Patent · US Active

Ultra short pulse fiber pre-amplifier system for large-core fibers

US10998688B2 · kind B2 · utility

0Cited by

5References

19Claims

0Family size

Assignee

TRUMPF LASER GMBH · DE

Inventors

Dirk Sutter · Mountain View, US
Alexander Killi · Trossingen, DE
Aleksander Budnicki · Gundelfingen, DE
Florian Jansen · Villingen-Schwenningen, DE

Key dates

Filing date	Sep 20, 2018
Grant date	May 4, 2021
Priority date	—
Expiry date	Sep 20, 2038

Classification

Technology area (CPC H)Electricity
CPC primaryH01S3/1618
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A fiber amplification system is provided for amplifying a laser pulse signal, e.g., an oscillator signal of an oscillator device. The fiber amplification system includes a fiber pre-amplification system having a short, fundamental-mode and step-index fiber configured to pre-amplify the laser pule signal to generate a seed signal and a main amplification system having a large core fiber configured to amplify the seed signal. The short, fundamental-mode step-index fiber can have a length no longer than about 30 cm, and a mode field diameter no less than about 30 μm, e.g., in a range from 30 μm to 60 μm, as well as a high doping concentration needed to provide an absorption length no more than about 30 cm, for providing the seed signal for the large core fiber with low non-linearity.

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