lased

from The Collaborative International Dictionary of English v.0.48

lase \lase\ (l[=a]z) v. i. [imp. & p. p. {lased} (l[=a]zd); p.
   pr. & vb. n. {lasing}.] [by back-formation from {laser}. See
   {laser}.]
   To give off a beam of coherent light; -- of a laser.
   [PJC]