Photoresist Bragg gratings as beam splitters and beam reflectors for integrated optical systems

Based on the theory of coupled waves the diffraction efficiency (DE) of Bragg reflectors on planar glass waveguides is described for the case of obliquely incident waves. The coupling coefficients of the different types of mode conversion are determined both by a perturbational analysis and by fitting of the theoretical DE curves to the experimental data. Results on the fabrication and use of photoresist gratings on monomode glass waveguides as beam splitters and beam reflectors are given.