We report that self-focusing occurs with simultaneous self-inscription of a cylindrical waveguide when 514.5-nm light from a cw argon-ion laser propagates in a solgel-derived silica methacrylate hybrid glass planar waveguide. Spatially localized free-radical polymerization of methacrylate substituents is initiated in the path of the guided wave. This causes intensity-dependent refractive-index changes that lead to self-lensing and focusing. A channel waveguide evolves in the matrix, which supports fundamental and higher-order optical modes and suppresses diffraction of the beam.
© 2002 Optical Society of America
(160.6060) Materials : Solgel
(190.5940) Nonlinear optics : Self-action effects
(260.5950) Physical optics : Self-focusing
(300.6450) Spectroscopy : Spectroscopy, Raman
(310.2790) Thin films : Guided waves
Kalaichelvi Saravanamuttu and Mark P. Andrews, "Visible laser self-focusing in hybrid glass planar waveguides," Opt. Lett. 27, 1342-1344 (2002)