Fast, Low-Complexity Widely-Linear Compensation for IQ Imbalance in Burst-Mode 100-Gb/s/λ Coherent TDM-PON

We propose fast, low-complexity widely-liner compensation for IQ imbalance in 100-Gb/s/λ coherent TDM-PON. The proposed method reduces the power penalty to 0.3 dB, achieving 32.4-dB loss budget for 100-Gb/s DP-QPSK bursts with an 826-ns overhead.