Second-harmonic generation in periodically poled bulk Rb-doped KTiOPO4 below 400 nm at high peak-intensities
2013 (English)In: Optics Express, ISSN 1094-4087, Vol. 21, no 2, 1395-1403 p.Article in journal (Refereed) Published
We demonstrate that bulk Rb-doped KTiOPO4 (RKTP) shows improved susceptibility to gray-tracking compared to flux-grown KTiOPO4. We show high-fidelity periodic poling of 1 mm thick RKTP with a period of 3.18 mu m for second harmonic generation at 398 nm with a normalized conversion efficiency of 1.79%/Wcm. The crystal is used to frequency-double 138 fs-long pulses with an efficiency of 20% and a peak intensity of 560 MW/cm(2) without visible gray-tracking signs. We demonstrate that two-photon absorption is the predominant mechanism limiting the SHG efficiency in this spectral range at high peak powers and high repetition rates.
Place, publisher, year, edition, pages
Optical Society of America, 2013. Vol. 21, no 2, 1395-1403 p.
Nonlinear optics, materials, Ferroelectrics, Harmonic generation and mixing
Other Physics Topics
IdentifiersURN: urn:nbn:se:kth:diva-116381DOI: 10.1364/OE.21.001395ISI: 000315989500004ScopusID: 2-s2.0-84874049906OAI: oai:DiVA.org:kth-116381DiVA: diva2:589228
FunderSwedish Research Council
QC 201302202013-01-172013-01-172014-01-14Bibliographically approved