Passive method and apparatus for inducing mode conversion
US7289688B2 · kind B2 · utility
15Cited by
3References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2004 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Jan 11, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/126
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A waveguide for use in polarization mode converters and polarization modulators using extrinsic strain to prerotate the principal axes and control birefringence is disclosed herein. The invention relates to the orienting of principal propagation axes in an optical waveguide by pre-stressing the waveguide, using an extrinsic stress, to re-orient the principal propagation axes from an unstressed orientation to a substantially ideal orientation. The waveguide is preferably stressed by an extrinsic strain inducer which applies a shear force to the waveguide to induce anisometry in the waveguide structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.