Thermal bleaching of photodarkening in ytterbium-doped fibers

被引：4

作者：

Soderlund, Mikko J. ^{[1
]}

Montiel i Ponsoda, Joan J. ^{[1
]}

Koplow, Jeffrey P. ^{[2
]}

Honkanen, Seppo ^{[1
]}

机构：

[1] Aalto Univ, Sch Sci & Technol, Tietotie 3, Espoo, Finland

[2] Sandia Natl Labs, Livermore, CA 94551 USA

来源：

FIBER LASERS VII: TECHNOLOGY, SYSTEMS, AND APPLICATIONS | 2010年 / 7580卷

关键词：

Ytterbium; photodarkening; color center; bleaching;

D O I：

10.1117/12.842095

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study thermal bleaching of photodarkening-induced loss in ytterbium-doped fibers. Post-irradiation heating of a photodarkened fiber is shown to result in further increase the loss which is attributed to both a permanent increase of loss-inducing color centers and a temperature-dependent broadening of the absorption spectrum. The permanent heat-induced increase of loss is believed to indicate presence of an intermediate energy state in the NIRpho tochemical mechanism for photodarkening. Further, we apply the demarcation energy curve approach to derive the thermal activation energy of the induced defects. For the studied commercial 20-mu m-core-diameter LMA fiber, the energy distribution consists of a single peak, located at 1.3 eV with a FWHM of 0.31 eV.

引用

页数：8

共 19 条

[1] BASU C, C LAS EL EUR QUANT E
[2] Reversible photo-darkening and resonant photobleaching of Ytterbium-doped silica fiber at in-core 977-nm and 543-nm irradiation
Chavez, A. D. Guzman
Kir'yanov, A. V.
Barmenkov, Yu. O.
Il'ichev, N. N.
[J]. LASER PHYSICS LETTERS, 2007, 4 (10) : 734 - 739
[3] Strong UV absorption and visible luminescence in ytterbium-doped aluminosilicate glass under UV excitation
Engholm, M.
Norin, L.
Aberg, D.
[J]. OPTICS LETTERS, 2007, 32 (22) : 3352 - 3354
[4] Improved photodarkening resistivity in ytterbium-doped fiber lasers by cerium codoping
Engholm, M.
Jelger, P.
Laurell, F.
Norin, L.
[J]. OPTICS LETTERS, 2009, 34 (08) : 1285 - 1287
[5] DECAY OF ULTRAVIOLET-INDUCED FIBER BRAGG GRATINGS
ERDOGAN, T
MIZRAHI, V
LEMAIRE, PJ
MONROE, D
[J]. JOURNAL OF APPLIED PHYSICS, 1994, 76 (01) : 73 - 80
[6] Jasapara J., C LAS EL QUANT EL LA
[7] JETSCHKE S, 2009, P SPIE, V7195
[8] Efficient Yb laser fibers with low photodarkening by optimization of the core composition
Jetschke, Sylvia
Unger, Sonja
Schwuchow, Anka
Leich, Martin
Kirchhof, Johannes
[J]. OPTICS EXPRESS, 2008, 16 (20): : 15540 - 15545
[9] Photodarkening in Yb doped fibers:: experimental evidence of equilibrium states depending on the pump power
Jetschke, Sylvia
Unger, Sonja
Roepke, Ulrich
Kirchhof, Johannes
[J]. OPTICS EXPRESS, 2007, 15 (22) : 14838 - 14843
[10] KANNAN S, 1999, OSA TECHNICAL DIGEST, V3

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