Frequency stabilization of gas lasers

Details Frequency stabilization of gas lasers Frequency stabilization of gas lasers

1988-08-22

1989-08-01

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Optical output stabilization

372 28, 372 4, 372 59, H01S 313

Patent

active

048539350

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.

REFERENCES:
patent: 3566304 (1971-02-01), Neusel et al.
patent: 4434490 (1984-02-01), Kavaya et al.
patent: 4538635 (1985-09-01), Laderman et al.

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