Optical transport apparatus, optical demultiplexer, and method of controlling optical demultiplexing
US10491321B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Jan 23, 2019 |
| Grant date | Nov 26, 2019 |
| Priority date | — |
| Expiry date | Jan 23, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/07
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical demultiplexer has at least one unit circuit formed by three AMZs having a same arm length difference and cascaded in a tree structure in which two output ports of the 1st AMZ are connected to the 2nd AMZ and the 3rd AMZ, respectively, wherein the unit circuit has first and second monitors connected to the first and second output ports of the 2nd AMZ, and third and fourth monitors connected to the first and second output ports of the 3rd AMZ, a first control circuit controlling the transmissivity of the 1st AMZ so as to increase the monitoring result of the second and fourth monitors, a second control circuit controlling the transmissivity of the 2nd AMZ to decrease the monitoring result of the first monitor, and a third control circuit controlling the transmissivity of the 3rd AMZ to decrease the monitoring result of the third monitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.