D.M. Ambartsumyan

Bio: D.M. Ambartsumyan is an academic researcher from Moscow Institute of Physics and Technology. The author has contributed to research in topics: Gyroscope & Ring laser gyroscope. The author has an hindex of 1, co-authored 7 publications receiving 4 citations.

Multifrequency Solid-State Ring Laser Gyroscope Based on YAG:Cr 4+

Abstract: We report our recent progress towards a multifrequency solid-state ring laser gyro, based on the YAG:Cr4+ broadband gain medium and operating in the mode-locking regime. Improved stability and reduced noise are achieved as the result of mode-locking. A model of the bidirectional generation dynamics during mode-locking, based on the Lamb theory, is provided. The readout system of beat signals of counterpropagating waves is demonstrated. The influence of the phase and the depth of modulation on the stable mode-locking is measured. Furthermore, lasing parameters, ensuring maximum accuracy of angular measurements, are determined.

Measurement and active reduction of the coupling of counterpropagating waves due to scattering in a laser gyroscope when it operates with a frequency biasing

Abstract: In this paper we present methods of measurement and reduction of the magnitude of coupling of counterpropagating waves in a laser gyroscope when it operates with a frequency biasing. The proposed complex methods for measuring this quantity are based on the amplitude modulation of one of the waves and the phase restoration of the beat signal. The obtained values of the waves coupling magnitude were used to control piezoelectric actuators that regulate the gyroscope cavity geometry in order to minimize the counterpropagating waves coupling. The magnitude of the coupling decreased in 2-5 times.

Creation of Conditions for the Maximum Suppression of Magnetic Field Influence on Zero Drift in Four-Frequency and Quasi-Four-Frequency Zeeman Laser Gyroscopes

Abstract: The research conducted in this work, was aimed at finding conditions that suppress the influence of the magnetic field on zero drift in Zeeman four-frequency and quasi-four-frequency laser gyroscopes. We determined the optimal areas within the gain contour in the active medium. During operation in those areas the maximum suppression of the influence of the magnetic field on the drift of the gyroscope is provided. A gyroscope control system that switches gyroscope to the regime of minimum magnetic sensitivity has been created. We obtained weakening of the effect of the magnetic field on zero drift by more than three orders of magnitude.

Controlling the coupling of counterpropagating waves in a laser gyroscope with a nonplanar cavity when working with a Zeeman dither

Abstract: In this paper we investigate the effect of the coupling of counterpropagating waves, caused by radiation scattering, on the characteristics of a Zeeman laser gyroscope We present methods for measurement of this effect in a laser gyroscope when it operates with a frequency biasing The proposed complex methods for measuring this quantity are based on the amplitude modulation of one of the waves and the phase restoration of the beat signal The obtained values of the waves coupling magnitude were used to control piezoelectric actuators that regulate the gyroscope cavity length in order to minimize the coupling of the counterpropagating waves The magnitude of the coupling decreased by a factor of 2–5 times The laser gyroscope parameters were measured when it operated with the control system of the counterpropagating waves coupling

Coupling of Counterpropagating Waves in Two-and Four-Frequency Zeeman Laser Gyroscopes with a Nonplanar Cavity

Abstract: The paper considers the effect of coupling of counterpropagating waves caused by scattering of radiation in two- and four-frequency Zeeman laser gyroscopes on their characteristics. Methods for measuring the magnitude of coupling of counterpropagating waves via determination of parameters of the amplitude modulation of counterpropagating waves and via reconstruction of the beat signal phase are presented. The obtained values of the coupling magnitude were used to minimize it by 2–7 times by the geometry adjustment of the gyroscope cavity. Measurements of the zero drift and other parameters of two-frequency and four-frequency laser gyroscopes at different coupling magnitudes of counterpropagating waves have been carried out.

Creation of Conditions for the Maximum Suppression of Magnetic Field Influence on Zero Drift in Four-Frequency and Quasi-Four-Frequency Zeeman Laser Gyroscopes

Abstract: The research conducted in this work, was aimed at finding conditions that suppress the influence of the magnetic field on zero drift in Zeeman four-frequency and quasi-four-frequency laser gyroscopes. We determined the optimal areas within the gain contour in the active medium. During operation in those areas the maximum suppression of the influence of the magnetic field on the drift of the gyroscope is provided. A gyroscope control system that switches gyroscope to the regime of minimum magnetic sensitivity has been created. We obtained weakening of the effect of the magnetic field on zero drift by more than three orders of magnitude.

Longitudal modes lock-in in YAG:Cr 4+ laser gyroscope at mode locking regime and its influence on lock-in of counterpropagating waves

Abstract: In this paper we present the results of research the dynamics of longitudinal modes frequencies lock-in on mode locking and its influence on lock-in of counter waves in laser gyroscope on YAG:Cr4+. We have developed the dynamic model of generation in mode-locking for the gyroscope on YAG:Cr4+. We have performed the analysis of mode locking regimes, lock-in of counter waves and possibilities of angular value registration for gyroscopes on YAG:Cr4+.

Four-Frequency Zeeman Laser Gyroscope with Nonplanar Symmetric Resonator and Its Perimeter Control System

Abstract: This paper presents the results of our work on a four-frequency Zeeman laser gyroscope with a non-planar cavity in the form of a regular tetrahedron with a cavity length of 28 cm. A new physical principle for stabilizing the cavity length based on measuring the beat signal of orthogonal polarization modes is presented. An analysis of various other meth-ods for stabilizing the cavity length and ensuring the lasing frequency stability is made. A method for improving the sub-traction of the influence of external magnetic fields due to the optimal choice of the perimeter control system operation point is shown. We also analyzed the factors influencing the possibility of further improvement of measurement accuracy in the created four-frequency laser gyroscope.

Laser Gyroscope Parameters Measuring System Development

Abstract: Gyroscope with lasers implementation is an important field of study with great potential. An integrating rate gyroscope is called a laser gyroscope (LG). The interference occurs in the form of a lock-in zone (LZ) during the operation of the LG, which leads to insensitivity at low rotation speeds, e.g. a ship, a submarine, where the speed is less than the threshold. In this case, the LG is practically useless in the rotational speed determination. The impact of dithering on the LZ was investigated by modeling the LG operation equation and a measuring stand that reduces the effect of the LZ at low angular velocities was developed.

Laser Gyroscope Mechanical Dither Control Device

Abstract: The system for digital control of laser gyroscope mechanical dither making use for its operation of inertial sensor primary signals has been developed and tested. The results received after the developed system being tested are represented.