Suppresson of undesirable signal propagation mode(s) downstream of mode converter
US7724995B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2004 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Nov 20, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical device (D) is dedicated to the transformation of the propagation mode of optical signals. This device comprises at least a first mode converter (3) that is supplied with signals that are propagated in a first guided mode and that delivers the signals in a multimode fibre (4) partly in the first guided mode and partly in a second guided more of a higher order that the first. The multimode fibre (4) comprises at least first passive filtering means (R) which have the task of converting the first guided mode into at least one dissipative cladding mode in order to prevent or limit the propagation of the signals in this first guided mode while at the same time authorising the propagation of the signals having the second guided mode in the multimode fibre (4).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.