Conclusions
Fer a ring laser, therefore, locking occurs at a threshold signal intensity (within the resonator) of ∼100 W/cm2. Here the intensity of the ring-laser radiation equals 20–35 kW/cm2-i. e., we obtain an energy gain of ≥102 with the spectrum of this laser being narrowed by a factor of ∼103.
The experimental results are in qualitative agreement with the existing theories.
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P. N. Lebedev Physics Institute, Academy of Sciences of the USSR. Translated from Izvestiya Vyssbikh Uchebnykh Zavedenii, Radiolizika, Vol. 17, No. 7, pp. 964–969, July, 1974.
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Bocharov, V.V., Zubarev, I.G. Using an external input to lock the frequency of a free-running solid-state laser with inhomogeneously broadened spectral lasing line. Radiophys Quantum Electron 17, 733–737 (1974). https://doi.org/10.1007/BF01037229
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DOI: https://doi.org/10.1007/BF01037229