3D photonic integrated 4x4 multi-mode interference coupler

Madeleine Nuck; Moritz Kleinert; Hauke Conradi; David de Felipe; Crispin Zawadazki; Anja Scheu; Martin Kresse; Walter Brinker; Norbert Keil; Martin Schell

doi:10.1117/12.2509776

4 March 2019 3D photonic integrated 4x4 multi-mode interference coupler

Madeleine Nuck, Moritz Kleinert, Hauke Conradi, David de Felipe, Crispin Zawadazki, Anja Scheu, Martin Kresse, Walter Brinker, Norbert Keil, Martin Schell

Author Affiliations +

Proceedings Volume 10921, Integrated Optics: Devices, Materials, and Technologies XXIII; 109211C (2019) https://doi.org/10.1117/12.2509776
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

3D photonic integration introduces a new degree of freedom in the design of photonic integrated circuits (PICs) compared to standard 2D-like structures. Novel applications such as large-scale optical switching matrices, e.g. for top-of- rack cross connect switches in data centers, benefit from the additional design flexibility due to their waveguide crossing-free architecture and compact footprint. In this work, a novel 3D 4×4 multi-mode interference coupler (MMI) based on HHI’s polymer-based photonic integration platform PolyBoard is presented. The fabrication process of the PolyBoard platform allows for the realization of vertically stacked polymer waveguide layers. Cascading two of the presented 3D 4×4 MMIs will form the building block of future large-scale 3D switching matrices. The 3D 4×4 MMI structure comprises two waveguide layers separated by a distance of 7.2 μm, with two input and two output waveguides in each layer, and a multimode interference (MMI) section in between. The vertical MMI section serves as the interconnection between the different waveguide layers and distributes the incoming light from each input waveguide across the four output ports of the 4×4 MMI. Design rules and fabrication methodology of these novel structures are presented in detail. Preliminary measurements demonstrate the proof-of-concept indicating an insertion loss below 9.3 dB, including fiber-chip coupling loss and the 6 dB intrinsic loss.

Conference Presentation

Citation Download Citation

Madeleine Nuck, Moritz Kleinert, Hauke Conradi, David de Felipe, Crispin Zawadazki, Anja Scheu, Martin Kresse, Walter Brinker, Norbert Keil, and Martin Schell "3D photonic integrated 4x4 multi-mode interference coupler", Proc. SPIE 10921, Integrated Optics: Devices, Materials, and Technologies XXIII, 109211C (4 March 2019); https://doi.org/10.1117/12.2509776

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available