Abstract
We have studied the competition between the and gain channels in the random laser. The strength of stimulated emission transitions was influenced by adding to the Nd-doped powder the powder of , absorbing light at , and the 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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