The Baikal Neutrino experiment: NT200+NT200+ and beyond

The 10 Mton scale Neutrino telescope NT200+NT200+ is operating in Lake Baikal since April, 2005. It's main physics goal is the detection of high energy neutrino cascades in the 102102–105TeV energy range. The NT200+NT200+ sensitivity to astrophysical diffuse neutrinos is four times that of it's predecessor NT200 the telescope that has been operating since 1998, yielding a variety of physics results. A km-scale (Gigaton Volume) Neutrino telescope in Lake Baikal is planned, the R&D phase has started in 2006. We give the basic layout of this Baikal km3-detector, which will be made of building blocks similar to NT200+NT200+.