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:Ti:Fe waveguides are thermally fixed during hologram recording at elevated temperatures. Different guides are fabricated by titanium indiffusion using iron-doped and nominally pure y-cutLiNbO3 substrates and characterization is performed by dark-mode spectroscopy. The refractive index modulation of gratings written and simultaneously fixed at 180 °C is investigated as a function of propagation depth, titanium and iron concentration. The experimental results are compared with those obtained for unfixed holograms recorded at room temperature.
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Received: 21. July 1997/Revised version: 13 October 1997
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Hukriede, J., Kip, D. & Krätzig, E. Thermal fixing of holographic gratings in planar LiNbO3:Ti:Fe waveguides . Appl Phys B 66, 333–338 (1998). https://doi.org/10.1007/s003400050397
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DOI: https://doi.org/10.1007/s003400050397