Polarization compensated waveguide grating router
US5623571A · kind A · utility
34Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1995 |
| Grant date | Apr 22, 1997 |
| Priority date | — |
| Expiry date | Aug 29, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/126
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A polarization compensated waveguide grating router is formed by reducing the thickness of the cladding material deposited over segments of waveguide cores to be on the order of the height of the vertical extension of the optical field of the waveguide. The resulting "air-patch" segments increase the birefringence in the patch segments of the waveguides. By using an air-patch length which is inversely proportional to the length of each waveguide, the correct phase relationship can be maintained between the different waveguides to produce an InP-based router which is polarization independent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.