Patent ID: 6795473
Filing Date: 2004-09-21
Classification: G02B,H01S

Abstract:
An excimer or molecular fluorine laser system, comprising:a laser chamber filled with a gas mixture at least including a halogen-containing species and a buffer gas; a plurality of electrodes within the laser chamber connected to a discharge circuit energizing the gas mixture; a laser resonator defining a beam path and including the laser chamber and a line-narrowing and/or line-selection package generating an output beam with a bandwidth less than 1 pm; the laser resonator including a grating element having a dielectric highly reflective (HR) coating formed thereon, the grating element including a plurality of grooves, the grating element selecting a narrow band from a broader spectral distribution to continue along said beam path after being incident upon said grating element, the grating element dispersing outer portions of said spectral distribution away from the beam path.