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Control of gain and amplification in random lasers

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Abstract

We have studied the competition between the F324I1124 and F324I1324 gain channels in the Nd:Ba5(PO4)3F random laser. The strength of stimulated emission transitions was influenced by adding to the Nd-doped powder the powder of Cr4+:Y3Al5O12, absorbing light at λ=1.06μm, and the 1.32μm mirror, which provided an extra stimulated emission feedback. We have demonstrated a robustness of the Nd random laser to contamination. A much better control of the spectrum of the stimulated emission can be obtained by means of wavelength-selective external mirrors.

© 2007 Optical Society of America

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