Abstract
In this paper, we propose a kind of phase conjugate fiber optic gyroscope (FOG). The natural time
reversal property of the phase conjugation process can eliminate much of the nonreciprocal effects in optical
gyroscope, so this can improve the FOG performance for better applications. We use the degenerate four-wave mixing
(DFWM) process to generate counter-propagating phase conjugated waves with the advantage that this process is free
from phase matching constrains. DFWM is also a parametric amplification process, so this can remedy the power
attenuation in the interacting process and improve the signal to noise ratio. This method can improve sensitivity of
the FOG as well. We also take advantage of the evanescent field outside the optical waveguide to interact with the
imposed pump field. In this way, we can maximize the nonlinear interaction through choosing proper waveguide
dimensions and the cladding materials.
© 2014 IEEE
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