Dual-line optical waveguides in Cu:KNSBN crystal fabricated by direct femtosecond laser writing

Weijie Nie; Javier R. Vázquez de Aldana; Feng Chen

doi:10.1117/1.OE.54.9.097106

21 September 2015 Dual-line optical waveguides in Cu:KNSBN crystal fabricated by direct femtosecond laser writing

Weijie Nie, Javier R. Vázquez de Aldana, Feng Chen

Author Affiliations +

Optical Engineering, Vol. 54, Issue 9, 097106 (September 2015). https://doi.org/10.1117/1.OE.54.9.097106

Abstract

We report on dual-line waveguides fabricated by direct femtosecond laser writing in Cu:KNSBN crystal. Two different sizes have been designed with the separation between lines of 20 and 30 μm, respectively. The detailed structure of the dual-line waveguide has been imaged by means of micro-Raman analysis, indicating that the microstructure of the Cu:KNSBN crystal has no significant change after direct femtosecond laser writing. The dual-line waveguides support single-mode guidance along both transverse electric and transverse magnetic polarization at the wavelengths of 632.8 and 1064 nm, and show insensitivity to polarization of light. We suggest the potential application of the laser-written Cu:KNSBN waveguides as new integrated optical devices.

Citation Download Citation

Weijie Nie, Javier R. Vázquez de Aldana, and Feng Chen "Dual-line optical waveguides in Cu:KNSBN crystal fabricated by direct femtosecond laser writing," Optical Engineering 54(9), 097106 (21 September 2015). https://doi.org/10.1117/1.OE.54.9.097106

Published: 21 September 2015

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