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23 January 1997 Photosensitivity of fluoride glass planar waveguides doped with rare earth ions (Ce3+, Eu2+, Er3+)
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Rare earth (Ce3+, Eu2+, Er3+) doped PZG (PbF2, ZnF2 GaF3) glass thin films fabricated by vapor phase deposition on CaF2 substrates have been shown to possess high photosensitivity. Efficient and permanent gratings have been written in the PZG glass by using a cw UV laser (244 nm). The kinetics of the grating growths were monitored by using a HeNe beam (633 nm) in course of grating photoinscription. The sample surfaces at the grating places were investigated through interferometric microscopy. The changes in refractive index modulation were estimated to be 6.8 multiplied by 10-3 and 3.7 multiplied by 10-3 in the Eu2+ and Ce3+ doped samples respectively. Stability of the gratings was investigated through 30 min isochronal thermal annealing experiment.
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Marc Douay, Wenxiang Xie, Pascal Bernage, Pierre Niay, Brigitte Boulard, Youping Gao, Charles Jacoboni, and H. Poignant "Photosensitivity of fluoride glass planar waveguides doped with rare earth ions (Ce3+, Eu2+, Er3+)", Proc. SPIE 2998, Photosensitive Optical Materials and Devices, (23 January 1997);

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