In the dense central regions of globular clusters close encounters of
two white dwarfs are relatively frequent (one or more strong
encounters per star in the lifetime of the cluster). Such encounters
should be potential sources of gravitational wave emission. Thus, it
is foreseeable that these collisions could be either detected by LISA
or they could contribute significantly to the background noise of the
detectors. We compute the gravitational wave pattern resulting from
these encounters for a broad range of system parameters, which include
the masses and the relative distances of the white dwarfs involved in
the encounter.