Patent ID: 6496528
Filing Date: 2002-12-17
Classification: G03F,H01S

Abstract:
A grating based line narrowing device for line narrowing a laser producing high energy laser beams, said device comprising:(A) a grating having a grooved surface layer or layers fixed on a rigid grating substrate, said grating defining a long direction, (B) a chamber for housing at least said grating, (C) a purge means for providing a purge gas for purging said chamber, (D) a beam expanding means for expanding a beam from said laser to produce an expanded beam, (E) a tuning means for directing said expanded beam onto the grating face in order to select from said expanded beam a desired range of wavelengths, and (F) a flexural grating mount comprising: (1) a first part and a second part, said first part and said second part each being securely attached to said chamber, and said grating being securely attached to said first part only; (2) a flexure joint connecting said first part to said second part so as to permit said second part to move relatively easily in said long direction relative to said first part.