Kuwala kwa laser kumapambana mu monochromaticity, kuwala, mayendedwe, ndi kugwirizana, kumapangitsa kukhala koyenera kugwiritsa ntchito molondola. Wopangidwa ndi mpweya wosonkhezera ndi kukulitsa kwa kuwala, mphamvu zake zotulutsa mphamvu zambiri zimafuna zozizira zamadzi m'mafakitale kuti zigwire ntchito mokhazikika komanso moyo wautali.