Abstract

Optically addressable fiber interconnects can be realized by using light deflection from photoinduced gratings. Such devices using isotropic Bragg diffraction have been proposed e.g. by Pauliat et al.¹. Taking advantage of the anisotropic Bragg diffraction technique^2,3 we demonstrate an all optical monomode fiber coupler with photorefractive KNbO₃ crystals. KNbO₃ is a very sensitive photorefractive material with large electro-optic coefficients ⁴: r₄₂=380 pm/V and r₅₁=105 pm/V. The anisotropic Bragg diffraction takes full advantage of these non-diagonal elements of the electro-optic tensor. With this method a beam deflector in a non-critical configuration has been built⁵ and investigated.

© 1990 Optical Society of America