Electric discharge gas laser

An electric discharge gas laser comprising:

• a laser body including
• a housing capable of containing a gas capable of generating a laser beam,
• a rotating fan provided in said housing to circulate the gas in said housing, said rotating fan having a rotating shaft, and
• a bearing device operable to magnetically support said rotating shaft in a floating condition, said bearing device including a sensor device comprising a sensor operable to sense the position of said rotating shaft relative to said bearing device to generate signals indicating the position of said rotating shaft;
• and
• a control device including
• a signal processor operable to receive and process the signals delivered from said sensor to output processed signals, and
• an exciting electric power control operable to receive the processed signals from said signal processor and to generate, on the basis of the processed signals, an electromagnet exciting current for controlling said bearing device,
• wherein said signal processor is provided in said laser body and said exciting electric power control is separated from said laser body.