Compact Optical Gyroscopes pra-0082

Full Title Investigation of Possibilities for Development of Compact Optical Gyroscopes of a New Generation Tech Area / Field

SAT-SUF: Space, Aircraft and Surface Transportation / Surface Transportation

Brief Description of Technology The project objective is the theoretical and experimental study of the possibilities for developing compact optical gyroscopes of a new generation. By now, optical gyroscopes involving CW ring gas lasers and ring fibre interferometers have become common tools among the variety of gyroscopic instruments used in different areas of science and engineering, including the air and space industries. They have been proven to possess a number of advantages over mechanical gyroscopes. Gyroscope competitiveness is determined not only by precision characteristics (sensitivity, drift and stability of a scale coefficient), but also by weight and size as well as possibility of mass production and cost. Further development of optical gyroscopes is specified by their prospective application requirements.

The research will be focused on the following trends: 1. The investigation into ways of simplifying and miniaturizing the design of an all-fiber ring interferometer gyroscope with two independent orthogonal polarizations (without any polarizer). 2. The study of dynamic processes in a ring laser, providing information on cavity phase nonreciprocity, self-modulation regimes and phase-sensitive relaxation oscillations in a compact fiber ring laser.

Legal Aspects I.A.Andronova, V.M. Gelikonov, G.V. Gelikonov, D.P. Stepanov, Patent priority of 14.06.1996, State Registration No. 95109968 (Russia).

Special Facilities in Use and Their Specifications We have an experimental sample of an all-fiber gyro. Moreover, we have all the necessary equipment for investigation of the laser dynamic behavior, the optical spectrum of radiation in both counterpropagating waves, and the rf intensity fluctuations spectrum of radiation in a 0.4-1500 kHz range.

In order to create a fiber ring laser and successfully carry out experimental investigations, the groups must purchase the following equipment: one (1) single-mode diode laser, one (1) superlum diode, one (1) Faraday rotator, two (2) Faraday isolators, culmination optics for a diodes, 1000 m single-mode anisotropic fiber and 20 m single-mode Nd-dopped fiber.

Scientific Papers Andronova I.A., Bershtein I.L. “Suppression of intensity fluctuation in semiconductor lasers”, Kvantovaya Elektronica, v.18, pp.678-680 (1991).

Andronova I.A., three co-authors. “The functional characteristics of a fiber Sagnac interferometer as microfasometer”, Isvestiya vysshikh uchebnykh zavedenii, seriya radiofisika, v.34, pp.412-418 (1991).

Andronova I.A., six co-authors. “The fluctuation characteristics of all fiber Sagnac interferometer at a wave of 0,85 mkm”, Zhurnal Tekhnicheskoi Fiziki, v.60, pp. 216-219 (1990).

Andronova I.A., Geliconov V.M., Stepanov D.P. “Transient polarization effects as the cause of the drift from a ring fiber interferometer”, Kvantovaya Elektronica, v.21, pp. 824-827 (1994).

Andronova I.A., Mamaev Yu.A. “The peculiarities of measurement of nonreciprocal effects with the Sagnac interferometer”, Optica i spectroscopiya, v.80, N1 (1996).

P.A.Khandokhin, I.Koryukin, Ya.I.Khanin and P.Mandel. “Influence of carrier diffusion on the dynamics of a two-mode lasers”, IEEE Journal of Quantum Electronics, v.31, p.647 (1995).

I.V.Koryukin, P.A.Khandokhin, Ya.I.Khanin, P.Mandel. “Dynamics of a ring laser with diffusion of active centers”, Kvantovaya Elektronika (Moscow), v.22, p.1081 (1995).

P. Khandokhin, Ya.Khanin, J.-C.Celet, D.Dangoisse, P.Glorieux. “Low frequency relaxation oscillations in class B lasers with feedback”, Opt. Commun., v.123, p.273 (1996).

P.Khandokhin, Ya.Khanin, “Interaction between relaxation oscillations and the occurrence of instabilities in a class-B bi-directional laser with a nonreciprocal ring cavity”, Kvantovaya Elektronika (Moscow), v.23, p.36 (1996).

N.D.Milovsky, Ya.I.Khanin, P.A.Khandokhin and S.Bielawski, D.Derozier, P.Glorieux. “Dynamics of a class B laser with two elliptically-polarized modes”, SPIE Proceedings of the International Conference on Laser Optics, ed. by N. Abraham and Ya.I. Khanin.

I. S. Kim and J. Blake. “Division of RIN in the signal and quadrate channels of a fiber gyroscope”, Opt. Lett. 19, 1648-1650 (1994).

S. L. A. Carrara, S. F. M. Almeida, C. E. Covington, and J. N. Blake. “Modeling of the bend sensitivity of the asymmetrical core two-mode-fiber interferometers,” J. Opt. Soc. Am. A 12, pp. 869-880 (1995).

I. S. Kim, P. Tantaswadi, and J. Blake. “A Coherence Collapsed Laser Diode for the Fiber Optic Gyroscope”, Opt. Lett. 20, pp. 731-733 (1995).

R. de Carvalho and J. Blake. “The Sagnac interferometer as a dual parameter sensor”, J. Lightwave Technol., 13, pp. 1250-1255 (1995).

J. Blake, P. Tantaswadi, and R. T. de Carvalho. “In-Line Sagnac Interferometer Current Sensor”, IEEE Transactions on Power Delivery, 11, pp. 116-121 (1996).