DBR mirrors, and vertical cavity surface emitting lasers that incorporate such mirrors, comprised of stacked, multiple levels of different materials having different etching rates for a selected etchant and etching method. Each of the front, intermediate and rear liners include an inner liner exposed to combustion gases and an outer liner spaced radially apart from the inner liner. The washing machine includes a drive motor that rotates the basket during the wash operation, and a balance ring associated with the basket containing counterweights that move within the balance ring to compensate for an imbalanced mass in the basket. The impedance localizes an axial electric field in the plurality of plasma accelerators for accelerating ionized gas through the one or more of the plurality of plasma accelerators to create thrust. A burning module can record data into a second disc image file and update the TOC information data associated with the second disc image file in the second sector.