Details

Autor(en) / Beteiligte

• Xue, Xiangyu
• Lievens, Enes
• Berteloot, Brecht
• Hsiao, Yu-Tung
• Iseghem, Lukas Van
• Feutmba, Gilles Freddy
• Bogaerts, Wim
• Neyts, Kristiaan
• Beeckman, Jeroen

Titel

Vertical Coupling Between Waveguides and Optical Fibers Utilizing Polarization Gratings

Ist Teil von

• IEEE photonics technology letters, 2024-03, Vol.36 (5), p.309-312

Ort / Verlag

New York: The Institute of Electrical and Electronics Engineers, Inc. (IEEE)

Erscheinungsjahr

2024

Quelle

IEEE Xplore Digital Library

Beschreibungen/Notizen

• We present how a conventional Si waveguide grating coupler can be integrated with a polymerizable liquid crystal polarization grating to provide vertical coupling between optical fibers and planar waveguides. The implementation involves the deposition of a liquid crystal polymer film onto the surface of the planarized photonic chip. To achieve optimal performance, both the period and thickness of the thin film grating are optimized through a two-dimensional finite element simulation. The simulation results indicate that the output beam can be entirely redirected towards the vertical direction. We demonstrate a fabricated device and experimental validation of the proposed device in a laboratory setting. Through the verification, we affirm the feasibility of the proposed concept.