Patent ID: 6493374
Filing Date: 2002-12-10
Classification: G03F,H01S

Abstract:
A smart narrow band electric discharge laser for producing an output laser beam said laser comprising:A) a laser frame; B) a laser chamber a adjustably mounted in said frame; C) a laser gas contained within said chamber; D) two elongated spaced apart electrodes contained within said chamber, said electrodes and laser gas between them defining gain medium; E) an output coupler; F) a line narrowing module comprising a prism beam expander, and a bendable grating defining a grating curvature, said line narrowing module and its optical components and the output coupler defining a resonant cavity; G) a wavemeter for detecting laser beam parameters including at least pulse energy, wavelength and bandwidth; H) a computer controller; and I) a wavefront correction means controlled by said computer controller to adjust the grating curvature to shapes more complex then simple concave or simple convex, based on beam quality information provided to said computer controller by said wavemeter.