Ultra-high power single mode fiber laser system with non-uniformly configure fiber-to-fiber rod multimode amplifier
US9667023B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2014 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | Mar 6, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/09415
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A high power fiber laser system includes a booster winch is configured as a fiber amplifier extending over free space, pump source and laser head including a reflective element which receives pump light and reflects toward the output end of the booster in a counter signal-propagating direction. The booster is configured with concentric and coextending frustoconically shaped (“MM”) core and cladding around the core. The core includes a mode transition region expanding between small diameter SM input and large diameter MM output core ends and configured so that amplification of high order modes is substantially suppressed as a single mode (“SM”) signal light propagates from the input to output core ends. The laser head receives output ends of respective pump light delivery fibers and signal fiber, respectively. The pump source is structured with a plurality of independent sub pumps arranged around the booster. The laser head supports a segmented mirror configured to reflect pump lights from respective pump sub-sources to the output end of the booster in a counter propagating direction, wherein the booster is configured to emit the amplified signal light reaching up to MW power levels…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.