Patent
Highly efficient, single-pass, harmonic generator with round output beam
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TLDR
An extra cavity harmonic generator system may produce a round, non-astigmatic third harmonic output beam from a nominally round, nonsmooth, diffraction limited input fundamental beam as discussed by the authors.Abstract:
An extra cavity harmonic generator system may produce a round, non-astigmatic third harmonic output beam from a nominally round, non-astigmatic, diffraction limited input fundamental beam. The system may include a second harmonic generation crystal. An input fundamental beam size is expanded in a non-walkoff direction for the SHG crystal at the SHG crystal input face. A higher harmonic generation crystal has an output face oriented at an oblique angle of incidence in a non-walkoff direction for the HHG crystal such that an output higher harmonic beam size is contracted in this direction. Expansion of the input fundamental beam at the SHG crystal input face exceeds reduction of third harmonic beam at the HHG crystal output face.read more
Citations
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A femtosecond ultraviolet laser
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Laser system with highly efficient, single-pass, harmonic generator with round output beam
TL;DR: In this paper, a seed source optically coupled to an extra cavity harmonic generator system may produce a round, non-astigmatic third harmonic output beam from a nominally round, nonsmooth, diffraction limited input fundamental beam from the seed source.
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High efficiency laser system for third harmonic generation
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References
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Laser apparatus having multiple synchronous amplifiers tied to one master oscillator
TL;DR: In this paper, the authors describe a beam splitter that divides a signal from the master oscillator into two or more sub-signals, and each output head receives one of the two sub signals.
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