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Optical Engineering

Dual-line optical waveguides in Cu:KNSBN crystal fabricated by direct femtosecond laser writing
Author(s): Weijie Nie; Javier R. Vázquez de Aldana; Feng Chen
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Paper 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.

Paper Details

Date Published: 21 September 2015
PDF: 5 pages
Opt. Eng. 54(9) 097106 doi: 10.1117/1.OE.54.9.097106
Published in: Optical Engineering Volume 54, Issue 9
Show Author Affiliations
Weijie Nie, Shandong Univ. (China)
Javier R. Vázquez de Aldana, Univ. de Salamanca (Spain)
Feng Chen, Shandong Univ. (China)

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