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← ScienceWhich outcome occurs in a fiber optic gyroscope operating with a laser when mechanical stress alters index?
A)Sagnac effect induced phase shift✓
B)Increased Rayleigh scattering intensity
C)Laser gain medium saturation decline
D)Polarization mode dispersion increases rapidly
💡 Explanation
The Sagnac effect induces differing phase shifts for beams traveling in opposite directions because the fiber deformation changes effective optical path. Therefore, a phase shift occurs, rather than alternatives driven by unrelated mechanisms such as imperfections or thermal effects.
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