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Repetitively pulsed cryogenically cooled quasi-sealed-off slab RF discharge first-overtone CO laser

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Abstract

A slab first-overtone CO laser of improved design excited by repetitively pulsed RF discharge was researched and developed. Its quasi-sealed-off operation appeared to be possible only by using active gas mixture composition with extremely high content of oxygen — up to 50 % with respect to CO concentration. Average output power of the first-overtone CO laser came up to ~2 W with the efficiency of ~2 %. The laser spectrum obtained by using three sets of output couplers consisted of more than 100 vibrational–rotational spectral lines in 28 vibrational first-overtone bands of CO molecule within 2.55÷3.90 μm wavelength range. The number of laser radiation pulses which could be produced by the laser in sealed-off mode of operation (without gas mixture renovation) reached ~5×105 at the averaged output power near its maximum, and ~106 at lower (near its half-maximum) averaged output power. Special features of laser radiation temporal behavior were discussed. Under repetitively pulse pump with repetition rate from 300 up to 7500 Hz, a temporal profile of the CO laser radiation changed from the train of time-separated laser pulses with high peak power to quasi-CW mode of operation.

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Acknowledgments

This research was supported by the Russian Science Foundation (Grant No. 16-19-10619).

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Authors and Affiliations

  1. P.N. Lebedev Physical Institute of Russian Academy of Sciences, 53 Leninsky prosp., Moscow, Russia, 119991

    A. A. Ionin, A. Yu. Kozlov, O. A. Rulev, L. V. Seleznev & D. V. Sinitsyn

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  1. A. A. Ionin
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  2. A. Yu. Kozlov
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  3. O. A. Rulev
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  4. L. V. Seleznev
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  5. D. V. Sinitsyn
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Correspondence to D. V. Sinitsyn.

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Ionin, A.A., Kozlov, A.Y., Rulev, O.A. et al. Repetitively pulsed cryogenically cooled quasi-sealed-off slab RF discharge first-overtone CO laser. Appl. Phys. B 122, 183 (2016). https://doi.org/10.1007/s00340-016-6458-0

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  • DOI: https://doi.org/10.1007/s00340-016-6458-0

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