Ultra-broadband polarisation beam splitters and rotators based on 3D-printed waveguides  

作　　者：Aleksandar Nesic Matthias Blaicher Pablo Marin-Palomo Christoph Füllner Sebastian Randel Wolfgang Freude Christian Koos 

机构地区：[1]Institute of Photonics and Quantum Electronics(IPQ),Karlsruhe Institute of Technology(KIT),Karlsruhe,Germany [2]Institute of Microstructure Technology(IMT),Karlsruhe Institute of Technology(KIT),Eggenstein-Leopoldshafen,Germany [3]Vanguard Automation GmbH,Karlsruhe,Germany

出　　处：《Light(Advanced Manufacturing)》2023年第3期251-262,共12页光（先进制造）（英文）

基　　金：supported by the Deutsche Forschungsgemeinschaft(DFG,German Research Foundation)in the framework of the Collaborative Research Center(CRC)Wave Phenomena(SFB 1173,project-ID 258734477);under Germany's Excellence Strategy via the Excellence Cluster 3D Matter Made to Order(EXC-2082/1–390761711);by the Bundesministerium für Bildung und Forschung(BMBF)within the projects PRIMA(#13N14630),DiFeMiS(#16ES0948),Open6GHub(#16KISK010);by the European Research Council(ERC Consolidator Grant‘TeraSHAPE’,#773248);by the Photonic Packaging Pilot Line PIXAPP(#731954);by the Alfried Krupp von Bohlen und Halbach Foundation,by the Karlsruhe School of Optics and Photonics(KSOP);by the Karlsruhe Nano-Micro Facility(KNMF).A.N.was supported by the Erasmus Mundus Joint Doctorate Programme Europhotonics(grant number 159224-1-2009-1-FR-ERA MUNDUS-EMJD).

摘　　要：Multi-photon lithography has emerged as a powerful tool for photonic integration,allowing to complement planar photonic circuits by 3D-printed freeform structures such as waveguides or micro-optical elements.These structures can be fabricated with a high precision on the facets of optical devices and enable highly efficient package-level chip-chip connections in photonic assemblies.However,plain light transport and efficient coupling is far from exploiting the full geometrical design freedom offered by 3D laser lithography.Here,we extended the functionality of 3D-printed optical structures to manipulation of optical polarisation states.We demonstrate compact ultra-broadband polarisation beam splitters(PBSs)that can be combined with polarisation rotators and mode-field adapters into a monolithic 3D-printed structure,fabricated directly on the facets of optical devices.In a proof-of-concept experiment,we demonstrate measured polarisation extinction ratios beyond 11 dB over a bandwidth of 350 nm at near-infrared telecommunication wavelengths around 1550 nm.We demonstrate the viability of the device by receiving a 640 Gbit/s dual-polarisation data signal using 16-state quadrature amplitude modulation(16QAM),without any measurable optical-signal-to-noise-ratio penalty compared to a commercial PBS.

关 键 词：Photonic integration Additive laser manufacturing Multi-photon lithography Polarisation splitter/rotator 

分 类 号：TN252[电子电信—物理电子学]