Amplification of radiation due to the four-photon parametric process in potassium vapor |
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Authors: | M E Movsesyan A V Papoyan C B Shmavonyan |
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Institution: | (1) Institute of Physical Research, Armenian Academy of Sciences, 378410 Ashtarak - 2, Armenia |
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Abstract: | The results of the experimental investigation of the radiation amplification due to the stimulated four-photon parametric process in potassium vapor are reported. Two cells with active medium (an oscillatoramplifier system) are used in the experiments. The dominating role of IR radiation 6S → 5P (3.66 µm) in the amplification of violet radiation 5P → 4S (0.4 µm) generated due to the parametric process at two-photon excitation 4S → 6S is shown. This role is conditioned by optically pumped stimulated emission (OPSE). Optical conditions for the amplification of a seed radiation are determined in accordance with their intensity and the buffer gas (He) pressure. The problem of the image conversion from the IR to a visible one with quantum efficiency above 100% is discussed. |
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