Patent ID: 7756183
Filing Date: 2010-07-13
Classification: H01S

Abstract:
1. A line narrowed laser apparatus comprising: a laser medium; an exciting source for exciting the laser medium; an optical resonator having a wavelength dispersive element disposed on a rear side of the laser medium and a partial transmission-type output coupler which is disposed on a front side of the laser medium; and a wavefront adjuster for obtaining a desired spectral purity width disposed on the front side of the laser medium on an optical axis between the laser medium and the partial transmission-type output coupler, said wavefront adjuster receiving light in a form of a spherical wave from a side of the laser medium, adjusting a wavefront of the light in the form of a spherical wave and outputting the light having the wavefront adjusted to a side of the partial transmission-type coupler, to thereby obtain the desired spectral purity width.