Reduced element optical add-drop multiplexer
US7039271B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2003 |
| Grant date | May 2, 2006 |
| Priority date | — |
| Expiry date | Feb 12, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29364
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A low cost compact integrated 4-port single-channel OADM with improved optical isolation and low insertion loss is provided in which a 4-fiber pigtail includes I/O fibers and add/drop fibers, which are arranged on the same side of the multiplexer. A lens, filter and reflector are arranged in a double-pass configuration to route the optical signals to and from the appropriate fibers. The fibers are suitably arranged with the input and drop fibers at the corners of one diagonal and the output and add fibers at the corners of the crossing diagonal with the midpoints of the diagonals intersecting. Furthermore, a point halfway between the input and output fibers suitably lies at or near the central axis of the collimating lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.