  The optimal performance of adaptive optics systems can only be maintained if
the wavefront reference is bright and compact. Experience has shown that both
of these important criteria are remarkably difficult to achieve with laser
guide stars, and this contribution gives an account of the methods by which
ALFA attempts to reach them. First, the production of a high quality, high
power laser beam is described. However, this quality is unavoidably compromised
along the path to the launch telescope. In order to rectify this, a new set of
diagnostic tools which monitor the quality of the out-going beam has been
installed, and these are also described. Lastly, we outline a number of
possible modifications on which we are working. If successful, these may allow
a substantial improvement in the beam quality.
