Martíenz Matos, ÓscarRodrigo Martín-Romo, José AugustoCalvo Padilla, María LuisaCheben, Pavel2023-06-202023-06-202009-02-150146-959210.1364/OL.34.000485https://hdl.handle.net/20.500.14352/44158© 2009 Optical Society of America. We gratefully acknowledge valuable discussions with Francisco del Monte. The financial support from the Spanish Ministry of Education and Science under the project TEC 2005-02180 is also acknowledged.Polarization properties of transmission volume holographic phase gratings recorded in a photopolymerizable glass modified with high refractive index species are reported. The gratings are recorded by the interference of two parallel s-polarized writing beams with orthogonal propagation directions. High optical quality, low scattering, and diffraction efficiency of 99.4% are achieved. Degrees of polarization of 0.987 and 0.999 are obtained for transmitted and diffracted light, respectively. Furthermore, phase analysis of the transmitted light reveals a phase discontinuity of π at the Bragg angle.engjournal articlehttp://dx.doi.org/10.1364/OL.34.000485http://www.opticsinfobase.org/open access535Diffraction EfficiencyElementsÓptica (Física)2209.19 Óptica Física