Investigation of multipass Yb-doped fiber amplifiers

We investigated both numerically and experimentally single-pass, two-pass, and four-pass Yb-doped core-pumped fiber amplifier configurations and compared their performance with respect to achievable pump-to-signal conversion efficiency. Despite numerical calculations predicting the highest efficienc...

Full description

Saved in:
Bibliographic Details
Published in:Applied optics (2004) 2021-11, Vol.60 (33), p.10332
Main Authors: Želudevičius, Julijanas, Dubosas, Giedrius, Regelskis, Kęstutis
Format: Article
Language:English
Subjects:
Amplification
Amplifiers
Configuration management
Doped fibers
Efficiency
High gain
Numerical prediction
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We investigated both numerically and experimentally single-pass, two-pass, and four-pass Yb-doped core-pumped fiber amplifier configurations and compared their performance with respect to achievable pump-to-signal conversion efficiency. Despite numerical calculations predicting the highest efficiency in the four-pass setup, an experimentally highest conversion efficiency of 77% was achieved in the two-pass setup and only 49% in the four-pass setup. Reduced performance of the experimental four-pass fiber amplifier configuration was caused by excess coupling losses, which do not impose a fundamental limitation. At the same time, the four-pass fiber amplifier configuration demonstrated advantageous characteristics of high gain using shorter length of active fiber and lower noise figure compared with other tested configurations.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.443529