21 September 2015 Dual-line optical waveguides in Cu:KNSBN crystal fabricated by direct femtosecond laser writing
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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.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Weijie Nie, Weijie Nie, Javier R. Vázquez de Aldana, Javier R. Vázquez de Aldana, Feng Chen, 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 . Submission:
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