Multipass multiphoton absorption method and apparatus
US7166409B2 · kind B2 · utility
11Cited by
102References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2001 |
| Grant date | Jan 23, 2007 |
| Priority date | — |
| Expiry date | Dec 31, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/2053
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of increasing the efficiency of a multiphoton absorption process and apparatus. The method includes: providing a photoreactive composition; providing a source of sufficient light for simultaneous absorption of at least two photons; exposing the photoreactive composition to at least one transit of light from the light source; and directing at least a portion of the first transit of the light back into the photoreactive composition using at least one optical element, wherein a plurality of photons not absorbed in at least one transit are used to expose the photoreactive composition in a subsequent transit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.