A 10-50 gd high strength polyethylene fiber and preparation method thereof are provided, which are in the high molecular material field. One or more of the side and end facets of a planar waveguide amplifier are angled with respect to a fast axis defined in a transverse plane perpendicular to a core region. A simulated layout image of a corrected layout is used as an input to a field solver program that calculates the electrical properties of the features as they will be printed on a wafer.