Optical coupling system that reduces back reflection and improves mode matching in forward optical coupling using perturbations at a reflective surface
US9841571B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 27, 2017 |
| Grant date | Dec 12, 2017 |
| Priority date | — |
| Expiry date | Jan 27, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical coupling system and method are provided for coupling light from a light source into an optical fiber that reduce back reflection of light into the light source and provide controlled launch conditions that improve forward optical coupling. The optical coupling system comprises at least one flat surface having perturbations formed therein over at least a portion of the flat surface that intersects an optical pathway. The perturbations have a lateral width and a height that are preselected to increase forward optical coupling efficiency and to decrease back reflection of the light beam from the optical fiber end face into the light source. The perturbations improve forward optical coupling by creating a complex light beam shape that is preselected to better match a spatial and angular distribution of a plurality of light modes of the optical fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.