Incoherent composite multi-emitter laser for an optical arrangement
US4603421A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1982 |
| Grant date | Jul 29, 1986 |
| Priority date | — |
| Expiry date | Nov 24, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/4056
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multi-emitter extended source solid state laser designed to omit light beams at multiple wavelengths within a narrow total spectral bandwidth, that is, a relatively incoherent composite output beam of narrow total spectral bandwidth, is used as the input to a multimode optical fiber of an optic communications link or network. By providing an incoherent composite laser input beam to the fiber, modal noise due to coherence effects are virtually eliminated so that such effects no longer affect network performance. In addition, because the source is extended, a more uniform illumination of the fiber face is achieved. An exemplary multi-emitter laser would consist of an array of simultaneously driven emitting regions or cavities which operate in multiple longitudinal modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.