Coherent light generators – Particular active media – Gas
Patent
1985-12-02
1989-03-28
Sikes, William L.
Coherent light generators
Particular active media
Gas
372 83, 372 86, H01S 303
Patent
active
048171077
ABSTRACT:
The invention is described as embodied in a plasma chamber for use in gas lasers. A sealed nitrogen gas laser is provided with a pair of capacitance coupled, symmetrically positioned pre-ionizer elements in the form of a pair of insulated wire loops extending from one electrode to the region adjacent the other electrode. All parts of the plasma chamber accessible to ultraviolet radiation or ionized gases and are formed entirely of inorganic materials, such as ceramic and quartz, eliminating previously unrecognized difficulties resulting from the use of plastic or other organic materials in the chamber construction, thus making possible a sealed low-power nitrogen laser having a relatively long life. The pre-ionizer elements, which may be used in lasers of other types, both sealed and unsealed, produce a pre-ionization current that is limited to the capacitance displacement current, and are symmetrically positioned with respect to the adjacent negative electrode so that the laser beam is not distorted by the pre-ionization currents.
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Marchetti et al; "Compact Sealed TEA CO.sub.2 Lasers . . . "; IEEE J. of Quantum Electr.; vol. QE-19, No. 10; Oct. 1983; pp. 1488-1492.
Marchetti et al; "A New Type of Corona Discharge Photoionization"; J. Appl. Phys.; vol. 56, No. 11; Dec. 1984; pp. 3163-3168.
Laser Science, Inc.
Sikes William L.
Wise Robert E.
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