Materials, Photonic Devices, and Sensors

Superficial waveguide splitters fabricated by femtosecond laser writing of LiTaO3 crystal

[+] Author Affiliations
Chen Cheng, Feng Chen

Shandong University, School of Physics, Jinan 250100, China

Carolina Romero, Javier R. Vázquez de Aldana

Universidad de Salamanca, Laser Microprocessing Group, Departamento Física Aplicada, Salamanca 37008, Spain

Opt. Eng. 54(6), 067113 (Jun 29, 2015). doi:10.1117/1.OE.54.6.067113
History: Received April 8, 2015; Accepted June 3, 2015
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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 1.55μm. 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.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Chen Cheng ; Carolina Romero ; Javier R. Vázquez de Aldana and Feng Chen
"Superficial waveguide splitters fabricated by femtosecond laser writing of LiTaO3 crystal", Opt. Eng. 54(6), 067113 (Jun 29, 2015). ; http://dx.doi.org/10.1117/1.OE.54.6.067113


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