Fine structure of the spectra of giant pulses from actively Q-switched solid-state lasers with injection of external radiation
A theoretical and experimental investigation was made of the problem of controlling the mode structure of the spectra of giant pulses from actively Q-switched solid-state lasers by injection of external radiation at a frequency independent of the natural frequencies of the resonator. A marked differ...
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Veröffentlicht in: | Sov. J. Quant. Electron. (Engl. Transl.); (United States) 1980-08, Vol.10 (8), p.990-994 |
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Sprache: | eng |
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Zusammenfassung: | A theoretical and experimental investigation was made of the problem of controlling the mode structure of the spectra of giant pulses from actively Q-switched solid-state lasers by injection of external radiation at a frequency independent of the natural frequencies of the resonator. A marked difference was observed between the spectral kinetic characteristics of giant pulses from neodymium-glass and ruby lasers. On the basis of a comparison with previously established differences in the free-lasing dynamics, an explanation of this observation by nonlinear mode interaction is proposed and confirmed theoretically and experimentally. A method of improving the mode selection efficiency under giant pulse conditions using passive negative feedback is proposed and implemented experimentally using a neodymium-glass laser. Giant pulse generation with a spectral width of < or =5 x 10/sup -4/cm/sup -1/ and a power of 20 MW was obtained using an actively Q-switched neodymium-glass laser. |
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ISSN: | 0049-1748 2169-530X |
DOI: | 10.1070/QE1980v010n08ABEH010526 |