OSA's Digital Library

Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 2 — Jan. 21, 2008
  • pp: 1260–1268

Preventing photodarkening in ytterbium-doped high power fiber lasers; correlation to the UV-transparency of the core glass

M. Engholm and L. Norin  »View Author Affiliations

Optics Express, Vol. 16, Issue 2, pp. 1260-1268 (2008)

View Full Text Article

Enhanced HTML    Acrobat PDF (132 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



Photodarkening experiments are performed on ytterbium-doped silicate glass samples. A strong charge-transfer (CT) absorption band near 230nm in aluminosilicate glass is found to be correlated to the mechanism of induced color center formation. Excitation into the CT-absorption band generates similar color centers as observed in ytterbium-doped fiber lasers under 915nm high power diode pumping. The position of the CT-absorption band is compositional dependent and is shifted to shorter wavelengths in ytterbium doped phosphosilicate glass. Very low levels of photodarkening is observed for the ytterbium doped phosphosilicate glass composition under 915nm high power diode pumping. Possible excitation routes to reach the CT-absorption band under 915nm pumping are discussed.

© 2008 Optical Society of America

OCIS Codes
(140.3510) Lasers and laser optics : Lasers, fiber
(160.5690) Materials : Rare-earth-doped materials
(260.5210) Physical optics : Photoionization
(140.3615) Lasers and laser optics : Lasers, ytterbium

ToC Category:
Lasers and Laser Optics

Original Manuscript: October 17, 2007
Revised Manuscript: January 7, 2008
Manuscript Accepted: January 10, 2008
Published: January 16, 2008

M. Engholm and L. Norin, "Preventing photodarkening in ytterbium-doped high power fiber lasers; correlation to the UV-transparency of the core glass," Opt. Express 16, 1260-1268 (2008)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. J. Koponen, M. Söderlund, H. Hoffman, D. Kliner, and J. Koplow, "Photodarkening measurements in large mode are fibers," Proc. SPIE 6453, 64531E (2006). [CrossRef]
  2. B. Morasse, S. Chatigny, E. Gagnon, C. Hovington, J.-P. Martin, and J.-P. de Sandro, "Low photodarkening single cladding ytterbium fibre amplifier," Proc. SPIE 6453 (2007). [CrossRef]
  3. M. Engholm, L. Norin, and D. Åberg, "Strong UV-absorption and visible luminescence in ytterbium-doped aluminosilicate glass under UV-excitation," Opt. Lett. 32, 3352-3354 (2007). [CrossRef] [PubMed]
  4. G. Blasse, "The ultraviolet absorption bands of Bi3+ and Eu3+ in oxides," J. Solid State Chem. 4, 52 (1972). [CrossRef]
  5. L. Li and S. Zhang, "Dependence of charge transfer energy on crystal structure and composition in Eu3+-doped compounds," J. Phys. Chem. B 110, 21438-21443 (2006). [CrossRef] [PubMed]
  6. L. van Pieterson, M. Heeroma, E. de Heer, and A. Meijerink, "Charge transfer luminescence of Yb3+," J. Lumin. 91, 177-193 (2000). [CrossRef]
  7. G. Blasse and B. Grabmaier, eds., Luminescent Materials (Springer-Verlag, Berlin Heidelberg, 1994), p. 83.
  8. M. Cohen and L. Makar, "Models for color centers in smokey quartz," Phys. Status Solidi A 73, 593-596 (1982). [CrossRef]
  9. S. Girard, E. Régnier, A. Boukenter, Y. Ouerdane, J.-P. Meunier, and D. Hamdani, "Gamma and UV radiationinduced color centers in optical fibers," Mat. Sci. Forum 480-481, 323-328 (2005).
  10. P. Ebeling, D. Ehrt, and M. Friedrich, "X-ray induced effects in phosphate glasses," Opt. Mater. 20, 101-111 (2002). [CrossRef]
  11. J. Hölsä, M. Lastusaari, M. Marysko, and M. Tukia, "A few remarks on the simulation and use of crystal field energy level schemes of the rare earth ions," J. Solid State Chem. 178, 435-440 (2005). [CrossRef]
  12. C. Pedrini, "Electronic processes in rare earth activated wide gap materials," Phys. Status Solidi A 2, 185-194 (2005). [CrossRef]
  13. T. Ishii, "First-principles calculations for the cooperative transitions of Yb3+ dimer clusters in Y3Al5O12 and Y2O3 crystals," J. Chem. Phys. 122, 024705 (2005). [CrossRef] [PubMed]
  14. H. You and M. Nogami, "Three-photon-excited fluorescence of Al2O3-SiO2 glass containing Eu3+ ions by femtosecond laser irradiation," Appl. Phys. Lett. 84, 2076-2078 (2004). [CrossRef]
  15. H. You, T. Hayakawa, and M. Nogami, "Upconversion luminescence of Al2O3-SiO2:Ce3+ glass by femtosecond laser irradiation," Appl. Phys. Lett. 85, 3432-3434 (2004). [CrossRef]
  16. S. Yoo, C. Basu, A. Boyland, C. Sones, J. Nilsson, J. Sahu, and D. Payne, "Photodarkening in Yb-doped aluminosilicate fibers induced by 488nm irradiation," Opt. Lett. 32, 1626-1628 (2007). [CrossRef] [PubMed]
  17. A changed oxidation state of an Mn+ rare-earth-ion caused by ionizing irradiation is often denoted as (Mn+)+ or (Mn+)- instead of M(n+1)+ or M(n-1)+ respectively. This is because the local environment may be different compared to that formed initially in the glass under e.g. heat treatment. This may result in small shifts of the observed absorption bands. The formal charge of the RE-ion is nevertheless the same and we will use the notation M(n+1)+ or M(n-1)+ for an ion with a changed oxidation state.

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited