Efficient generation of green and UV light in a single PP-KTP waveguide pumped by a compact all-fiber system

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Abstract

We present simultaneous efficient second- (SHG) and third-harmonic generation (THG) in a single periodically-poled KTP waveguided crystal pumped by a compact femtosecond Yb-based laser in a condition of exactly phase-matched frequency doubling and nonphase-matched sum-frequency mixing processes. Internal conversion efficiency as high as 33% for SHG (532 nm) and ∼2% for the cascaded THG (355 nm) is reported. We believe this to be a clear experimental demonstration that strong third-harmonic can be generated in frequency doubling crystals through a nonphase-matched sum-frequency mixing process. © 2006 American Institute of Physics.

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Rusu, M., Rafailov, E. U., Herda, R., Okhotnikov, O. G., Saltiel, S. M., Battle, P., … Sibbett, W. (2006). Efficient generation of green and UV light in a single PP-KTP waveguide pumped by a compact all-fiber system. Applied Physics Letters, 88(12). https://doi.org/10.1063/1.2187396

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