50 Gb/s Silicon Photonics Receiver With Low Insertion Loss

Callum G. Littlejohns, Youfang Hu, Frederic Y. Gardes, David J. Thomson, Scott A. Reynolds, Goran Z. Mashanovich, Graham T. Reed
2014 IEEE Photonics Technology Letters  
Optical (de)multiplexers which can provide low insertion loss, low cross-talk, high thermal stability and insensitivity to fabrication tolerances are essential components for silicon photonics integration. In this paper we demonstrate the integration of an angled multimode interferometer coarse wavelength division multiplexer with germanium p-i-n photodetectors to form a 50 Gb/s receiver with a low insertion loss of < -0.5 dB and cross-talk of < -15 dB. The angled multimode interferometer has
more » ... nterferometer has the flexibility to be designed on a platform with a wide range of waveguide thicknesses with little variation in performance, which allows for the optimisation of other optical components in the photonics integrated circuit.
doi:10.1109/lpt.2014.2303578 fatcat:ekvei64r6baevb5sy7r3llgjiu