Optical 16-QAM signal homodyne detection by extracting +/-π/4 and +/-3π/4-phase symbols. - Akira Mizutori; T. Abe; Takahisa Kodama; Masafumi Koga (OFC, 2017)

Nonlinear Phase-Shift Cancellation by Taking the Geometric Mean of WDM-Signal Phase-Conjugate Pair. - Takahisa Kodama; Akira Mizutori; Takayuki Kobayashi; Takayuki Mizuno; Masafumi Koga (IEICE Trans. Commun., 2018)