Optical time division demultiplexing apparatus and demultiplexed signal switching method as well as optical time division multiplex transmission system
US6118564A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1997 |
| Grant date | Sep 12, 2000 |
| Priority date | — |
| Expiry date | Jul 15, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q11/0001
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The invention provides an optical time division demultiplexing apparatus which can perform optical time division demultiplexing while compensating for an operating point drift of an optical time division multiplex signal. The optical time division demultiplexing apparatus includes a clock signal generation element for generating a clock signal for optical time division demultiplexing processing of a received optical signal, and an optical switch for time division demultiplexing the optical signal based on the clock signal from the clock signal generation element. The optical time division demultiplexing apparatus further includes an operating point stabilization control circuit for superposing a predetermined low frequency signal set in advance on the clock signal for optical time division demultiplexing processing to be supplied to the optical switch and controlling the clock signal to be supplied to the optical switch based on a phase difference between a component of the predetermined low frequency signal of the optical signal after time division demultiplexing processing by the optical switch and a component of the predetermined low frequency signal set in advance so that an op…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.