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The MFI–Michelson fiber interferometer.
Experimental dependencies of phase shift (left) and refractive index change (right) versus wavelength of the signal wave. Curves 1–4 are measured for different signal-wave powers (see inset at the left) and pump power ; curve 5 is the correspondent theoretical dependence built with the use of the KKR and the experimental data on absorption and gain spectra of the fiber presented in inset on the right.
Experimental (dots) and theoretical (lines) dependencies of the erbium fiber transmission vs its length (pump power—). A set of theoretical curves is built for the different values of ESA loss in the fiber and .
Experimental (dots) and theoretical (lines) dependencies of overall phase-shift (left) and refractive index change (right) versus signal-beam wavelength for the different ( and mW) pump powers. Inset—dependencies of the thermal-induced contributions in phase-shift and refractive index vs pump power ().
Parameters used in modeling.
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