Mode-field matching design, 3D fabrication and characterization of down-tapers on single-mode optical fiber tips for coupling to photonic integrated circuits

Koen Vanmol, Saurav Kumar, Vivek Panapakkam, Dries Van Thourhout, Hugo Thienpont, Nathalie Vermeulen, Jan Watte, Jürgen Van Erps

Onderzoeksoutput: Conference paper

Samenvatting

Photonic Integrated Circuits have made it possible to decrease the footprint of traditionally bulky optical systems and they create opportunities for various new and fascinating applications. One of the limiting factors for the widespread adaption of PICs is their connection to the outside world. As the mode field diameter of optical modes in waveguides tends to be an order of magnitude smaller than in their fiber counterparts, creating an efficient, robust and alignmenttolerant fiber-to-chip interface remains a challenge.

In this work, we investigate the optimization of the fiber-side of the optical interface, whereas the chip itself remains untouched and makes use of spot-size convertors. Optical fiber tips can be functionalized using two-photon polymerization-based 3D nanoprinting technology, which offers full 3D design freedom and sub-micrometer resolution. We present a down-taper design strategy to match the mode-field diameter of single-mode optical fibers to the modefield diameter of waveguides with spot-size converters on PICs.

The 3D printed down-tapers are characterized towards their geometry and mode shape, and we experimentally demonstrate their use for coupling towards a Silicon-On-Insulator chip with spot-size convertors. Furthermore, the performance of these down-tapered fibers is compared to conventional lensed fibers in terms of optical coupling efficiency.
Originele taal-2English
TitelConference on 3D Printed Optics and Additive Photonic Manufacturing II
UitgeverijSPIE
Pagina's1-7
Aantal pagina's7
Volume11349
ISBN van elektronische versie978-1-5106-3471-8
DOI's
StatusPublished - 2020
EvenementConference on 3D Printed Optics and Additive Photonic Manufacturing II - ELECTR. NETWORK
Duur: 6 apr 202010 apr 2020

Conference

ConferenceConference on 3D Printed Optics and Additive Photonic Manufacturing II
Periode6/04/2010/04/20

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