High-efficiency frequency converters with periodically-poled Rb-doped KTiOPO4
2007 (English)In: Optical materials (Amsterdam), ISSN 0925-3467, Vol. 30, no 4, 594-599 p.Article in journal (Refereed) Published
Periodic structuring of ferroelectric domains in 2 mol% Rb-doped KTP is demonstrated using a room-temperature electric-field poling. Drastically reduced ionic conductivity in this material, or 2-orders of magnitude lower than in flux-grown KTP, makes it a good candidate for fabrication of quasi-phase-matched frequency converters. A coercive field of 3.4 kV/mm has been measured at room temperature. The dispersion of the index of refraction and effective nonlinearity in quasi-phase-matched structures in Rb-doped KTP did not show significant difference from KTP. A normalized conversion efficiency of 2.5% W-1 cm(-1) for the frequency-doubling of 908.4 nm has been obtained. A singly-resonant mid-infrared optical parametric oscillator with periodically-poled Rb-doped KTP generating 1.53 mu m signal and 3.49 mu m idler had threshold of 51 MW/cm(2) which is comparable to the best-quality periodically-poled KTP structures in the same optical cavity.
Place, publisher, year, edition, pages
2007. Vol. 30, no 4, 594-599 p.
flux-grown ktiopo4, generation, rbtiopo4, crystal, ktp, temperature
IdentifiersURN: urn:nbn:se:kth:diva-17150DOI: 10.1016/j.optmat.2007.01.011ISI: 000251499000014ScopusID: 2-s2.0-35549013351OAI: oai:DiVA.org:kth-17150DiVA: diva2:335193
QC 201005252010-08-052010-08-052015-03-30Bibliographically approved