Taper shapes for ultralow sidelobe levels in directional coupler filters
US5563970A · kind A · utility
6Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1995 |
| Grant date | Oct 8, 1996 |
| Priority date | — |
| Expiry date | Feb 8, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29334
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical directional coupler filter having at least two guides; an input guide and a coupled guide. The spacing between the guides and hence the interactive strength is tailored so as to provide ultralow sidelobe levels at a narrow spectral bandwidth. A formula has been derived with respect to the tapered shape function of the waveguides in order to arrive at the optimum results.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.