Abstract
Reflection of light by a 3D printed parabolic mirror overcomes the in-plane limitation of end facet coupling between two photonic devices (such as on-chip waveguides, optical fibers). With a 3D printed parabolic mirror, light can leave the wafer-plane. This enables wafer-level optical testing, where we can identify problematic devices easily and do not need to waste assembly on them. Furthermore, with the proper curvature design, the mirrors generate a bigger beam waist than the mode sizes at the waveguide end facet, which reduces requirements on the alignment accuracy[1]. Depending on the reflection coating, a parabolic mirror can work over a very large wavelength range (e.g. from the UV to the infrared for an Al coating) compared to a grating coupler, which typically spans only a few tens of nano-meters[2]. In this study, a parabolic mirror base is 3D printed using a 3D-Nanoscribe two-photon polymerization printer. The reflection layer is formed by Al coating. Details of the design, fabrication, and preliminary characterization of the mirrors will be presented.
Original language | English |
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Title of host publication | ECIO 2022: 23rd European Conference on Integrated Optics |
Subtitle of host publication | 4th May - 6th May, Milan, Italy |
Place of Publication | Milan |
Publisher | Politecnico di Milano |
Pages | 324-326 |
Publication status | Published - 4 May 2022 |
Event | 23rd European Conference on Integrated Optics, ECIO 2022 - Milan, Italy Duration: 4 May 2022 → 6 May 2022 Conference number: 23 |
Conference
Conference | 23rd European Conference on Integrated Optics, ECIO 2022 |
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Abbreviated title | ECIO |
Country/Territory | Italy |
City | Milan |
Period | 4/05/22 → 6/05/22 |