Mode converting bent taper with varying widths for an optical waveguide
US10578801B2 · kind B2 · utility
2Cited by
4References
11Claims
0Family size
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Key dates
| Filing date | Jan 29, 2019 |
| Grant date | Mar 3, 2020 |
| Priority date | — |
| Expiry date | Jan 29, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12152
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A SOI bent taper structure is used as a mode convertor. By tuning the widths of the bent taper and the bend angles, almost lossless mode conversion is realized between TE0 and TE1 in a silicon waveguide. The simulated loss is <0.05 dB across C-band. This bent taper can be combined with bi-layer TM0-TE1 rotator to reach very high efficient TM0-TE0 polarization rotator. An ultra-compact (9 μm) bi-layer TM0-TE1 taper based on particle swarm optimization is demonstrated. The entire TM0-TE0 rotator has a loss <0.25 dB and polarization extinction ratio >25 dB, worst-case across the C-band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.