M Engholm

Summary

Country: Sweden

Publications

  1. ncbi request reprint Strong UV absorption and visible luminescence in ytterbium-doped aluminosilicate glass under UV excitation
    M Engholm
    Department of Information, Technology and Media, Physical Electronics and Photonics, Mid Sweden University, SE 851 70 Sundsvall, Sweden
    Opt Lett 32:3352-4. 2007
  2. ncbi request reprint Comment on "Photodarkening in Yb-doped aluminosilicate fibers induced by 488 nm irradiation"
    M Engholm
    Acreo FiberLab, Hudiksvall, Sweden
    Opt Lett 33:1216; discussion 1217-8. 2008
  3. ncbi request reprint Preventing photodarkening in ytterbium-doped high power fiber lasers; correlation to the UV-transparency of the core glass
    M Engholm
    Department of Information, Technology and Media, Physical Electronics and Photonics, Mid Sweden University, SE 851 70 Sundsvall, Sweden
    Opt Express 16:1260-8. 2008
  4. doi request reprint Experimental evidence for the formation of divalent ytterbium in the photodarkening process of Yb-doped fiber lasers
    S Rydberg
    Mid Sweden University, S 851 70 Sundsvall, Sweden
    Opt Express 21:6681-8. 2013

Collaborators

  • S Rydberg

Detail Information

Publications4

  1. ncbi request reprint Strong UV absorption and visible luminescence in ytterbium-doped aluminosilicate glass under UV excitation
    M Engholm
    Department of Information, Technology and Media, Physical Electronics and Photonics, Mid Sweden University, SE 851 70 Sundsvall, Sweden
    Opt Lett 32:3352-4. 2007
    ..The findings are important to explain induced optical losses (photodarkening) in high-power fiber lasers...
  2. ncbi request reprint Comment on "Photodarkening in Yb-doped aluminosilicate fibers induced by 488 nm irradiation"
    M Engholm
    Acreo FiberLab, Hudiksvall, Sweden
    Opt Lett 33:1216; discussion 1217-8. 2008
    ..Lett.32, 1626 (2007)]. The strong 230 nm absorption band is actually a charge-transfer band corresponding to the transfer of an electron from nearby oxygen ligands to the ytterbium ion and not related to ODCs...
  3. ncbi request reprint Preventing photodarkening in ytterbium-doped high power fiber lasers; correlation to the UV-transparency of the core glass
    M Engholm
    Department of Information, Technology and Media, Physical Electronics and Photonics, Mid Sweden University, SE 851 70 Sundsvall, Sweden
    Opt Express 16:1260-8. 2008
    ..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...
  4. doi request reprint Experimental evidence for the formation of divalent ytterbium in the photodarkening process of Yb-doped fiber lasers
    S Rydberg
    Mid Sweden University, S 851 70 Sundsvall, Sweden
    Opt Express 21:6681-8. 2013
    ..A concentration decrease in Yb(3+) could also be observed for the UV irradiated preform. The findings contribute to an increased understanding of the kinetic processes related to photodarkening in Yb-doped high power fiber lasers...