Method and apparatus for coupling at least two optical fibers by means of a holographic lens
US4432600A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1981 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | Mar 30, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2848
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a process of coupling optical fibers by means of a holographic lens, and an apparatus for carrying out this process. A holographic lens H.sub.2 is recorded conventionally by utilization of a provisional hologram H.sub.1, by means of two monomodal optical fibers mounted by their respective end pieces in a block used to support the holographic lens. The block has bores, clearly defined in shape and position, into which are introduced the end pieces of monomodal fibers to effect recording of the holographic lens, and in which are fixed the end pieces of multimodal fibers which are to be optically coupled after withdrawal of the monomodal fibers. The process and apparatus of the invention enables the speckling phenomenon, i.e., that of non-uniform distribution of light in the transmitted beams, to be suppressed, improving the efficiency of the holographic lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.