Integrated optic tunable filters and their methods of fabrication and use
US5889900A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 16, 1997 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | May 16, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/055
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Integrated optic tunable filters (IOTF) which for operation in many different wavelength ranges with different spectral properties. The IOTFs have one or more stages and/or channels formed in birefringent substrates and operate via polarization interferometric effects. Manufacture is via the use of variants of well-known processes used for making high speed integrated optic modulators. The IOTFs are for use in fiber-optic systems, although they can also be implemented in optic systems which are not fiber-optic. Other applications include wavelength division multiplexing, spectral analysis, and source output conditioning. Filtering may be active through the use of externally applied heat, stress, or electric fields.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.