We report the first study of optical planar and channel waveguides fabricated in the new nonlinear crystal Ca<sub>4</sub>YO(BO<sub>3</sub>)<sub>3</sub> by use of MeV He+-implantations. The <i>n</i><sub><i>x</i></sub>, <i>n</i><sub><i>y</i></sub>, and <i>n</i><sub><i>z</i></sub> refractive index modifications are studied. Losses in nonannealed YCOB waveguides measured with a CCD camera are found to be less than 2 dB cm<sup>−1</sup>. This work is the first step toward the investigation of frequency conversion within the obtained guiding structures.
© 2004 Optical Society of America
Azzedine Boudrioua, Brice Vincent, Paul Moretti, Sorine Tascu, Bernard Jacquier, and Gérard Aka, "Optical Planar and Channel Waveguides in the New Nonlinear Crystal Ca4 YO(BO3)3 (YCOB) Fabricated by He + Implantation," Appl. Opt. 43, 491-495 (2004)