公开(公告)号：US20240118127A1

公开(公告)日：2024-04-11

申请号：US18275848

申请日：2021-02-26

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Daisuke IIDA ,  Yoshitaka ENOMOTO ,  Chihiro KITO ,  Tatsuya OKAMOTO ,  Yusuke KOSHIKIYA ,  Yoshifumi WAKISAKA ,  Nazuki HONDA

IPC: G01H9/00

CPC classification number: G01H9/004

Abstract: The present disclosure is an optical line test system that detects a distribution of loss points of an optical line in a longitudinal direction, using a coherent light measurement device, applies vibration to facility disposed on a path of the optical line, detects a vibration point of the optical line in a longitudinal direction upon applying the vibration, using the coherent light measurement device, and identifies the loss point based on correspondence between the detected loss point and vibration point.

公开(公告)号：US20240126030A1

公开(公告)日：2024-04-18

申请号：US18277753

申请日：2021-03-25

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yoshitaka ENOMOTO

IPC: G02B6/43

CPC classification number: G02B6/43

Abstract: An object of the present invention is to provide a multicore non-reflective terminal portion having a small influence of reflected light on an optical transmission system and having a small number of parts, and an optical path testing method using the same.
A multicore non-reflective terminal portion 70 according to the present invention includes: 2n (n is a natural number) optical fibers 71 each having a vertically polished end face on one end side and an angle-polished end face on the other end side, a 2n-core MT connector 72 that collects the 2n optical fibers 71 and is attached to the one end side of the optical fibers 71, and n-core MT connectors (73a, 73b) attached to the other end side of the optical fibers 71 for each of two groups of the 2n optical fibers 71.