Comparison of Integrated Optical Phase Shifters Designed in Different Regime Hao Chen, Haoran Meng, Xinyue Liu, Junke Ding, Jianguang Jiang, Gang Chen and Yinlei Hao MATEC Web Conf., 173 (2018) 01034 Published online: 19 June 2018 DOI: 10.1051/matecconf/201817301034