Popis: |
In this paper, the performance characteristics of the INDEX 300 lithographic industrial excimer laser are presented. The laser operates with a linewidth of 3.0 pm and spectral purity of 94%. The wavelength stability is better than ± 1.0 pm over short and long term operation in both continuous and intermittent modes. By means of a novel technique, an absolute wavelength standard is used as a reference for wavelength stabilization. The advantages of this approach to wavelength stabilization are discussed. |