Microoptical Gyros Based on Whispering Gallery Mode Resonators

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Abstract

Optical gyros, such as ring laser gyros and fiber optical gyros, have become a basis for strapdown inertial navigation systems due to a number of advantages (larger dynamic range of the measured velocities; high stability of scale factor, insensitivity to linear acceleration and G-stress; smaller readiness time, etc.). Despite success in its development, ring laser and fiber optic gyros are unsuitable for using in control systems of small portable devices because of its large size and weight. Now the actual task is miniaturization of optical gyros, or development and research of microoptical gyros.

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About the authors

Yu. V. Filatov

St. Petersburg Electrotechnical University „LETI“

Author for correspondence.
Email: photonics@technosphera.ru
ORCID iD: 0000-0002-4388-8033

Doctor of Technical Sciences, Professor, Head of Department Laser Measurement and Navigation Systems Department

Russian Federation, St. Petersburg

A. S. Kukaev

St. Petersburg Electrotechnical University „LETI“

Email: photonics@technosphera.ru
ORCID iD: 0000-0002-9525-8412

Cand. of Technical Sciences, Associate Professor, Laser Measurement and Navigation Systems Department

Russian Federation, St. Petersburg

V. Yu. Venediktov

St. Petersburg Electrotechnical University „LETI“

Email: photonics@technosphera.ru
ORCID iD: 0000-0002-0728-2050

Doctor of Physical and Mathematical Sciences, Professor, Chief Researcher Laser Measurement and Navigation Systems Department

Russian Federation, St. Petersburg

A. A. Sevryugin

St. Petersburg Electrotechnical University „LETI“

Email: photonics@technosphera.ru

Cand. of Physical and Mathematical Sciences, Senior Lecturer, Laser Measurement and Navigation Systems Department

Russian Federation, St. Petersburg

E. V. Shalymov

St. Petersburg Electrotechnical University „LETI“

Email: photonics@technosphera.ru
ORCID iD: 0000-0002-0731-6978

Cand. of Technical Sciences, Associate Professor, Laser Measurement and Navigation Systems Department

Russian Federation, St. Petersburg

References

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  6. Filatov Yu. V., Shalymov E. V., Venediktov V. Yu., Dmitrieva A. D. The comparison of the influence of centrifugal forces and the Sagnac effect on a rotating whispering gallery modes resonators. Proc. SPIE. 2016;9992: 99920A.
  7. Filatov Yu. V., Shalymov E. V., Venediktov V. Yu. Use of Whispering Gallery Modes Frequency Splitting for Rotation Speed Measurement. Proc. of Advanced Photonics. 2018; SeW4E.3.
  8. Filatov Yu. V., Kukaev A. S., Shalymov E. V., Venediktov V. Yu. Investigation of a shift of whispering-gallery modes caused by deformations and tensions. Optical Engineering. 2017; 56(10):107104.
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Supplementary files

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2. Fig. 1. Types of passive ring resonators, considered as sensitive elements of MOGs

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3. Fig. 2. The Echo Wall around the Temple of Heavent in Beijing (left) and the whispering gallery of St. Paul’s Cathedral in London (right)

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4. Fig. 3. Сross-section of the WGM resonator connected with an auxiliary waveguide

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5. Fig. 4. Intensities of light I1 and I2 at the output of the resonator when the wave goes around it clockwise and counterclockwise, respectively (solid line – I1 and I2 of the stationary resonator, dashed line – I1 and I2 of the rotating resonator)

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6. Fig. 5. Dependence of the reciprocal frequency shift on the angular velocity

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7. Fig. 6. Bottleneck resonator design

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8. Fig. 7. Reciprocal frequency shift when using constant bias

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9. Fig. 8. Output characteristics of the sensor when using a constant bias (I – with Ωb = 0 rad / s (without bias), II – with Ωb = 5 rad / s, III – with Ωb = 20 rad / s, IV – with Ωb = 50 rad / s)

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10. Fig. 9. The total angular velocity of the resonator (bottom), the dependence of the reciprocal WGM frequency shift on the angular velocity of the resonator (top left) and the reciprocal WGM frequency shift in the presence of an alternating bias and rotation of the system relative to inertial space with a velocity Ωx (right)

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11. Fig. 10. Output characteristics of the angular velocity sensor (I – when measuring the angular velocity without using a bias, II – with an alternating bias with Ωb0 = 5 rad/s, III – with Ωb0 = 40 rad/s, IV – with Ωb0 = 1 000 rad/s)

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12. Fig. 11. Intensity of light at the outputs of the resonator (solid line 1 – I1 and I2 of the stationary resonator, dashed lines 2 and 3 – respectively I1 and I2 of the counterclockwise rotating resonator)

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13. Fig. 12. The angular velocity corresponding to the equality of the shifts ΔfC and ΔfS, at different radius of curvature R0 and resonator materials (curves I, II and III correspond to resonators made of fused silica, calcium fluoride, and PDMS 60 : 1 polymer)

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Copyright (c) 2023 Filatov Y.V., Kukaev A.S., Venediktov V.Y., Sevryugin A.A., Shalymov E.V.

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