In this Letter we report Cs+ ion exchange channel waveguides on RbTiOPO4 (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 CsNO3 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.
© 2013 Optical Society of America
Original Manuscript: September 19, 2012
Revised Manuscript: December 5, 2012
Manuscript Accepted: December 14, 2012
Published: January 28, 2013
J. Cugat, R. Solé, J. J. Carvajal, X. Mateos, J. Massons, G. Lifante, F. Díaz, and M. Aguiló, "Channel waveguides on RbTiOPO4 by Cs+ ion exchange," Opt. Lett. 38, 323-325 (2013)