Fig. 3: Characterization of C-band IQ modulator.
From: The plasmonic BTO-on-SiN platform – beyond 200 GBd modulation for optical communications
a Schematic of the IQ modulator consisting of two MZ modulators. b Frequency response of the IQ modulator featuring a cutoff at around 80 GHz. We find a 3-dB drop between 10 and 70 GHz. c SEM image of a phase shifter in the IQ modulator. d Optical microscope image of the IQ modulators wire bonded to a PCB. e Measurement setup for the IQ modulator. The PIC was diced and wire-bonded onto a PCB to contact all DC connections of the IQ modulator. f Fiber-to-fiber transmission of the IQ modulator
