CASCADED OPTICAL HARMONIC GENERATION

摘要

Cascaded optical harmonic generators and methods for cascaded optical harmonic generation are disclosed. Relative disposition of individual harmonic generators of a cascaded harmonic generator in an optical path of the fundamental optical beam may be reversed. In a third harmonic generator, the fundamental optical beam may enter the third harmonic crystal first, and the second harmonic crystal second. When the fundamental optical beam enters the third harmonic crystal first, the fundamental light may remain non-depleted by second harmonic generation process.

主权项

1. A third harmonic generator comprising:
a first beam combiner configured to combine a first fundamental optical beam with a second harmonic optical beam; a third harmonic crystal coupled to the first beam combiner, configured to generate a third harmonic optical beam from the first fundamental optical beam and the second harmonic optical beam, wherein upon generation of the third harmonic optical beam, a residual fundamental optical beam exits the third harmonic crystal; a first beam splitter coupled to the third harmonic crystal, configured to separate the residual fundamental optical beam and the third harmonic optical beam; and a second harmonic crystal coupled to the first beam splitter, configured to generate the second harmonic optical beam from the residual fundamental optical beam, and for coupling the second harmonic optical beam to the first beam combiner.