  We consider crystal chirp effects on SPDC when pumping at 800 nm. The typical
distribution produced in frequency-momentum space is a pop tab-like structure
which turns out to be suitable for the implementation of versatile light
sources. Our analyzes consider the effect of internal and external parameters
in the process; in the former we include the crystal chirp and length, while in
the latter temperature, as well as pump chirp and beam properties. We report
evidence of the appropriateness of SPDC from chirped crystals to manipulate the
frequency and transverse momentum properties of the light produced. We briefly
comment on potential usefulness of the types of light produced, in particular
for quantum information applications.
