A generalized scheme to enhance the sensitivity in the measurement of phase difference in an optical interference by measuring the phase of the resultant field is presented. In the proposed scheme, the weak measurement in scalar optical interferometry is achieved by directly accessing the phase of the output state, rather than looking at the centroid shift in the intensity. The spatial confinement or beam-like characteristics for the optical field, an essential criterion for centroid calculation, is not a requirement for the scheme. The ability to uniquely sense and distinguish contributions to the phase difference from individual optical fields; an aspect with potential to improve the measurement accuracy in optical gyroscopes and gravitational wave sensing, is also presented.

提出了一种通过测量合成场的相位来提高光学干涉相位差测量灵敏度的通用方案。在所提出的方案中，通过直接访问输出状态的相位而不是查看强度的质心偏移来实现标量光学干涉中的弱测量。光场的空间限制或光束状特性是质心计算的基本标准，不是该方案的要求。能够独特地感知和区分来自各个光场的相位差的贡献；还介绍了有可能提高光学陀螺仪和引力波传感测量精度的一个方面。