Frequency stabilization of gas lasers

Details Frequency stabilization of gas lasers Frequency stabilization of gas lasers

H - Electricity

01

S

315/24, 345/34

H01S 3/13 (2006.01) H01S 3/137 (2006.01) H01S 3/139 (2006.01)

Patent

CA 1287096

ABSTRACT A gas laser 10 has a gas-field enclosure 12 in which electrodes 14, 16 are operable to excite the gas within the enclosure to emit laser radiation. The region 20 between the electrodes 14, 16 contains a plasma which emits the laser radiation. At one end of the enclosure 12, there is a plasma-free region 22 undivided from the region 20. A microphone 24 is located in the plasma-free region 22. This detects pressure waves occurring in the plasma-free region when laser radiation is absorbed. The signal from the microphone is used to control a feedback circuit 26 to stabilize the frequency of the emitted laser radiation.

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