Invention Grant
- Patent Title: Optical transmission system, control apparatus of wavelength selective switch, and insertion loss correction method
-
Application No.: US16079193Application Date: 2017-02-09
-
Publication No.: US10735091B2Publication Date: 2020-08-04
- Inventor: Takanori Inoue
- Applicant: NEC Corporation
- Applicant Address: JP Tokyo
- Assignee: NEC CORPORATION
- Current Assignee: NEC CORPORATION
- Current Assignee Address: JP Tokyo
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@78ceace5
- International Application: PCT/JP2017/004785 WO 20170209
- International Announcement: WO2017/154454 WO 20170914
- Main IPC: H04J14/00
- IPC: H04J14/00 ; H04B10/077 ; H04J14/02
Abstract:
A multiplexer inserts a dummy signal light into a main signal. A light intensity monitor acquires the intensity of the light of each wavelength of a light output from a wavelength selective switch. A light source controller controls the insertion of the dummy signal light into the main signal, and release of the insertion. A difference calculator calculates the difference between a first light intensity that has been acquired in a state in which the dummy signal light is inserted into the main signal and a second light intensity that has been acquired in a state in which the dummy signal light is not inserted into the main signal. An insertion loss calculator calculates an insertion loss in the wavelength selective switch based on the calculated difference. An insertion loss controller controls the insertion loss in the wavelength selective switch based on the calculated insertion loss.
Public/Granted literature
Information query
