Journal
OPTICAL ENGINEERING
Volume 54, Issue 6, Pages -Publisher
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
DOI: 10.1117/1.OE.54.6.067113
Keywords
beam splitters; optical waveguides; femtosecond laser writing; LiTaO3 crystal
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Funding
- National Natural Science Foundation of China [U1332121]
- Ministerio de Economia y Competitividad, Spain [FIS2013-44174-P]
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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 pm. 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. (C) 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
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