Abstract

We describe a novel method for writing Bragg retro-reflectors, in photosensitive^[1] (monomode) optical fiber or planar waveguide structures. The essence of the method is to use a phase mask grating to modulate spatially with pitch $\frac{{\lambda }_{\text{Bragg}}}{{\text{n}}_{\text{Effective}}}$ the phase of a UV beam (for example, from an excimer laser source); λ_Bragg is the desired resonant wavelength for retro-reflective intra-mode coupling in the fiber and n_Effective is the effective index of the fundamental mode at λ_Bragg.

© 1993 Optical Society of America