Coherent light generators – Particular active media – Gas
Patent
1997-04-30
1999-02-02
Bovernick, Rodney
Coherent light generators
Particular active media
Gas
H01S 322, H01S 3223
Patent
active
058675175
ABSTRACT:
A sealed gas laser tube (10) has a pair of electrically insulated electrodes (53, 54) supported in the tube (11) adapted to couple to an external RF supply (30). With respect to each electrode, an RF feed terminal (84) having an externally threaded stem (84a) supported in the tube cooperates, through a sealable common feed/fill port (43) in the housing (11), with a movable plunger (100) stem (102) having an internally threaded central recess (105) supported (90) by the electrode such that when the terminal and plunger are in first positions spaced apart from each other, the plunger stem is withdrawn from the feed/fill port which is open wider than in the prior art enabling faster evacuation and refilling, and, when the terminal and plunger are in second positions drawn together, the plunger stem is pulled into the feed/fill port sealingly contacting an inner portion (82a) of an o-ring (82), the outer portion (82c) of which is simultaneously compressed (83) by the RF feed terminal to sealingly contact a feed/fill port wall, thereby re-sealing the tube and enabling normal laser operations with the RF feeds supplying the RF excitation. An opening (93) in the electrode support through which the plunger is drawn is wide enough that the plunger is self centering due to the action of the o-ring (82) as it is drawn tight by the RF feed terminal to close the port whereby bending forces are eliminated from the electrodes.
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Risser Christian Julian
Sukhman Yefim P.
Bovernick Rodney
Lisa Donald J.
Universal Laser Systems, Inc.
Wise Robert E.
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