Transverse mode transformer
US6377726B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 29, 2000 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | Feb 29, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29376
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to apparatus and methods for transforming a spatial mode of an optical signal. The apparatus includes an optical phase element for imparting a predetermined spatially selective phase delay to the optical signal, and a mask in optical communication with the optical phase element. The mask, in one embodiment, includes an optically attenuating region disposed in a predetermined spatial pattern. In one aspect of the invention, the optical signal is transformed from a first spatial mode to a second spatial mode. In another aspect of the invention, the mask includes an absorbing material arranged in a predetermined spatial pattern. In yet another aspect of the invention, the mask includes a scattering material arranged in a predetermined spatial pattern. The invention also relates to a method for transforming a spatial mode of an optical signal. The method includes the step of receiving the optical signal having a first spatial mode with an intensity distribution and a phase. The method further includes the steps of selectively spatially attenuating the intensity distribution of the first spatial mode of the optical signal, selectively spatially delaying the phase o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.