  We propose an original method to couple light into a whispering-gallery mode
resonator. This method benefits from the mode selectivity and robustness of the
prism-coupling along with the single-mode propagation of the fiber taper. It
consists in a prism shaped crystal with a waveguide inscribed inside it. The
waveguide is self-inscribed in-situ by beam self-trapping to allow an optimum
coupling to a given resonator.
