Patent ID: 6650666
Filing Date: 2003-11-18
Classification: G03F,H01S

Abstract:
An electric discharge laser with precision wavelength control for controlling center wavelengths of laser beams produced by said laser said laser comprising:A) a laser chamber, B) an elongated electrode structure enclosed within said chamber comprising an elongated anode and an elongated cathode separated by a distance defining a discharge region, said discharge region defining a long dimension in a beam direction, C) a laser gas contained in said chamber, D) a fan for circulating said laser gas within said chamber and through said discharge region, E) a wavemeter for measuring the centerline wavelength, F) a wavelength tuning mechanism comprising a tuning mirror and a piezoelectric driver for driving said tuning mirror, G) a first feedback control system for controlling said tuning mechanism using measurement information from said wavemeter, H) a load cell means for measuring vibrations of said tuning mirror, I) a second feedback control system for controlling said tuning mechanism based on signals from said load cell, wherein said second feedback control system comprises electronic equipment to control said piezoelectric driver based on measurements by said load cell.