Tunable electro-absorption modulator
US6665105B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 2001 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Jul 31, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/015
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A tunable modulator includes an epitaxial structure formed on a substrate. The epitaxial structure includes a waveguide for light guiding, generally in form of a ridge, a trench for thermal insulation and an integrated heating element which, when a current is passed therethrough, heats the modulator and in turn changes the effective bandgap. This alters the wavelength that is best modulated resulting in a tunable modulator in accordance with the present invention.Literature[1] Beck Mason, Greg A. Fish, Steven P. DenBaars, Larry A. Coldren, “Widely Tunable Sampled Grating DBR Laser with Integrated Electroabsorption Modulator,” IEEE Photonics Technology Letters, vol. 11, no. 6 pp. Jun. 4-6, 1999 FIG. 4.[2] Lucent/Agere Application Note TN00008 on electro-absorption modulators (EML), May 2000.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.