Patent ID: 7970037
Filing Date: 2011-06-28
Classification: H01P,H01S

Abstract:
1. Apparatus, comprising: a gas discharge laser having an operating impedance in an operating condition at an operating resonant frequency when a gas discharge in the laser is lit; at least one source of radio frequency (RF) power for powering the gas discharge, the RF power source having a source impedance, the source impedance being greater than the operating impedance; at least one plurality of transmission line sections connected in series in an electrically conductive path between the RF power source and the laser, at least first and second ones of the transmission line sections having respectively first and second different characteristic impedances; and wherein the length and characteristic impedance of each of the transmission line sections is selected to transform the source impedance to a third impedance lower than the source impedance for optimizing RF power transmission from the RF power source to the gas discharge laser.