Patent · US Active

High power metal clad mode absorber

US9435945B2 · kind B2 · utility

5Cited by

2References

20Claims

0Family size

Assignee

IPG PHOTONICS CORPORATION · US

Inventors

Valentin Gapontsev · Worcester, US
Valentin Fomin · Münster, DE
Mikhail Abramov · Oxford, US
Anton Ferin · Burbach, DE

Key dates

Filing date	Jun 18, 2014
Grant date	Sep 6, 2016
Priority date	—
Expiry date	Jun 18, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH01S3/094007
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A clad absorber unit is provided on a passive fiber of a high power fiber laser system and operative to trap and remove high order modes propagating along the clad of the passive fiber. The mode absorber has a composition made from one or more liquid metals and alloys thereof which are placed in the opening formed in the sheath of the passive fiber. The composition is configured to remove from the cladding the MM light having a predetermined light power which heats the composition at a temperature lower than a threshold temperature at which the absorber may be damaged.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.