Coherent light generators – Particular pumping means – Electrical
Patent
1998-09-04
2000-10-24
Font, Frank G.
Coherent light generators
Particular pumping means
Electrical
372 82, 372 87, H01S 3097
Patent
active
061378186
ABSTRACT:
An RF-excited discharge laser includes a pair of electrodes and an RF power source, both electrodes being ungrounded, the power source being adapted to apply an RF voltage to both electrodes, the respective voltages applied to each plate being out of phase. A balanced discharge is thereby established in which the inter-electrode voltage is unchanged whilst the potential difference between each electrode and the surrounding grounded surfaces is halved. Thus, the trade off between discharge power and discharge escape likelihood is overcome. The voltages applied to the electrodes are preferably 180 degrees out of phase, or nearly so. One way of delivering the RF energy to the electrodes is to provide a power splitter to divide the output of the RF supply into two outputs, one of which is delivered to one electrode and the other of which is delivered to the other electrode in substantial anti-phase. This anti-phase delivery can be achieved by, for example, employing coaxial cable with an additional half-wavelength. An alternative manner of delivering the voltages to both electrodes is to supply the RF energy directly to a single electrode, and connect the other electrode to a quarter wavelength transmission path. A suitable transmission path is an end-grounded RF transmission line, such as a coaxial cable, preferably connected via a suitable matching network.
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Excitation LLC
Font Frank G.
Rodriguez Armando
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