An inert anode material for use in electrolytic processes comprises calcium ruthenate. Utilizing beam walk off where the signal wave and said idler wave have nonparallel Poynting vectors in the nonlinear medium and image rotation, a correlation zone of distance equal to approximately Lcrystal is created which, through multiple passes through the nonlinear medium, improves the beam quality of the OPO output. The door panel further includes at least one strip of seaming material adhered vertically along at least one face of the door panel extending from approximately the top edge of the door panel to approximately the bottom edge of the door panel, and being configured such that a top face of the vertical seaming material is substantially co-planar with a top face of the horizontal seaming material.