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Opt Lett. 2013 Feb 1;38(3):323-5. doi: 10.1364/OL.38.000323.

Channel waveguides on RbTiOPO4 by Cs+ ion exchange.

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Física i Cristal·lografia de Materials i Nanomaterials and EMaS, Universitat Rovira i Virgili, Campus Sescelades, Tarragona, Spain.


In this Letter we report Cs(+) ion exchange channel waveguides on RbTiOPO(4) (RTP) for what we believe is the first time. A Ti channel mask was fabricated on an RTP substrate by conventional photolithography. The ion exchange process was carried out in a CsNO(3) melt, and the channels produced ranged from 6 to 11 μm in width. The near-field pattern of the modes was recorded, and type II second harmonic generation in waveguide regime was obtained, producing 512.5 nm green light. The optical characterization shows optical losses of 3.8 dB/cm.

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