[5] WANG LI L, KOWALCYZK Tony. A Versatile Bias Control Technique for Any-Point Locking in Lithium Niobate Mach-Zehnder Modulators[J]. JOURNAL OF LIGHTWAVE TECHNOLOGY, 2010, 28(11): 1703 1704.
[6] YUAN Xueguang, ZHANG Yang 'an, ZHANG Jinnan, et al. Any Bias Point Control Technique for Mach-Zehnder Modulator [C]. Shanghai: ACP 2014, 2014.