Mode coupler between low index difference waveguide and high index difference waveguide
US6631225B2 · kind B2 · utility
45Cited by
4References
42Claims
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Key dates
| Filing date | Apr 24, 2001 |
| Grant date | Oct 7, 2003 |
| Priority date | — |
| Expiry date | Jul 9, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/305
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A mode coupler that enables low-loss coupling between optical modes of two waveguides with different index difference. The mode size and the effective index are gradually changed between two waveguides to gradually transform the mode shape, size, and speed with minimum power loss. The mode coupler is useful for coupling the mode of an optical fiber waveguide with low index difference to the mode of a planar high index difference waveguide, and vice versa.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.