Compact free-space WDM device with one-sided input/output ports
US7843644B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2007 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | Feb 19, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2937
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Techniques for designing compact free-space optical device with all input/output ports on one side are disclosed. Instead of folding a fiber, a beam folding means is provided to turn a light beam to significantly reduce the size of the device. In one embodiment, there are a first collimator, a second collimator, and a beam folding means to turn a light beam from the first collimator back to the second collimator by two turns so that a first light path from the first collimator to the beam folding means and a second light path from the second collimator to the beam folding means are parallel. A substrate is provided to which the first and second collimators and filters are boned thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.