Influence of cerium ions on thermal bleaching of photo-darkened ytterbium-doped fibers

doi:10.1007/s12200-018-0832-y

Front. Optoelectron.

2018, Vol. 11

Issue (4) : 394-399 https://doi.org/10.1007/s12200-018-0832-y

RESEARCH ARTICLE

Influence of cerium ions on thermal bleaching of photo-darkened ytterbium-doped fibers

Xiaoxia LIU¹, Chaoping LIU², Gui CHEN², Haiqing LI²(

)

¹. College of Life Science and Chemistry, Wuhan Donghu University, Wuhan 430074, China
². Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China

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Abstract

We studied the influence of cerium (Ce) ions on photo-darkening (PD) behavior in ytterbium/aluminum (Yb/Al) co-doped silica fibers at room and elevated temperatures. Low levels of PD was observed for Ce co-doped Yb/Al fiber. And the Yb/Al co-doped fiber was completely bleached at ~600°C. The addition of Ce ions as co-dopant can significantly lower the initial recovery and complete bleaching temperatures. The complete recovery temperature is ~ 450°C and ~400°C for Yb/Al/Ce low fiber and Yb/Al/Ce high fiber respectively. More importantly, Ce co-doping in Yb/Al fiber also decreases the heat-induced loss.

Keywords photo-darkening (PD) ytterbium/aluminum (Yb/Al) fiber cerium (Ce) ions thermal bleaching

Corresponding Author(s): Haiqing LI

Just Accepted Date: 02 July 2018 Online First Date: 25 July 2018 Issue Date: 21 December 2018

Cite this article:

Xiaoxia LIU,Chaoping LIU,Gui CHEN, et al. Influence of cerium ions on thermal bleaching of photo-darkened ytterbium-doped fibers[J]. Front. Optoelectron., 2018, 11(4): 394-399.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-018-0832-y
https://academic.hep.com.cn/foe/EN/Y2018/V11/I4/394

Tab.1 Chemical core compositions of the fibers are provided. Concentrations are in wt.% of oxide

Fig.1 Schematic of the experimental setup

Fig.2 (a) PD induced fiber absorption spectra after 420 min illumination; (b) PD induced loss as a function of exposure time at 702 nm and adjustment by stretched exponentials (

α e q

equilibrium value of the induced loss)

Fig.3 Absorption spectra at different temperatures for (a) Yb/Al fiber, (b) Yb/Al/Ce low fiber, (c) Yb/Al/Ce high fiber. The insets of (a), (b), (c) display an increase of excess loss between 650 and 850 nm

Fig.4 Absorption spectra of Yb/Al/Ce low fiber

Fig.5 Variation of PD induced loss by thermal bleaching at 702 nm for Yb/Al fiber, Yb/Al/Ce low fiber and Yb/Al/Ce high fiber

Fig.6 Evolution of PD induced loss by the illumination of 915 nm LD and thermal bleaching at 702 nm for Yb/Al/Ce low fiber

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