Title:
光干渉回路
Document Type and Number:
Japanese Patent JP6899562
Kind Code:
B2
Abstract:
To achieve an optical interference circuit with less variation in effective optical path length.SOLUTION: An optical interference circuit configured using a waveguide on a substrate, includes: a branch coupler for branching light from a reproduction reference light input port; a frequency synchronization detection circuit connected to one output of the branch coupler; and a transmission path length fluctuation detection circuit connected to the other output of the branch coupler. A length of a path via a reference light path from the branch coupler to a 3 dB coupler of the frequency synchronization detection circuit and a length via the reference light path of a path from the branch coupler to a 3 dB coupler of the transmission path length fluctuation detection circuit is equal.SELECTED DRAWING: Figure 4
Inventors:
Ryuji Go
Tomoya Akatsuka
Hayashi Sakamoto
Toshikazu Hashimoto
Katsuya Oguri
Katori Hidetoshi
Tomoya Akatsuka
Hayashi Sakamoto
Toshikazu Hashimoto
Katsuya Oguri
Katori Hidetoshi
Application Number:
JP2018162019A
Publication Date:
July 07, 2021
Filing Date:
August 30, 2018
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
National University Corporation Tokyo University
National University Corporation Tokyo University
International Classes:
H04B10/25; G02B6/125; G02B6/126; G02F1/125; G02F1/225; G02F2/00
Domestic Patent References:
| JP2017225017A | ||||
| JP2011215331A | ||||
| JP2012208530A | ||||
| JP2011259022A |
Foreign References:
| WO2011027895A1 | ||||
| US6256442 |
Attorney, Agent or Firm:
Patent Business Corporation Tani/Abe Patent Office