40 Gb/s DPSK Receiver Module for C+L Band with Athermal Free-Space Delay-Line-Interferometer

摘要

We present a hybrid integrated 40 Gb/s DPSK receiver module with athermal free-space delay-line-interferometer (DLI) as well as the opto-electric dc-characterisation algorithm based on the Muller-Matrix analysis. It offers wideband operation of 100 nm in the C+L band, a FSR of 43 GHz, PDFS of 350 MHz, TDFS (0 - 75℃) of 0.8 GHz and a saturated differential output voltage-swing of 600 mVpp. 43 Gb/s NRZ-DPSK back-to-back system experiments demonstrated an error-free transmission and an OSNR sensitivity of 18 dB (BER=10~(-9), PRBS 2~(3t)-1).