• Kevin Farley

    Kevin Farley is a scientist at Nufern.

    FIGURE 1. A schematic representation of a double-clad active fiber structure (a) and an energy diagram of an Er:Yb co-doped glass indicating the major transitions (b).
    Rare-earth doped, double-clad fibers offer large volumes for optical pumping, with the potential for improved performance in applications such as CATV, lidar, and medical systems...
    Sept. 14, 2016
    FIGURE 1. Cladding absorption of 400-μm-clad, Yb-doped fibers at 915 nm as function of core size. Fiber A (green curve) with 0.065 NA is optimized for delivering power with good beam quality. Fiber B (blue curve) with 0.07 NA maximizes cladding absorption for a given core size.
    High powers can be achieved at lower costs by selecting optical fiber that maximizes absorption. However, excellent beam quality with high power and the best cost performance ...
    Jan. 17, 2014
    FIGURE 1. Optical fibers are most commonly based on the double-clad fiber geometry (a), commonly with an octagon-shaped inner cladding to increase pump absorption (b).
    Fiber laser performance at the kilowatt power level has been improved by the careful matching of active and passive fibers, which has led to higher-power operation while maintaining...
    Jan. 1, 2012