Open AccessSuppression of photo‐darkening effect by Ca additive in Yb‐doped silica glass fibre
Author(s) -
Sugiyama S.,
Fujimoto Y.,
Murakami M.,
Nakano H.,
Sato T.,
Shiraga H.
Publication year - 2013
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2012.4267
Subject(s) - stabiliser , doping , materials science , silica glass , composite material , ion , mineralogy , optics , optoelectronics , chemistry , nanotechnology , organic chemistry , physics
It is found that Ca additive effectively suppresses the photo‐darkening effect in Yb‐doped silica fibre even at 6.0 wt% of high Yb 2 O 3 concentration. Ca ion works as a stabiliser to maintain the Yb 3+ valence state. It is hypothesised that this phenomenon may reflect the local charge balance effect in silica glass. This Yb‐Ca co‐doped silica fibre can be useful for high‐power fibre lasers.