Photodarkening and photobleaching of an ytterbium-doped silica double-clad LMA fiber

Manek-Hönninger, Inka; Boullet, Johan; Cardinal, Thierry; Guillen, F.; Ermeneux, S.; Podgórski, Maciej; Doua, R. Bello; Salin, F.

doi:10.1364/oe.15.001606

Cited by 134 publications

(115 citation statements)

References 13 publications

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“…These findings are consistent with proposals by other teams [2,[15][16][17], notably the Engholm's [15][16][17] according to which PD is due to an Yb 3+ to Yb 2+ conversion, again with hole trapping, upon absorption of a UV photon (resulting from the deexcitation of several excited Yb 3+ ions) into the charge transfer (CT) bands of Yb 3+ ions. Darkening can be bleached by photons at 3.49 eV (355 nm) [1], 2.28 eV (543 nm) [2], 1.36 eV (915 nm) [3], and 1,27 eV (980 nm, Duchez's work). If photo-bleaching (PB) results from the photo-ionization (PI) of trapped holes, this variety of energies can suggest that PI takes place between localized trapped-hole states in the glass band-gap and a continuum, namely the valence band (VB).…”

Section: Modelmentioning

confidence: 99%

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A physical model of the photo- and radiation-induced degradation of ytterbium-doped silica optical fibres

Mady

Duchez

Mebrouk

et al. 2014

AIP Conference Proceedings

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International audienceWe propose a model to describe the photo-or/and the radiation-induced darkening of ytterbium-doped silica optical fibers. This model accounts for the well-established experimental features of photo-darkening. Degradation behaviors predicted for fibers pumped in harsh environments are also fully confirmed by experimental data reported in the work by Duchez et al. (this proceeding), which gives a detailed characterization of the interplay between the effects of the pump and those of a superimposed ionizing irradiation (actual operation conditions in space-based applications for instance). In particular, dependences of the darkening build-up on the pump power, the total ionizing dose and the dose rate are all correctly reproduced. The presented model is a 'sufficient' one, including the minimal physical ingredients required to reproduce experimental features. Refinements could be proposed to improve, e.g., quantitative kinetics

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Section: Modelmentioning

confidence: 99%

“…Ytterbium-doped silica optical fibers (YDF) can be damaged by pump photons (photo-darkening, PD) [1][2][3][4][5][6] and possibly by external ionizing radiation (radiation-induced darkening, RD) [7][8][9]. In both cases, darkening results from a large excess optical absorption that develops from ultra-violet up to near infra-red ranges.…”

Section: Introductionmentioning

confidence: 99%

A physical model of the photo- and radiation-induced degradation of ytterbium-doped silica optical fibres

Mady

Duchez

Mebrouk

et al. 2014

AIP Conference Proceedings

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Section: Photo-darkening Phenomena Of Nano-engineering Fibersmentioning

confidence: 99%

“…PD deteriorates the performance of fiber lasers or amplifiers (Hönninger et al, 2007;Morasse et al, 2007). Such phenomenon is initiated by the high Yb inversion (Koponen et al, 2006;Hönninger et al, 2007). The generation of color centers are responsible for the induced excess loss in the UV/VIS/IR wavelength range and was attributed to a photo-ionization process powered by the energy of excited Yb ions.…”

Section: Photo-darkening Phenomena Of Nano-engineering Fibersmentioning

confidence: 99%

“…PD in Yb doped fibers can also be induced by 488 nm irradiation (Yoo et al, 2007). Several measurement techniques to investigate the temporal and spectral characteristics of the loss evolution were developed (Koponen et al, 2006;Hönninger et al, 2007;Morasse et al, 2007;Yoo et al, 2007;Jasapara et al, 2006;Shubin et al, 2006;Koponen et al, 2007). Cladding pumping is advantageous, because a homogeneous Yb inversion can be achieved, independent of the core diameter and adjustable in a wide range with moderate pump powers.…”

Section: Photo-darkening Phenomena Of Nano-engineering Fibersmentioning

confidence: 99%

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Fabrication of Large Core Yb2O3 Doped Phase Separated Yttria-Alumino Silicate Nano-Particles Based Optical Fiber for Use as Fiber Laser

Paul¹,

Kir’yanov²,

Bysakh³

et al. 2012

Selected Topics on Optical Fiber Technology

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Reversible photo-darkening and resonant photo-bleaching of Ytterbium-doped silica fiber at in-core 977-nm and 543-nm irradiation

et al. 2007

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Abstract:We report experimental results showing novel features in photo-darkening and photo-bleaching of a heavily-doped Ytterbium silica fiber exposed to in-core 977-nm and 543-nm irradiation. It is shown that pumping of the fiber at the resonant 977-nm wavelength leads to an increase of absorption in the spectrally wide range (400-1000 nm, photo-darkening) and a simultaneous decrease of the resonant (Yb 3+ ) absorption coefficient near ∼ 1 µm (resonant photo-bleaching). Such a character of the Ytterbium fiber spectra transformations allows us to propose that they are a signature of the 977-nm light-induced Yb 3+ → Yb 2+ conversion process, with the spectrally wide absorption, or photo-darkening, to arise owing to the Yb 2+ centers formation and the resonant photo-bleaching to stem from the corresponding decrease of Yb 3+ ions concentration. It is as well demonstrated that an exposure of the Ytterbium fiber, where the aforementioned transformations have occurred, to the 543-nm light results in a partial return of the initial fiber propertiesbleaching of the spectrally wide excess loss in the visible and increasing of the resonant 977-nm (Yb 3+ ) absorption peak. Therefore, we reveal a reverse process, Yb 2+ → Yb 3+ , possibly taking place in the last case.

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Photodarkening and photobleaching of an ytterbium-doped silica double-clad LMA fiber

Cited by 134 publications

References 13 publications

A physical model of the photo- and radiation-induced degradation of ytterbium-doped silica optical fibres

A physical model of the photo- and radiation-induced degradation of ytterbium-doped silica optical fibres

Fabrication of Large Core Yb2O3 Doped Phase Separated Yttria-Alumino Silicate Nano-Particles Based Optical Fiber for Use as Fiber Laser

Reversible photo-darkening and resonant photo-bleaching of Ytterbium-doped silica fiber at in-core 977-nm and 543-nm irradiation

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