Simultaneously Precise Calibration of Frequency Response and IQ Skew for 100Gbaud Optical Transceiver

We report a precise calibration method that can simultaneously characterize both frequency response and IQ-skew of coherent optical transceivers. 100GBaud-Nyquist-16QAM and 80GBaud-Nyquist-64QAM signal can be obtained by the use of commercial class-40 CDM and ICR.