Low power InP-based monolithic DFB-laser IQ modulator with SiGe differential driver for 32 GBd QPSK modulation

We present for the first time 32 GBd QPSK of an InP-based IQ modulator with monolithically integrated laser and co-packaged SiGe driver. Power consumption is 1.1 W, which is well within the CFP4 module overall budget of 6 W.