公开(公告)号：US20240146412A1

公开(公告)日：2024-05-02

申请号：US18546901

申请日：2022-02-24

Applicant: NITTO DENKO CORPORATION

Inventor： Yugo KASEDA ,  Yoshinori OSAKI ,  Takeshi TANAKA

IPC: H04B10/2507 ,  H04B10/077

CPC classification number: H04B10/2507 ,  H04B10/077

Abstract: An optical transmission system converts a first electrical signal into an optical signal, transmits the converted optical signal, and converts the transmitted optical signal into a second electrical signal. The optical transmission system includes an electrooptic conversion device, an optical transmission path, and a photoelectric conversion device. The first electrical signal includes a high-frequency communication signal of above 9 MHz and 10 GHz or less. The optical transmission system further includes an additional signal generating device for generating a low-frequency additional signal having a frequency of 1 Hz or more and 9 MHz or less. The electrooptic conversion device converts the first electrical signal including the additional signal generated in the additional signal generating device and the communication signal into the optical signal.

公开(公告)号：US20230170996A1

公开(公告)日：2023-06-01

申请号：US17917759

申请日：2021-04-07

Applicant: NITTO DENKO CORPORATION

Inventor： Yuichi TSUJITA ,  Kazumasa OKADA ,  Takeshi TANAKA ,  Keita KIYOSHIMA ,  Yoshinori OSAKI

IPC: H04B10/2581 ,  H04B10/2575

CPC classification number: H04B10/2581 ,  H04B10/2575 ,  H04B10/2507

Abstract: Provided is an optical transmission system that performs RoF transmission of an RF signal. The optical transmission system includes an electro-optical conversion device for receiving an RF signal, converting the RF signal into an optical signal, and transmitting the optical signal; a multimode optical fiber for transmitting the optical signal transmitted from the electro-optical conversion device; and an opto-electrical conversion device for converting the optical signal transmitted from the optical fiber into an RF signal and transmitting the RF signal. The optical fiber has a numerical aperture (NA) of 0.13 or more and 0.22 or less.