公开(公告)号：US20170111121A1

公开(公告)日：2017-04-20

申请号：US15393355

申请日：2016-12-29

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Masahito MORIMOTO

IPC: H04B10/85 ,  H04B10/532 ,  H04B10/70

CPC classification number: H04B10/85 ,  H04B10/532 ,  H04B10/70 ,  H04L9/0852

Abstract: The present invention provides an optical communication method and an optical communication system in which eavesdropping is more difficult than in conventional techniques. An optical communication system in one embodiment of the present invention comprises: a photon pair generator which generates a correlated photon pair; a polarizer which is provided on an optical path of one photon of the correlated photon pair and direction of which is changeable based on information to be transmitted; a shutter which is provided between the photon pair generator and the polarizer on the optical path of the one photon of the correlated photon pair and which is capable of blocking the one photon of the correlated photon pair; and a photon detector which is provided on an optical path of another photon of the correlated photon pair.

公开(公告)号：US20170168247A1

公开(公告)日：2017-06-15

申请号：US15443987

申请日：2017-02-27

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Kengo WATANABE ,  Tsunetoshi SAITO ,  Katsuki SUEMATSU ,  Mitsuhiro IWAYA ,  Kohei KAWASAKI ,  Masahito MORIMOTO

IPC: G02B6/38

CPC classification number: G02B6/3885 ,  G02B6/3834 ,  G02B6/3839 ,  G02B6/3843 ,  G02B6/40

Abstract: A plurality of holes are formed in a ferrule. The holes are at sites penetrated by the tips of optical fibers. An opening is formed in the upper surface of the ferrule and an internal housing section is exposed from the opening. The housing section is at a site at which an optical fiber holding member is housed. The optical fibers are held by the optical fiber holding member. The optical fibers are multi-core fibers. In other words, the optical fibers have a specified axis of symmetry in a cross-section vertical to the longitudinal direction of the optical fibers and have orientation relative to a rotation direction having the longitudinal direction as the axis thereof.

公开(公告)号：US20210184419A1

公开(公告)日：2021-06-17

申请号：US17187147

申请日：2021-02-26

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Haruki OGOSHI ,  Masahito MORIMOTO

IPC: H01S3/094 ,  H01S3/067 ,  H01S3/0915 ,  H01S3/23 ,  H01S3/30

Abstract: A light source for Raman amplification to Raman-amplify signal light includes: plural incoherent light sources that output incoherent light; plural pumping light sources that output second-order pumping light; an optical fiber for Raman amplification to Raman-amplify the incoherent light with the second-order pumping light, and outputs the amplified incoherent light; and an output unit connected to the optical transmission fiber, receiving the amplified incoherent light, and outputting the amplified incoherent light as first-order pumping light having a wavelength that Raman-amplifies the signal light to the optical transmission fiber.

公开(公告)号：US20180123311A1

公开(公告)日：2018-05-03

申请号：US15810707

申请日：2017-11-13

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Haruki OGOSHI ,  Masahito MORIMOTO

IPC: H01S3/094 ,  H01S3/30 ,  H01S3/0915 ,  H01S3/23

CPC classification number: H01S3/094046 ,  H01S3/06754 ,  H01S3/0915 ,  H01S3/0933 ,  H01S3/094003 ,  H01S3/094011 ,  H01S3/094038 ,  H01S3/094096 ,  H01S3/09415 ,  H01S3/2316 ,  H01S3/302 ,  H01S2301/02

Abstract: A light source for Raman amplification to Raman-amplify signal light includes: plural incoherent light sources that output incoherent light; plural pumping light sources that output second-order pumping light; an optical fiber for Raman amplification to Raman-amplify the incoherent light with the second-order pumping light, and outputs the amplified incoherent light; and an output unit connected to the optical transmission fiber, receiving the amplified incoherent light, and outputting the amplified incoherent light as first-order pumping light having a wavelength that Raman-amplifies the signal light to the optical transmission fiber.