公开(公告)号：US09788089B2

公开(公告)日：2017-10-10

申请号：US14900411

申请日：2014-06-11

Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCY

Inventor： Ken-ichi Sato ,  Hiroshi Hasegawa ,  Hiroto Ishida

IPC: H04Q11/00 ,  H04J14/02 ,  H04Q3/52

CPC classification number: H04Q11/0005 ,  H04J14/0212 ,  H04J14/0217 ,  H04J14/0219 ,  H04Q3/52 ,  H04Q2011/0007 ,  H04Q2011/0015 ,  H04Q2011/0037 ,  H04Q2011/0052 ,  H04Q2213/1301

Abstract: An optical add-drop apparatus dropping a signal in input optical fibers in an optical cross-connect apparatus or adding a signal into output optical fibers from the cross-connect apparatus, optical cross-connect portions of the cross-connect apparatus connected such that a cross-connect portion internal connection output port is directly connected to an internal connection input port of another cross-connect portion and is indirectly connected via the other cross-connect portion to an internal connection output port of a further cross-connect portion, the add-drop apparatus having: photocouplers connected to part or all of the input fibers connected to each cross-connect portion; and drop signal receiving apparatuses each having optical switches each receiving and alternately selecting a signal output from photocouplers connected to respective different cross-connect portions of the cross-connect portions out of the photocouplers, the drop signal receiving apparatuses selecting a signal of a wavelength for each signal respectively output from the optical switches.

公开(公告)号：US10123100B2

公开(公告)日：2018-11-06

申请号：US15122289

申请日：2015-02-12

Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCY

Inventor： Ken-ichi Sato ,  Hiroshi Hasegawa ,  Yojiro Mori ,  Yuki Terada

IPC: H04B10/08 ,  H04B17/00 ,  H04Q11/00 ,  H04J14/02

Abstract: An optical network transmits a wavelength division multiplexing optical signal from a transmission to a reception node via a reconfigurable optical add/drop multiplexer and/or path cross-connect apparatuses. When optical or optical super channels made of successive optical subcarriers input from input optical fibers are routed or switched to an output optical fiber in the multiplexer and/or apparatus passed through by a wavelength division multiplexing optical signal transmitted from the predetermined transmission node to the predetermined reception node, the adjacent channels output to the same output fiber in each input fiber is collectively demultiplexed without being demultiplexed for the channels and is routed or switched to the output fiber. Channel routing paths and frequency arrangements are controlled such that the number of filtering times by a wavelength division filtering mechanism on one or both sides on the frequency axis of the channel becomes equal to or less than a predetermined value.

公开(公告)号：US09654851B2

公开(公告)日：2017-05-16

申请号：US14903379

申请日：2014-06-30

Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCY

Inventor： Ken-ichi Sato ,  Hiroshi Hasegawa

IPC: H04J14/00 ,  H04Q11/00

CPC classification number: H04Q11/0005 ,  H04J14/0209 ,  H04J14/0212 ,  H04Q11/0003 ,  H04Q2011/0007 ,  H04Q2011/0015 ,  H04Q2011/0016 ,  H04Q2011/0052

Abstract: An optical cross-connect apparatus optical nodes in an optical network, the optical nodes being mutually connected through internode connection optical fibers, the optical cross-connect apparatus having: optical cross-connect portions having internode connection input ports and internode connection output ports respectively connected to the internode connection optical fibers, and internal connection input and output ports, the optical cross-connect portions being connected such that an internal connection output port of a predetermined optical cross-connect portion is directly connected to an internal connection input port of another optical cross-connect portion and is indirectly connected via the another optical cross-connect portion to an internal connection output port of a further optical cross-connect portion, at least one optical cross-connect portion of the optical cross-connect portions including an internal connection input port and an internal connection output port for connecting to an optical cross-connect portion for expansion connected to none of the other optical cross-connect portions.