Ion-exchanged waveguides in periodically poled Rb-doped KTiOPO4 for efficient second harmonic generation

• An ion-exchange process has been developed for periodically poled Rb-dopedKTiOPO4(RKTP) which warrants high efficiency and low loss channel waveguides. The domainstability was investigated, and it was found that domain gratings with uncharged walls couldstand the ion-exchange process without deterioration. 3.1 mW of blue second harmonic lightwas generated from 74 mW of radiation at 940.2 nm coupled into an 8μm wide and 7 mm longwaveguide, corresponding to a normalized conversion efficiency of 115%/Wcm2. Waveguides inPPRKTP open the possibility for stable operation at high optical powers, as well as generatingentangled photons at low optical powers, and enable the investigation of novel nonlinear processessuch as counter-propagating interactions in a waveguide format.

Subject headings

NATURVETENSKAP  -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)

NATURVETENSKAP  -- Fysik -- Annan fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Other Physics Topics (hsv//eng)

Publication and Content Type

ref (subject category)

art (subject category)