Implanted waveguides in borate crystals (LTB, β-BBO, and LBO) for frequency conversion

Abstract Helium implantation is used to produce optical waveguides in LTB, β-BBO and LBO materials. These waveguides present a step index behavior revealing a good optical quality of the guiding region with losses in the range 2–5 dB cm−1. The annealing process at 200°C during 2–24 h showed a good stability of the guiding region with a slight decrease of the optical losses. Preliminary results of SHG in LBO:He+ waveguides are reported.