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Femtosecond laser micromachined optical waveguides in LiTaO 3 crystal
Author(s) -
Xu Miaomiao,
He Ruiyun,
Sun Shuqian,
Aldana Javier R. Vázquez de,
Chen Feng
Publication year - 2013
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201308102
Subject(s) - materials science , cladding (metalworking) , femtosecond , optics , laser , surface micromachining , annealing (glass) , thermal stability , thermal , refractive index , waveguide , optoelectronics , composite material , chemistry , physics , medicine , alternative medicine , organic chemistry , pathology , fabrication , meteorology
By using femtosecond laser micromachining, optical wave guides in both depressed cladding and dual‐line configurations have been produced in LiTaO 3 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)