Waveguide for thermo optic device
US7720341B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2008 |
| Grant date | May 18, 2010 |
| Priority date | — |
| Expiry date | Mar 13, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/15
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A waveguide and resonator are formed on a lower cladding of a thermo optic device, each having a formation height that is substantially equal. Thereafter, the formation height of the waveguide is attenuated. In this manner, the aspect ratio as between the waveguide and resonator in an area where the waveguide and resonator front or face one another decreases (in comparison to the prior art) thereby restoring the synchronicity between the waveguide and the grating and allowing higher bandwidth configurations to be used. The waveguide attenuation is achieved by photomasking and etching the waveguide after the resonator and waveguide are formed. In one embodiment the photomasking and etching is performed after deposition of the upper cladding. In another, it is performed before the deposition. Thermo optic devices, thermo optic packages and fiber optic systems having these waveguides are also taught.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.