Stabilized thermally tunable optical waveguide devices and communication systems employing them
US6438277B1 · kind B1 · utility
23Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1999 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Jun 3, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/0147
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In accordance with the invention, a thermally tunable optical waveguide device is stabilized against ambient changes. Specifically, a feedback signal derived from a temperature-dependent resistance is used to stabilize the device with respect to ambient changes that could otherwise alter the temperature. Specific embodiments include resistance-heated tunable gratings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.