Method to reduce warpage and polarization sensitivity of planar devices
US6418261B1 · kind B1 · utility
2Cited by
3References
26Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 24, 2000 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Jul 24, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/122
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical device is provided including a substrate having an underclad layer, a core layer, and a pair of overclad layers deposited thereon. The substrate has a first coefficient of thermal expansion. The underclad layer has a first index of refraction. The first overclad layer has an index of refraction which is approximately equal to the first index of refraction. The second overclad layer has a coefficient of thermal expansion which is greater than the first coefficient of thermal expansion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.