Highly efficient single-pass sum frequency generation by cascaded nonlinear crystals

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The cascading of nonlinear crystals has been established as a simple method to greatly increase the conversion efficiency of single-pass second-harmonic generation compared to a single-crystal scheme. Here, we show for the first time that the technique can be extended to sum frequency generation, despite differences in the phase relations of the involved fields. An unprecedented 5.5 W of continuous-wave diffraction-limited green light is generated from the single-pass sum frequency mixing of two diode lasers in two periodically poled nonlinear crystals (conversion efficiency 50%). The technique is generally applicable and can be applied to any combination of fundamental wavelengths and nonlinear crystals.
Original languageEnglish
JournalOptics Letters
Volume40
Issue number23
Pages (from-to)5526–29
ISSN0146-9592
DOIs
Publication statusPublished - 2015

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