In this paper, an active ring-coupled Mach-Zehnder interferometer (arcMZI) for rotation sensing is proposed. Theoretical resolution formula of this arcMZI gyroscope was deduced by using of transfer matrix method and noise analysis model. The simulation result shows that the theoretical maximum sensitivity of arcMZI gyroscope can be enhanced at least two orders of magnitude compared with the single-bus resonator (SBR) gyroscope for the same footprint and effective loss after equivalent optimization. The arcMZI gyroscope could be of great potential to meet the tactical demands of future inertial navigation.
KEYWORDS: Gyroscopes, Resonators, Waveguides, Active optics, Signal to noise ratio, Phase shifts, Signal attenuation, Optical engineering, Interference (communication), Glasses
We propose and analyze a gyroscope using active three-dimensional vertically coupled resonators (3D-VCRs), which allows for loss compensation, unidirectional propagation, and a larger sensing area while maintaining the same bulk volume. For the ideal uniform case, the minimum detectable rotation rate ΔΩmin of the active 3D-VCR gyroscope can be decreased by above three orders of magnitude after optimization compared with the passive case. The minimal measurable rotation rates of the 3D-VCR gyroscope, the loss-compensated coupled resonator optical waveguide (LC-CROW) gyroscope, and the equivalent resonant waveguide optical gyroscope (RWOG) decrease with a higher number N of the resonators. Finally, it is shown that the uniform active 3D-VCR gyroscope has a better resolution ΔΩmin than the equivalent LC-CROW and RWOG.
KEYWORDS: Gyroscopes, Resonators, Waveguides, Active optics, Signal to noise ratio, Wave propagation, Glasses, Phase shifts, 3D modeling, Refractive index
Active coupled resonator optical waveguide (CROW) structure can significantly enhance the performance of optical gyroscope due to its loss compensation effect and highly dispersive properties. In this paper, we analyze the effect of optical gain and its induced noise, i.e. spontaneous emission noise, on the properties of the active CROWs. A thorough investigation of the impact of various disorder degrees on the performance of the active three dimensional vertically coupled resonators (3D-VCR) gyroscope has been performed. It shows how the disorder interacted with coupling coefficient affects the achievable resolution ΔΩmin of gyroscope, and the degree of disorder will supplant the propagation loss to become an ultimate limitation. Finally, it is shown that the active 3D-VCR gyroscope (the number of ring, N>6) has better resolution ΔΩmin than that of the equivalent resonant waveguide optical gyroscope (RWOG).
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