Patent ID: 7529285

Claim:
A method for the frequency stabilization of a gas laser with a laser tube ( 1 ), in particular for the operation in a laser-interferometer, which in stable operation comprises a continuous operation control with the following steps: Operating a laser for the radiation of laser light; measuring an intensity of at least one component of the radiated laser light; adjusting the tube temperature of the laser tube ( 1 ) in such a manner that the measured intensity is controlled to a predefined set-point value; wherein the method during startup of the gas laser, i.e., prior to the stable operation, comprises a startup control procedure with the following steps: Measuring an ambient temperature, wherein the ambient temperature is the temperature outside of housing parts arranged around and being in a fixed relation to the laser tube; controlling the condition of the laser tube ( 1 ) at least approximately to a set-point state, wherein the set-point state is a function of the measured ambient temperature and corresponds to a temperature of the laser tube ( 1 ) at the measured ambient temperature in a steady state condition without any additional heating or cooling; and switching over to the continuous operation control.