Magnus Engholm
Seniorforskare|Senior Researcher
- Tjänstetitel: Seniorforskare
- Akademisk titel: Docent
- Telefon arbete: +46 (0)10-1428737
- E-postadress: magnus.engholm@miun.se
- Ort: Sundsvall
Forskningsprojekt
Avslutade
IFUS – Innovation oriented research and education within sensor technology
LEAP - Large-area Energy Application Platform
Skalbar materialprocess för tillverkning av nya avancerade pappersprodukter (förstudie)
STORE - lagring av elektrisk energi
Utveckling av innovationer inom fiberoptik för industriella tillämpningar
Publikationer
Artiklar i tidskrifter
Artiklar, forskningsöversikter
Doktorsavhandlingar, sammanläggningar
Konferensbidrag
Manuskript
Artiklar i tidskrifter
Meehan, B. , Pietros, A. R. , Chen, C. -. , Hawkins, T. W. , Engholm, M. , Dragic, P. D. , Digonnet, M. J. F. & Ballato, J. (2024). Impact of Yb2+ on the anti-Stokes fluorescence cooling performance of Yb-doped silica fibers. Optical Materials Express, vol. 14: 8, ss. 2095-2111.
Dahlström, C. , Duan, R. , Eivazi, A. , Magalhães, S. , Alves, L. , Engholm, M. , Svanedal, I. , Edlund, H. & et al. (2024). Stacking self-gluing cellulose II films : A facile strategy for the formation of novel all-cellulose laminates. Carbohydrate Polymers, vol. 344
Vigneron, P. , Meehan, B. , Cahoon, M. A. , Hawkins, T. W. , Ballato, J. , Dragic, P. D. , Engholm, M. , Boilard, T. & et al. (2022). Anti-Stokes fluorescence cooling of nanoparticle-doped silica fibers. Optics Letters, vol. 47: 10, ss. 2590-2593.
Balliu, E. , Engholm, M. , Digonnet, M. J. F. & Nilsson, H. (2022). Quasi‐cw pumping of a single‐frequency fiber amplifier for efficient shg in ppln crystals with reduced thermal load. Applied Sciences, vol. 12: 1
Balliu, E. , Engholm, M. , Digonnet, M. J. F. , Coetzee, R. S. , Elgcrona, G. & Nilsson, H. (2021). Compact single-frequency mopa using a silica fiber highly doped with yb3+. Applied Sciences, vol. 11: 21
Hawkins, T. W. , Dragic, P. D. , Yu, N. , Flores, A. , Engholm, M. & Ballato, J. (2021). Kilowatt power scaling of an intrinsically low Brillouin and thermo-optic Yb-doped silica fiber. Journal of the Optical Society of America. B, Optical physics, vol. 38: 12, ss. F38-F49.
Engholm, M. , TUGGLE, M. , KUCERA, C. , HAWKINS, T. , DRAGIC, P. & BALLATO, J. (2021). On the origin of photodarkening resistance in Yb-doped silica fibers with high aluminum concentration. Optical Materials Express, vol. 11: 1, ss. 115-126.
Knall, J. M. , Engholm, M. , Boilard, T. , Bernier, M. & Digonnet, M. J. F. (2021). Radiation-Balanced Silica Fiber Amplifier. Physical Review Letters, vol. 127: 1
Knall, J. , Engholm, M. , Boilard, T. , Bernier, M. , Vigneron, P. -. , Yu, N. , Dragic, P. D. , Ballato, J. & et al. (2021). Radiation-balanced silica fiber laser. Optica, vol. 8: 6, ss. 830-833.
Knall, J. , Engholm, M. , Ballato, J. , Dragic, P. D. , Yu, N. & Digonnet, M. J. F. (2020). Experimental comparison of silica fibers for laser cooling. Optics Letters, vol. 45: 14, ss. 4020-4023.
Knall, J. , Vigneron, P. , Engholm, M. , Dragic, P. D. , Yu, N. , Ballato, J. , Bernier, M. & Digonnet, M. J. F. (2020). Laser cooling in a silica optical fiber at atmospheric pressure. Optics Letters, vol. 45: 5, ss. 1092-1095.
Balliu, E. , Boetti, N. G. , Pugliese, D. , Lousteau, J. , Engholm, M. , Milanese, D. & Nilsson, H. (2020). Single-frequency, pulsed Yb3+-doped multicomponent phosphate power fiber amplifier. Journal of Optics, vol. 22: 11
Engholm, M. , Hammarling, K. , Andersson, H. , Sandberg, M. & Nilsson, H. (2019). A Bio-Compatible Fiber Optic pH Sensor Based on a Thin Core Interferometric Technique. Photonics, vol. 6: 1
Andersson, H. , Šuly, P. , Thungström, G. , Engholm, M. , Zhang, R. , Mašlík, J. & Olin, H. (2019). PEDOT : PSS thermoelectric generators printed on paper substrates. Journal of Low Power Electronics and Applications, vol. 9: 2
Zhang, R. , Hummelgård, M. , Örtegren, J. , Yang, Y. , Andersson, H. , Balliu, E. , Blomquist, N. , Engholm, M. & et al. (2019). Sensing body motions based on charges generated on the body. Nano Energy, vol. 63
Hammarling, K. , Engholm, M. , Andersson, H. , Sandberg, M. & Nilsson, H. (2018). Broad-Range Hydrogel-Based pH Sensor with Capacitive Readout Manufactured on a Flexible Substrate. Chemosensors, vol. 6: 3
Zhang, R. , Engholm, M. , Hummelgård, M. , Andersson, H. , Örtegren, J. & Olin, H. (2018). High-performance transparent and flexible electrodes made by flash-light sintering of gold nanoparticles. ACS Applied Energy Materials, vol. 1: 12, ss. 7191-7198.
Zhang, R. , Hummelgård, M. , Forsberg, V. , Andersson, H. , Engholm, M. , Öhlund, T. , Olsen, M. , Örtegren, J. & et al. (2018). Photoconductivity of acid exfoliated and flash-light-processed MoS2 films. Scientific Reports, vol. 8
Zhang, R. & Engholm, M. (2018). Recent Progress on the Fabrication and Properties of Silver Nanowire-Based Transparent Electrodes. Nanomaterials, vol. 8: 8
Balliu, E. , Andersson, H. , Engholm, M. , Öhlund, T. , Nilsson, H. & Olin, H. (2018). Selective laser sintering of inkjet-printed silver nanoparticle inks on paper substrates to achieve highly conductive patterns. Scientific Reports, vol. 8: 1
Hammarling, K. , Sandberg, M. , Engholm, M. , Andersson, H. & Nilsson, H. (2018). Synthesis, Curing Behavior and Swell Tests of pH-Responsive Coatings from Acryl-Terminated Oligo(beta-Amino Esters). CHEMOSENSORS, vol. 6: 1
Rydberg, S. & Engholm, M. (2013). Charge transfer processes and UV induced absorption in Yb:YAG single crystal laser materials. Optical Materials Express, vol. 113: 22, ss. Art. no. 223510
Rydberg, S. & Engholm, M. (2013). Experimental evidence for the formation of divalent Ytterbium in the photodarkening process of Yb-doped fiber lasers. Optics Express, vol. 21: 6, ss. 6681-6688.
Engholm, M. , Jelger, P. , Laurell, F. & Norin, L. (2009). Improved photodarkening resistivity in ytterbium-doped fiber lasers by cerium codoping. Optics Letters, vol. 34: 8, ss. 1285-1287.
Engholm, M. & Norin, L. (2008). Preventing Photodarkening in Ytterbium-Doped High Power Fiber Lasers; Correlation to the UV-Transparency of the Core Glass. Optics Express, vol. 16: 2, ss. 1260-1268.
Engholm, M. & Norin, L. (2007). Comment on:"Photodarkeningin Yb-doped aluminosilicate fiber induced by 488nm irradiation". Optical Letter, vol. 33: 11, ss. 1216.
Engholm, M. & Norin, L. (2007). Strong UV absorption and visible luminescence in ytterbium-doped aluminosilicate glass under UV excitation. Optics Letters, vol. 32: 22, ss. 3352-3354.
Engholm, M. , Norin, L. , Edvardsson, S. , Lashgari, K. & Westin, G. (2006). A structural investigation of a synthesized precursor for fiber optical applications; the heterobimetallic ErNb_2(OPr^i)_13. Optical materials (Amsterdam), vol. 29: 4, ss. 386-391.
Engholm, M. , Lashgari, K. , Edvardsson, S. , Westin, G. & Norin, L. (2005). Atomically designed precursors in optical fiber amplifiers : The thermal stability of the heteroimetallic ErAl_3(OPri)_12 in a solution-coated silica soot. Journal of Applied Physics, vol. 97: 11, ss. 113104
Åberg, D. , Edvardsson, S. & Engholm, M. (2003). Direct calculation of correlated absorption amplitudes for Nd:LiYF4. Physical Review B. Condensed Matter and Materials Physics, vol. 68: 19
Edvardsson, S. , Karlsson, K. G. & Engholm, M. (2002). Accurate spin axes and solar system dynamics: climatic variations for the Earth and Mars. Astronomy & Astrophysics, vol. 384: 2, ss. 689-701.
Artiklar, forskningsöversikter
Maslik, J. , Andersson, H. , Forsberg, V. , Engholm, M. , Zhang, R. & Olin, H. (2018). PEDOT:PSS temperature sensor ink-jet printed on paper substrate. Journal of Instrumentation, vol. 13
Doktorsavhandlingar
Engholm, M. (2008). Materials optimization for optical fiber amplifiers and fiber lasers. Diss. (Sammanläggning) Sundvall : Mid Sweden University, 2008 (Mid Sweden University doctoral thesis : 50)
Konferensbidrag
Bond, L. , Andersson, H. , Örtegren, J. , Larsson, M. & Engholm, M. (2024). Electrically conductive polymer-graphene composite material for selective laser sintering additive manufacturing. I Progress in Biomedical Optics and Imaging - Proceedings of SPIE.
Bond, L. , Andersson, H. & Engholm, M. (2024). Laser-assisted processing of nano-graphite/silicon anode materials for improved performance of Li-ion batteries. I Progress in Biomedical Optics and Imaging - Proceedings of SPIE.
Bond, L. , Jönsson, E. & Engholm, M. (2024). Production of Yb:YVO4 nanoparticles by pulsed laser ablation in liquid using a femtosecond laser. I Progress in Biomedical Optics and Imaging - Proceedings of SPIE.
Frey, B. N. , Balliu, E. , Vigneron, P. -. , Knall, J. , Hawkins, T. W. , Meehan, B. , Cahoon, M. A. , Ballato, J. & et al. (2023). Cooling Yb-Doped Silica Fibers and Fiber Lasers with Anti-Stokes Pumping. I Proceedings of SPIE - The International Society for Optical Engineering.
Ballato, J. , Hawkins, T. W. , Dragic, P. D. , Engholm, M. , Digonnet, M. J. F. & Dong, L. (2023). Material approaches to thermal management in advanced fiber lasers and amplifiers. I Proceedings of SPIE - The International Society for Optical Engineering.
Vigneron, P. , Meehan, B. , Cahoon, M. A. , Hawkins, T. W. , Ballato, J. , Dragic, P. D. , Engholm, M. , Boilard, T. & et al. (2022). Anti-Stokes Cooling of Nanoparticle-Doped Silica Fibers. I PHOTONIC HEAT ENGINES : SCIENCE AND APPLICATIONS IV. (Proceedings of SPIE)
Knall, J. M. , Vigneron, P. -. , Engholm, M. , Dragic, P. D. , Yu, N. , Ballato, J. , Bernier, M. & Digonnet, M. (2020). Experimental observation of cooling in Yb-doped silica fibers. I Proceedings of SPIE - The International Society for Optical Engineering.
Balliu, E. , Engholm, M. & Nilsson, H. (2019). A compact, single-frequency, high-power, SBS-free, Yb-doped single-stage fiber amplifier. I Proceedings of SPIE - The International Society for Optical Engineering.. S. 6pp-
Hammarling, K. , Muri, H. I. , Wahl, M. S. , Engholm, M. & Hjelme, D. R. (2018). A combined glucose and pH sensor on a single optical fiber for continuous point-of-care testing. I SPIE BIOS, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XVIII.
Muri, H. I. , Hammarling, K. , Wahl, M. , Engholm, M. & Hjelme, D. R. (2018). Combining interferometric sensors for dual parameter fiber optic chemical sensing. I Optics InfoBase Conference Papers.
Forsberg, V. , Andersson, H. , Engholm, M. , Thungström, G. , Zhang, R. , Hummelgård, M. , Olin, H. & Norgren, M. (2018). Photodetector of multilayer exfoliated MoS2 deposited on polyimide films. Paper presented at the 20th International Workshop on Radiation Imaging Detectors, Sundsvall, 24-28 June, 2018
Mazlik, J. , Andersson, H. , Forsberg, V. , Engholm, M. , Zhang, R. & Olin, H. (2018). Temperature sensor based on PEDOT : PSS ink-jet printed on paper substrate. Paper presented at the 20th International Workshop on Radiation Imaging Detectors, Sundsvall, 24-28 June, 2018
Hammarling, K. , Engholm, M. , Muri, H. I. , Wahl, M. S. & Hjelme, D. R. (2017). Dual parameter fiber optic sensor combining a Fabry-Perot and a Mach-Zehnder interferometer. I Proceedings of IEEE Sensors. (IEEE Sensors). S. 1440--1442.
Balliu, E. , Andersson, H. , Engholm, M. , Zhang, R. , Forsberg, S. & Olin, H. (2016). Laser processing of graphene oxide on different coated paper substrates. I 14th TAPPI Advanced Coating Symposium 2016.. S. 97--101.
Balliu, E. , Andersson, H. , Engholm, M. , Forsberg, S. & Olin, H. (2016). Laser-assisted reduction of graphene oxide for paper based large area flexible electronics. I Proceedings of SPIE - The International Society for Optical Engineering.
Balliu, E. , Andersson, H. , Hummelgård, M. , Olin, H. & Engholm, M. (2015). Laser sintering of silver nano-particles inks printed on paper substrates. I Proceedings of SPIE - The International Society for Optical Engineering.. S. Art. no. 935112-
Balliu, E. , Engholm, M. , Hellström, J. , Elgcrona, G. & Karlsson, H. (2014). Compact nanosecond pulsed single stage Yb-doped fiber amplifier. I Proceedings of SPIE - The International Society for Optical Engineering.. S. Art. no. 895910-
Norin, L. & Engholm, M. (2013). On the origin of color centers in photodarkened Yb-fibers. I Optics InfoBase Conference Papers. (Optics InfoBase Conference Papers)
Engholm, M. , Rydberg, S. & Hammarling, K. (2013). Strong excited state absorption (ESA) in Yb-doped fiber lasers. I FIBER LASERS X: TECHNOLOGY, SYSTEMS, AND APPLICATIONS. (Proceedings of SPIE). S. Art. no. 86010P-
Rydberg, S. C. & Engholm, M. (2012). Photodarkening mechanisms in ytterbium fiber lasers; a comparison of UV-induced losses in glass and crystalline materials. I 2012 Conference on Lasers and Electro-Optics, CLEO 2012.. S. Art. no. 6326558-
Zeil, P. , Malmstrom, M. , Engholm, M. , Jelger, P. , Jacobsson, B. , Pasiskevicius, V. & Laurell, F. (2011). Extended tunability of narrow-linewidth Yb-fiber laser. I 2011 Conference on Lasers and Electro-Optics: Laser Science to Photonic Applications, CLEO 2011.. S. Art. no. 5950619-
Engholm, M. & Norin, L. (2009). The role of charge transfer processes for the induced optical lossesin ytterbium doped fiber lasers. I The role of charge transfer processes for the induced optical lossesin ytterbium doped fiber lasers.
Engholm, M. & Norin, L. (2008). Materials optimization for ytterbium-doped high power fiber lasers. I 2008 CONFERENCE ON LASERS AND ELECTRO-OPTICS & QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE, VOLS 1-9. New York : . S. 232--233.
Engholm, M. & Norin, L. (2008). Reduction of photodarkening in Yb/Al-doped fiber lasers. I Proceedings of SPIE - The International Society for Optical Engineering. (PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS). S. U269--U276.
Engholm, M. & Norin, L. (2007). Divalent Ytterbium in Ytterbium Doped Aluminosilicate Glass - Aspects on Photodarkening in Fiber Lasers. I 2007 CONFERENCE ON LASERS & ELECTRO-OPTICS/QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE (CLEO/QELS 2007), VOLS 1-5. New York : . S. 1902--1903.
Lashgari, K. , Kritikos, M. , Engholm, M. , Norin, L. , Edvardsson, S. & Westin, G. (2006). Sol-gel preparation of Er-doped planar and fibre wave-guides using heterometallic. I SPIE conference, San Diego (2006)..
Manuskript
Engholm, M. , Vanin, E. & Norin, L. Characterization of Erbiuim Crystallites Embedded in Silica Glass.