Optical fiber
US6332053A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 2000 |
| Grant date | Dec 18, 2001 |
| Priority date | — |
| Expiry date | May 5, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/421
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention discloses an optical fiber capable of providing optical connection to a semiconductor laser diode (LD) as a light emitting element at high optical coupling efficiency. An optical fiber (5) for optical coupling efficiency improvement is-coupled, by a fusion joint technique, to an end portion of an optical fiber (2) which is optically connected to a semiconductor LD (3). The optical fiber (5) for optical coupling efficiency improvement has a circular mode field w and the semiconductor LD (3) has an elliptical mode field, wherein the diameter W1 of the fiber (5) is nearly identical to that of the latter field of the semiconductor LD (3) extending in the ellipse's major axis direction. Further, an end portion of the optical fiber 5 for optical coupling efficiency improvement on the side of the semiconductor LD (3) is formed into an approximately wedge-like shape and its endmost portion is formed into a lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.