Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Broadband packaging of photodetectors for 100 Gb/s ethernet applications

: Jiang, C.H.; Krozer, V.; Bach, H.G.; Mekonnen, G.G.; Johansen, T.K.


IEEE transactions on components, packaging and manufacturing technology 3 (2013), Nr.3, S.422-429
ISSN: 2156-3950
Fraunhofer HHI ()

The packing structure of functional modules is a major limitaion in achieving a desired performance for 100 Gb/s ethernet applications. This paper presents a methodology of developing advanced packaging of photodetectors (PDs) for high-speed data transmission applications by using 3-D electromagnetic (EM) simulations. A simplified model of the PD module is first used to analyze and optimize packaging structures and propose an optimal packaging design based on the simplified model. Although a PD module with improved performance proved the success of the optimal packaging design, the simplified model could not identify other important bandwidth limitation effects. Therefore, a full 3-D EM model of PD modules is developed to predict the optical-to-electrical response of the module, and with this model, it is possible to identify a critical mode mismatch effect as another important factor of limiting the bandwidth of PD modules. After eliminating the mode mismatch effect by improving the chip-conductor-backed coplanar waveguide transition, a final optimal packaging structure is implemented for the PD module with reduced attenuation up to 100 GHz and a broader 3-dB bandwidth of more than 90 GHz. Furthermore, the PD module exhibits excellent performance under the high-speed data-transmission experiment with 107 Gb/s data rate.