  Taking into account that Rold\'an et al.'s ample spectrum contractions have
managed to extend and unify more than ten distinct families of contractive
mappings in the setting of metric spaces, in this manuscript we present a first
study on how such concept can be implemented in the more general framework of
fuzzy metric spaces in the sense of Kramosil and Mich\'alek. We introduce two
distinct approaches to the concept of fuzzy ample spectrum contractions and we
prove general results about existence and uniqueness of fixed points. The
proposed notions enjoys the following advantages with respect to previous
approaches: (1) they permit to develop fixed point theory in a very general
fuzzy framework (for instance, the underlying fuzzy space is not necessarily
complete); (2) the procedures that we employ are able to overcome the technical
drawbacks raising in fuzzy metric spaces in the sense of Kramosil and
Mich\'alek (that do not appear in fuzzy metric spaces in the sense of George
and Veeramani); (3) we introduce a novel property about sequences that are not
Cauchy in a fuzzy space in order to consider a more general context than
non-Archimedean fuzzy metric spaces; (4) the contractivity condition associated
to fuzzy ample spectrum contractions does not have to be expressed in separate
variables; (5) such fuzzy contractions generalize some well-known families of
fuzzy contractive operators such that the class of all Mihet's fuzzy
$\psi$-contractions. As a consequence of these properties, this study gives a
positive partial answer to a question posed by this author some years ago.
