• Ralph Delmdahl

    Ralph Delmdahl is product marketing manager at Coherent.

    FIGURE 1. Representation of the excimer laser LTPS process.
    Rainer Pätzel
    Jan. 18, 2017
    Excimer laser annealing allows production at high volume.
    FIGURE 1. As seen in this schematic, the phase-mask method of FBG writing produces an interference pattern that projects downward through space onto an optical fiber (top), resulting in evenly spaced FBG pattern in to fiber (bottom).
    Ralph Delmdahl
    Feb. 17, 2016
    An interference lithography based production system enables pushbutton fabrication of fiber Bragg gratings (FBGs) for remote fiber sensing.
    FIGURE 1. Excimer laser (193nm) vias drilled into glass: The 25μm diameter entrance hole (a), the exit hole (b), and the cross-sectional view (c).
    Ralph Delmdahl
    Sept. 18, 2015
    Laser ablation delivers higher throughput and better yields.