Nikiforov
Vladimir O.
D.Sc., Prof.
doi: 10.17586/2226-1494-2016-16-5-780-786
EVALUATION METHOD FOR PARASITIC EFFECTS OF THE ELECTRO-OPTICAL MODULATOR IN A FIBER OPTIC GYROSCOPE
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For citation: Volkovskiy S.A., Aleynik A.S., Nikitenko A.N., Smolovik M.A., Pogorelaya D.A. Evaluation method for parasitic effects of the electro-optical modulator in a fiber optic gyroscope. Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 2016, vol. 16, no. 5, pp. 780–786. doi: 10.17586/2226-1494-2016-16-5-780-786
Abstract
Subject of Research.The paper proposes an original method for studying the parasitic effects in the electro-optic modulator of the fiber optic gyroscope. Proposed method is based on the usage of a special waveform phase modulation signal. Method. The essence of the proposed method lies in modification of serrodyne modulation signal, thereby providing a periodic displacement of the phase difference signal to the maximum of the interference curve. In this case, the intensity level reflects the influence of parasitic effects with the degree of manifestation being determined by the sequence of voltage control signals applied to the modulator. Enumeration of combinations of control signals and the corresponding intensity levels gives the possibility to observe an empirical dependence of the parasitic effects and use it later for compensation. Main Results. The efficiency of the proposed method is demonstrated by the program model of the fiber optic gyroscope. The results of the method application on a production sample of the device were obtained. Comparison with the results of direct estimate of the parasitic intensity modulation effect testifies to the effectiveness of the proposed method. Practical Relevance. The method can be used as a diagnostic tool to quantify the influence of parasitic effects in the electro-optic modulator of the fiber optic gyroscope as well as for their subsequent compensation.
Acknowledgements. This work was performed at ITMO University with the financial support of the Ministry of Education and Science of the Russian Federation (Unique project ID: RFMEFI57815X0109, Agreement No14.578.21.0109).
References
1. Busurin V.I., Nosov Yu.R. Fiber Optic Sensors: Physical Basics, Calculation and Application. Moscow, Energoatomizdat Publ., 1990, 256 p.
2. Okosi T., Okamoto K., Otsu M., Nisihara H., Kuma K., Hatate K. Fiber-Optic Sensors. Leningrad, Energoatomidat Publ., 1990, 256 p. (in Russian)
3. Lefevre Н.С. Fiber Optic Gyroscope. 2nd ed. London, Artech House, 2014, 416 p.
4. Pavlath G.A. Closed-loop fiber optic gyros. Proc. SPIE, 1996, vol. 2837, pp. 46–60. doi: 10.1117/12.258198
5. Nagata H., Ichikawa J. Progress and problems in reliability of Ti:LiNbO3 optical intensity modulators. Optical Engineering, 1995, vol. 34, no. 11, pp. 3284–3293.
6. Ishibashi C., Ye J., Hall J.L. Analysis/reduction of residual amplitude modulation in phase/frequency modulation by an EOM. Proc. Quantum Electronics and Laser Science. Long Beach, USA, 2002, vol. 74, pp. 91–92.
7. Jin W., Culshaw B. Signal-feedback induced intensity modulation in a fibre optic gyro system. IEE Proceedings. Part J, Optoelectronics, 1992, vol. 139, no. 5, pp. 318–324.
8. Salvestrini J.P., Guilbert L., Fontana M., Abarkan M., Gille S. Analysis and control of the DC drift in LiNbO 3-based Mach–Zehnder modulators. Journal of Lightwave Technology, 2011, vol. 29, no. 10, pp. 1522–1534. doi: 10.1109/JLT.2011.2136322
9. Chong K.H., Choi W.S., Chong K.T. Analysis of dead zone sources in a closed-loop fiber optic gyroscope. Applied Optics, 2016, vol. 55, no. 1, pp. 165–170. doi: 10.1364/AO.55.000165
10. Seino M., Nakazawa T., Kubota Y. et al. A low DC-drift Ti:LiNbO3 modulator assured over 15 years. Proc. OSA Optical Fiber Communications Conf., 1992, pp. 321–324. doi: 10.1364/OFC.1992.PD3
11. Nagata H., Honda H., Akizuki K. Initial bias dependency in dc drift of z-cut LiNbO3 optical intensity modulators. Optical Engineering, 2000, vol. 39, no. 4, pp. 1103–1105.
12. Yamada S., Minakata M. DC drift phenomena in LiNbO3 optical waveguide devices. Japanese Journal of Applied Physics, 1981, vol. 20, no. 4, pp. 733–737. doi: 10.1143/JJAP.20.733
13. Sun F., Wang L., Wang G., Liu G. Study on the drift of modulated phase in interference fiber optic gyroscope. Journal of Computers, 2010, vol. 5, no. 3, pp. 394–400. doi: 10.4304/jcp.5.3.394-400
14. Kurbatov A.M. Method of Stabilization of the Scale Factor of Fiber Optic Gyroscope. Patent RU 2160885, 1999.
15. Lefevre H., Martin F. Optical-Fiber Measuring Device, Gyrometer, Central Navigation and Stabilizing System. Patent US 5141316, 1992.
16. Lefevre H., Martin F. Optical Fiber Measuring Device using Phase Difference. Patent US 5337142, 1994.
17. Urgell A., Willemenot E., Gaiffe T. Method and Power-Assisted Optic-Fiber Measuring Device and Gyro. Patent US 7777890, 2010.
