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Spin-orbital interaction of a photon manifests itself in two effects. The first one is the influence of the trajectory on the light polarization. The second one is the influence of the polarization on the trajectory of light. The influence of the trajectory on the light polarization has been investigated theoretically (Chiao & Wu, 1986; Rytov, 1938; Vladimirskii, 1941) and the change in the azimuth of linearly polarized light has been observed experimentally under light propagation through a helical (coiled into a spiral) single mode optical fiber (Tomita & Chiao, 1986). The influence of light polarization on trajectory was demonstrated for the first time under total internal reflection. It was shown that reflected rays suffer a longitudinal shift for the linearly polarized light (Goos & Hanchen, 1947; 1949; Picht, 1929) and transverse shift for the circularly polarized light (Fedorov, 1955; Imbert, 1972). The value of the shifts is on the order of the light wavelength and depends on the state of light polarization. All mentioned effects have been investigated independently till 1990. The influence of the trajectory on polarization and the influence of the polarization on the trajectory were considered as mutually inverse effects for the first time by Zel’dovich and Liberman in 1990 (Zel’dovich & Liberman, 1990). The interpretation of these effects in terms of quantum mechanics as an interaction between the orbital momentum of photon and its spin (polarization) has been done by Zeldovich, Dooghin, Kundikova and Liberman in 1991 (Doogin et al., 1991). This interpretation was based on prediction and experimental investigation of optical Magnus effect. The effect manifests itself as speckle pattern rotation of circular polarized light transmitted through a multimode step-index fiber under circular polarization sign change (Doogin et al., 1992; 1991).

Optical Effects Connected with Coherent Polarized Light Propagation Through a Step-Index Fiber