output the optical signal to the optical fiber; an optical channel monitor provided in the second optical node and configured to measure reception power of each channel in the optical signal received through the optical fiber; and a processor configured to determine a type of the optical fiber based on the reception power of the empty channel, the reception power being measured by the optical channel monitor.

    Optical module
    73.
    发明授权
    Optical module 有权

    公开(公告)号：US11874512B2

    公开(公告)日：2024-01-16

    申请号：US17067424

    申请日：2020-10-09

    Applicant: FUJITSU OPTICAL COMPONENTS LIMITED

    Inventor： Kazuyuki Kuramochi

    IPC: H04B10/00 ,  G02B6/42

    CPC classification number: G02B6/4261 ,  G02B6/4277

    Abstract: An optical module includes: a module body that is configured to be inserted into a cage, at an entrance of the cage an electromagnetic wave shielding terminal being provided, and has a groove formed on one surface thereof and configured to engage with a latch part formed on the cage; and an engagement release member including a body that is provided with a pull tab, the body being slidably attached to the module body and configured to slide in response to an external force, and an arm part that extends from the body along the groove, and slides with respect to the groove in conjunction with the sliding of the body and release the engagement in a state in which the electromagnetic wave shielding terminal is pressed. The module body has a concave part on a surface of the groove, the surface being in contact with the arm part.

    Stud
    75.
    发明授权
    Stud 有权

    公开(公告)号：US11867221B2

    公开(公告)日：2024-01-09

    申请号：US17299394

    申请日：2019-10-28

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Pil Yong Oh ,  Jae Uk Kwak ,  Jeong Ryeol Lee

    IPC: F16B39/282 ,  F16B37/04

    CPC classification number: F16B39/282 ,  F16B37/048

    Abstract: The present disclosure relates to a stud improved to prevent loosening of the stud press-fitted into a sheet metal by increasing a resistance force against a torque.
    The stud includes a body provided to be inserted into a stud mounting hole formed on the sheet metal and formed with a screw thread to which a screw is fastened therein, a flange provided on one side of the body to have a larger diameter than the stud mounting hole and press-fitted into the sheet metal, and a rotation preventer protruding from the flange to have a diameter larger than the stud mounting hole and smaller than the flange and press-fitted into the sheet metal to prevent rotation of the stud, wherein the rotation preventer includes a plurality of rotation preventing protrusions having asymmetric shapes, and each of the plurality of rotation preventing protrusions includes a rotation preventing surface provided to be perpendicular to a tangent line of a circle connecting ends of the plurality of rotation preventing protrusions.

    Optical communication module equipped with heatsink
    76.
    发明授权
    Optical communication module equipped with heatsink 有权

    公开(公告)号：US11864354B2

    公开(公告)日：2024-01-02

    申请号：US17481492

    申请日：2021-09-22

    Applicant: FUJITSU OPTICAL COMPONENTS LIMITED

    Inventor： Kazuya Sasaki ,  Takatoshi Yagisawa ,  Tsutomu Ohtsu ,  Masami Kamioka

    IPC: H05K7/14 ,  H05K7/20 ,  H04B10/40

    CPC classification number: H05K7/2039 ,  H05K7/1427 ,  H04B10/40

    Abstract: An optical communication module includes: a circuit board; optical communication devices that are provided on an upper surface side of the circuit board; a case that accommodates the circuit board and the optical communication devices; and a heatsink that is attached to the case. The optical communication devices include a first device and a second device. The first device is located closer to an inlet opening for cooling air for cooling the heatsink than the second device is. A height from the circuit board to a top of the first device is greater than a height from the circuit board to a top of the second device. The heatsink is not equipped with a cooling fin in a first region where the first device is provided, and the heatsink is equipped with a cooling fin in a second region where the second device is provided.

    Refrigerator
    77.
    发明授权
    Refrigerator 有权

    公开(公告)号：US11859894B2

    公开(公告)日：2024-01-02

    申请号：US17341799

    申请日：2021-06-08

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Jinhong Yu ,  Youngmin You ,  Sungmo Kim ,  Jinyoung Song ,  Inyong Hwang ,  Jisick Hwang

    IPC: F25D17/06 ,  F25D13/04 ,  F25B39/02

    CPC classification number: F25D17/065 ,  F25B39/02 ,  F25D13/04

    Abstract: Disclosed is a refrigerator including a temperature controlled room with improved utilization of space because no component for cooling or heating is positioned inside a temperature controlled room. The refrigerator includes a cabinet; a storage room provided inside the cabinet; a temperature controlled room positioned inside the storage room and being at inside temperature which is independent from inside temperature of the storage room; a cool air flow path guiding cool air generated inside the cabinet to inside of the storage room; a first fan positioned on the cool air flow path to supply the cool air to the storage room; a cool air supplier forming at least one portion of the cool air flow path and including a second fan to supply the cool air to the temperature controlled room; and a heating portion configured to heat air to supply hot air to inside of the temperature controlled room.

    Optical transmitter, optical transceiver, and method of controlling bias voltage of electro-optic modulator
    80.
    发明授权
    Optical transmitter, optical transceiver, and method of controlling bias voltage of electro-optic modulator 有权

    公开(公告)号：US11852948B2

    公开(公告)日：2023-12-26

    申请号：US17742812

    申请日：2022-05-12

    Applicant: Fujitsu Optical Components Limited

    Inventor： Tetsuji Yamabana

    IPC: G02F1/21 ,  G02F1/225 ,  G02B6/293 ,  G02F1/025

    CPC classification number: G02F1/212 ,  G02B6/2935 ,  G02F1/025 ,  G02F1/225

    Abstract: In an optical transmitter having an electro-optic modulator with first child MZI and a second child MZI nested to form a parent MZI, and a processor that controls the bias voltages of electro-optic modulator. In the first section of a control loop, the processor simultaneously superimposes different dither signals onto the first bias voltage of the first child MZI and the second bias voltage of the second child MZI, and extracts the first phase error information for the first child MZI and the first-round third phase error for the parent MZI from a first monitoring result. In the second section of the control loop, the processor simultaneously superimposes different dither signals onto the first and second bias voltages, and extracts the second phase error information for the second child MZI and the second-round third phase error for the parent MZI from a second monitoring result.

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