Vol. 255, Issue 1, January 2022, pp. 35-43

Abstract: The problem of synchronizing counterpropagating waves in ring lasers is an integral part of the fundamental problem of synchronizing nonlinear oscillations. This phenomenon is inherent in all self-oscillating systems. As a continuation of the work 1 and extension of 2, an in-depth analysis of the obtained equations was performed for He Ne ring laser with an inhomogeneously broadened active medium. Alternative to backscattering explanation of the lock-in phenomena 3 was suggested and it is counterpropagating waves phase relationship through their nonlinear polarization. Comparative analysis of the behavior of frequencies and intensities for the single-mode ring laser working on a single isotope of Ne and on the mix of ²⁰Ne ²²Ne isotopes was conducted. Dependency of the lock-in threshold on different parameters including active medium pressure, cavity detuning, pumping current value, rotation speed, etc. were theoretically researched. The intensity of counterpropagating waves was analyzed. Theoretical predictions were compared with experimental data. The most important results are presented in this work.

Keywords: Ring laser, Nonlinear coupling, Frequency synchronization, Gyroscope.

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