Beam shaping of high intensity high frequency optical output

A wavelength converter system comprising:

• an optical wavelength converter configured to generate a wavelength converted output beam of radiation from an input beam of radiation;
• and
• an optical output coupler configured to receive the wavelength converted output beam of radiation, wherein the optical output coupler includes a plano-concave lens having a planar side and a concave side, wherein an optical axis of the plano-concave lens is tilted about an axis of curvature of the plano-concave lens or an axis parallel to the axis of curvature at or near a Brewster angle relative to a beam axis such that a beam of radiation is incident on a concave side of the plano-concave lens;
• a first optical element configured to focus a beam of radiation emerging from the planar side of the plano-concave lens along a first axis that is perpendicular to the beam axis;
• and a second optical element, wherein the first optical element is disposed between the planar side of the plano-concave lens and the second optical element, wherein the second optical element is configured to focus a beam of radiation emerging from the planar side of the plano-concave lens along a second axis that is perpendicular to the beam axis, wherein the second axis is different from the first axis.

A wavelength-converted optical source, comprising:

• a source of optical radiation;
• an optical wavelength converter optically coupled to the source of optical radiation, wherein the optical wavelength converter is configured to generate a wavelength converted output beam of radiation from an input beam of radiation;
• and
• an optical output coupler configured to receive the wavelength converted output beam of radiation, wherein the optical output coupler includes a plano-concave lens having a planar side and a concave side, wherein an optical axis of the plano-concave lens is tilted about an axis of curvature of the plano-concave lens or an axis parallel to the axis of curvature at or near a Brewster angle relative to a beam axis such that a beam of radiation is incident on a concave side of the plano-concave lens;
• a first optical element configured to focus a beam of radiation emerging from the planar side of the plano-concave lens along a first axis that is perpendicular to the beam axis;
• and a second optical element, wherein the first optical element is disposed between the planar side of the plano-concave lens and the second optical element, wherein the second optical element is configured to focus a beam of radiation emerging from the planar side of the plano-concave lens along a second axis that is perpendicular to the beam axis, wherein the second axis is different from the first axis.