Femtosecond laser micromachined optical waveguides in LiTaO3 crystal |
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| Authors: | Miaomiao Xu Ruiyun He Shuqian Sun Javier R Vázquez de Aldana Feng Chen |
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| Institution: | 1. School of Physics, State Key Laboratory of Crystal Materials and Key Laboratory of Particle Physics and Particle Irradiation (Ministry of Education), Shandong University, Jinan 250100, P.R. China;2. Taishan College, Shandong University, Jinan 250100, P.R. ChinaPhone: +86‐531‐88363496;3. Taishan College, Shandong University, Jinan 250100, P.R. China;4. Laser Microprocessing Group, Universidad de Salamanca, Salamanca 37008, Spain |
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| Abstract: | By using femtosecond laser micromachining, optical wave guides in both depressed cladding and dual‐line configurations have been produced in LiTaO3 crystal. The guiding properties and the thermal stability have been investigated for both geometries, which exhibit different performance. Depressed cladding waveguides support guidance along both extraordinary and ordinary index polarizations, while dual‐line waveguides support only extraordinary index polarization. Thermal annealing has been proved to be an effective method to reduce the propagation losses. For the cladding waveguide, the lowest propagation loss was as low as 0.38 dB/cm after the annealing treatment at 400 °C. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
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| Keywords: | optical waveguides LiTaO3 crystals laser micromachining |
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