Patent ID: 7715459

Claim:
An apparatus comprising: a very high power line narrowed lithography laser light source comprising: a solid state seed laser system comprising: a pre-seed laser providing a pre-seed laser output; a fiber amplifier receiving the pre-seed laser output and providing an amplified seed laser pulse comprising: a pulse having a nominal wavelength outside of the DUV range; a frequency converter modifying the nominal center wavelength of the output of the seed laser system to essentially the nominal center wavelength of the amplifier gain medium; a first and a second gas discharge laser amplifier gain medium each operating at a different pulse repetition rate from that of the seed laser output; a beam divider providing each respective first and second amplifier gain medium with output pulses from the seed laser; a beam combiner combining the outputs of each respective amplifier gain medium to provide a laser output light pulse beam having the pulse repetition rate of the solid state seed laser system.