Optical comb filters used with waveguide, laser and manufacturing method of same
US5699378A · kind A · utility
18Cited by
11References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1996 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Apr 29, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/5045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical filter is formed from at least two gratings (102,103) located in a waveguide region (104) of a` semiconductor optical device (101). Each grating has a multiple peak optical passband. The gratings are spaced apart in the waveguide region and form an optical cavity having a comb-filter characteristic. The gratings may be located in the active region of an optical gain element and in a preferred example are superstructure gratings (SSGs). A number of filters may be joined together in series.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.