Femtosecond writing of refractive-index changes in sapphire is demonstrated by doping the crystal with an appropriate ion (here: Ti3+) that reduces the threshold of the process. Passive and active buried channel waveguiding is demonstrated.
© 2004 Optical Society of America
(230.0230) Optical devices : Optical devices
(230.7380) Optical devices : Waveguides, channeled
(320.0320) Ultrafast optics : Ultrafast optics
(320.2250) Ultrafast optics : Femtosecond phenomena
V. Apostolopoulos, L. Laversenne, T. Colomb, C. Depeursinge, R. Salathe, M. Pollnau, R. Osellame, G. Cerullo, and P. Laporta, "Femtosecond irradiation induced refractive-index changes and channel waveguiding in bulk Ti3+:sapphire," in Conference on Lasers and Electro-Optics/International Quantum Electronics Conference and Photonic Applications Systems Technologies, Technical Digest (CD) (Optical Society of America, 2004), paper CMY4.
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