Method to optimize a light coupling waveguide
US9739950B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2013 |
| Grant date | Aug 22, 2017 |
| Priority date | — |
| Expiry date | Nov 27, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29397
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention concerns a method for constructing a light coupling system wherein a grating is manufactured on the surface of a multimode waveguide and defines the entrance of the waveguide for an incident light beam, said grating comprising a repetition of patterns. The grating is defined by a set of parameters comprising: •grating period (P), separating two adjacent patterns, •grating depth (d) between the highest and the lowest point of the pattern, •incident angle mean value (θ) of the incident light with respect to the waveguide. The method comprises a step of optimization of the set of parameters to obtain an optimized second set of parameters, in order to obtain a transmission efficiency (Ce) of the incident light into said waveguide for the first or the second diffractive order exceeding 35% for unpolarized light, or exceeding 50% for polarized light, at a given wavelength of the incident light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.