  In this essay it will be shown that the introduction of a modification to
Heisenberg algebra (here this feature means the existence of a minimal
obserlvable length), as a fundamental part of the quantization process of the
electrodynamical field, renders states in which the uncertainties in the two
quadrature components violate the usual Heisenberg uncertainty relation. Hence
in this context it may be asserted that any physically realistic generalization
of the uncertainty principle must include, not only a minimal observable
length, but also a minimal observable momentum.
