Abstract
Flexible interference patterning is an important tool for adaptable measurement precisions. We report on experimental results of controllable two-photon interference fringes with thermal light in an incoherent rotational shearing interferometer. The two incoherent beams in the interferometer are orthogonally polarized, and their wavefront distributions differ only in an angle of rotation. The spacings and directions of the two-photon interference fringes vary with the rotation angle, as illustrated in three cases of two-photon correlation measurements in experiment.
Highlights
Multi-photon interference distinguishes itself by narrowed fringe spacings
In contrast to the previous investigations, we report on experimental results of flexible two-photon interference fringes with thermal light which are independent of measuring apparatuses
Their directions and fringe spacings vary with the rotation angle between the two overlapped thermal light beams in an incoherent rotational shearing interferometer
Summary
Multi-photon interference distinguishes itself by narrowed fringe spacings. The subwavelength interference fringes were first reported with entangled two-photon sources[4, 5]. In correlated interference experiments with thermal light, the multi-photon interference fringes can be spaced out with various gaps, from ordinary gaps to superresolved gaps. In contrast to the previous investigations, we report on experimental results of flexible two-photon interference fringes with thermal light which are independent of measuring apparatuses. Their directions and fringe spacings vary with the rotation angle between the two overlapped thermal light beams in an incoherent rotational shearing interferometer. Various interference patterns are obtained in three cases of two-photon correlation measurements
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