Optical drop circuit having group delay compensation
US6201907A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 1999 |
| Grant date | Mar 13, 2001 |
| Priority date | — |
| Expiry date | Mar 25, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29394
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to multi-wavelength filtering devices and more particularly to a multi-channel multiplexer/demultiplexor using at least one multi-port optical circulator and a plurality of Bragg optical fiber gratings or other wavelength selective means. Advantageously a drop or add/drop optical circuit including the combination of a Bragg grating providing a strong reflective response for substantially completely separating a single channel of a band of wavelengths from a plurality of other channels in a multi-channel signal, with a Bragg grating of lower reflective response which is capable of providing group delay compensation to lessen the effects of group delay introduced by the strong Bragg grating with isolation between the Bragg gratings provides a device for accurately and efficiently separating channels from a multiple channel signal with low loss.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.