Experimental study of the mutual influence of fibre Faraday elements in a spun-fibre interferometer
V. P. Gubinab, S. K. Morshnevab, Ya. V. Przhiyalkovskyab*, N. I. Starostinab, A. I. Sazonovab
a Kotelnikov Institute of Radioengineering and Electronics, Fryazino Branch, Russian Academy of Sciences
b "Profotech" CJSC, Moscow
An all-spun-fibre linear reflective interferometer with two linked Faraday fibre coils is studied. It is found experimentally that there is mutual influence of Faraday fibre coils in this interferometer. It manifests itself as an additional phase shift of the interferometer response, which depends on the circular birefringence induced by the Faraday effect in both coils. In addition, the interferometer contrast and magneto-optical sensitivity of one of the coils change. A probable physical mechanism of the discovered effect is the distributed coupling of orthogonal polarised waves in the fibre medium, which is caused by fibre bend in the coil.
Faraday effect, spun fibre, linear interferometer.
* Author to whom correspondence should be addressed
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Quantum Electronics, 2015, 45:8, 754–758
07.60.Vg, 07.60.Ly, 42.81.Pa
V. P. Gubin, S. K. Morshnev, Ya. V. Przhiyalkovsky, N. I. Starostin, A. I. Sazonov, “Experimental study of the mutual influence of fibre Faraday elements in a spun-fibre interferometer”, Kvantovaya Elektronika, 45:8 (2015), 754–758 [Quantum Electron., 45:8 (2015), 754–758]
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