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Optical Engineering

Superficial waveguide splitters fabricated by femtosecond laser writing of LiTaO3 crystal
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Paper Abstract

We report on Y-branch superficial depressed-cladding waveguides fabricated by femtosecond laser writing of MgO:LiTaO3 crystal. The cladding waveguides with a rectangular cross-section are single mode for both transverse electric and transverse magnetic polarization, and show good transmission properties at a telecommunication wavelength of 1.55  μm. Divergence angles as large as 2.6 deg are successfully achieved in the splitters with nearly equalized splitting ratios (1:1). The fabricated shallow structures are excellent photonic elements for optoelectronic applications.

Paper Details

Date Published: 29 June 2015
PDF: 4 pages
Opt. Eng. 54(6) 067113 doi: 10.1117/1.OE.54.6.067113
Published in: Optical Engineering Volume 54, Issue 6
Show Author Affiliations
Chen Cheng, Shandong Univ. (China)
Carolina Romero, Univ. de Salamanca (Spain)
Javier R. Vázquez Rodríguez Vázquez de Aldana, Univ. de Salamanca (Spain)
Feng Chen, Shandong Univ. (China)

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