Waveguide pair with cladding
US6044192A · kind A · utility
22Cited by
10References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 12, 1999 |
| Grant date | Mar 28, 2000 |
| Priority date | — |
| Expiry date | Apr 12, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12169
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A planar waveguide structure has, supported on a lower refractive index buffer layer (5), a pair of optical cores (1, 2) that, over at least a portion of their length, are closely spaced. These cores are covered with a layer (6) of cladding material comprising boron and phosphorus doped silica glass deposited by PECVD as a succession of individually annealed layers in order to minimize the incidence of voids in the deposit between the cores.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.