Large photoinduced refractive index changes in pulsed-laser-deposited lead germanate glass waveguides with controllable refractive index sign change |
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Authors: | S. Mailis L. Reekie S. Pissadakis S.J. Barrington R.W. Eason N.A. Vainos C. Grivas |
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Abstract: | Photosensitive lead germanate glass optical waveguides have been grown by pulsed laser deposition. The deposited waveguides are photosensitive over a broad ultraviolet spectral range (325-193 nm). Positive and/or negative refractive index changes have been observed, depending on the intensity of the ultraviolet radiation as well as on the deposition conditions. Absolute refractive index change values up to |(n|=1.06᎒-2 have been measured. |
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