Patent ID: 9152008
Filing Date: 2015-10-06
Classification: G01N,G02B,G02F,H01S

Abstract:
1. An apparatus for laser frequency conversion having a high damage threshold, comprising: a fundamental laser light source configured to generate fundamental wavelength laser light; a first nonlinear optical crystal configured to receive fundamental laser light from the fundamental laser light source, the first nonlinear optical crystal configured to generate first alternate wavelength light by frequency converting at least a portion of the received fundamental laser light to first alternate wavelength light; a second nonlinear optical crystal configured to receive first alternate wavelength light from the first nonlinear optical crystal, the second nonlinear optical crystal configured to generate second alternate wavelength light by frequency converting at least a portion of the received first alternate wavelength light to second alternate wavelength light; a dual wavelength Brewster angle waveplate configured to receive first alternate wavelength light and second alternate wavelength light emanating from the second nonlinear optical crystal, the dual wavelength Brewster angle waveplate further configured to rotate a polarization of the first alternate wavelength light relative to the second alternate wavelength light such that the first alternate wavelength light and the second alternate wavelength light have substantially the same polarization; a set of Brewster angle wavefront processing optics configured receive first alternate wavelength light and second alternate wavelength light from the dual wavelength Brewster angle waveplate, the set of Brewster angle wavefront processing optics further configured to condition the first alternate wavelength light and second alternate wavelength light emanating from the dual wavelength Brewster angle waveplate; and a harmonic separator configured to receive the first alternate wavelength light and the second alternate wavelength light from the set of Brewster angle wavefront processing optics, the harmonic separator configured to at least partially separate the first alternate wavelength light from the second alternate wavelength light.