Eye-safe optical fiber transmitter unit
US6804436B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 2002 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Jan 23, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/4297
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An eye-safe optical fiber transmitter unit comprises a laser, an optical port, an optical fiber stub with a fiber core carrying optical radiation emitted by the laser to the optical port. The core is an index-guided core surrounded by cladding. Laser radiation is focussed to a spot on a fiber stub entrance face to increase the coupling efficiency of optical radiation into the fiber core and decrease the radiation coupling efficiency of radiation into the surrounding cladding. The coupling efficiency into the core is a maximum at a particular orientation of the entrance face with respect to a focus axis when the focus spot is on the entrance face. The entrance face is not oriented at this particular orientation, but is angled and/or rotated away from the particular orientation to reduce optical coupling efficiency into the fiber core and cladding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.