A rigorous assessment of the impact of finite extinction ratio in systems corrupted with interferometric noise is presented. In contrast to previous work it is shown that the extinction ratio has minimal effect on the overall crosstalk tolerance, with signal-crosstalk beating between data '1' terms being dominant.
Mitchell, JE., Lane, PM., & O’Reilly, JJ. (1999). Evaluation of extinction ratio induced performance penalty due to interferometric noise. Electronics Letters, 35(12), 964-965. https://doi.org/10.1049/el:19990692