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Highly efficient broadband sum-frequency generation in the visible wavelength range

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Calendron,  Anne-Laure
International Max Planck Research School for Ultrafast Imaging & Structural Dynamics (IMPRS-UFAST), Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science, Deutsches Elektronen Synchrotron, and Department of Physics, University of Hamburg;
The Hamburg Centre for Ultrafast Imaging, Universität Hamburg;

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Citation

Cankaya, H., Calendron, A.-L., Suchowski, H., & Kärtner, F. X. (2014). Highly efficient broadband sum-frequency generation in the visible wavelength range. Optics Letters, 39(10), 2912-2915. doi:10.1364/OL.39.002912.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002B-0CD1-5
Abstract
We report on efficient broadband sum-frequency generation, converting a 140 THz near-infrared bandwidth to the visible regime with photon conversion efficiency greater than 90%. Using a 20-mm-long aperiodically adiabatively poled KTP crystal, the spectral range 660–990 nm was converted to 405–500 nm using a strong pump wave at 1030 nm. The photon conversion efficiency was confirmed to be 92±0.5% when pumped with an intensity of 0.94  GW/cm2. Our experimental results agreed very well with analytic predictions and numerical simulations.