Abstract
We analyze how the evanescent coupling, , between the outermost resonators and input/output waveguides of an -resonator coupled resonator optical waveguide (CROW) gyroscope affects the transmission and sensitivity to rotations. For constant coupling between resonators , rotation sensitivities increase as both and while between these two limits the sensitivity has a minimum. In the weak coupling regime, , the sensitivity is enhanced by Fabry–Perot oscillations due to the impedance mismatch at the input/output waveguide–CROW interface, while in the strong coupling regime, , the sensitivity is reduced because the outermost resonators no longer contribute to the CROW transmission. For small the sensitivity is proportional to , while at larger the sensitivity begins to decrease due to resonator losses.
© 2013 Optical Society of America
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