The study of bottom quark jets is important both for precision
measurements of known processes and for the discovery of new physics.
Bottom quarks are predicted to be involved in many exotic processes,
including the decay of Higgs bosons.  The specific production of pairs
of b-quark jets is an important QCD (quantum chromodynamic)
prediction.  We present recent measurements of the di-b-jet cross
section using data collected by the Collider Detector at Fermilab
(CDF) experiment from proton-antiproton collisions at a center of mass
energy of 1.96 TeV.  Results are obtained using two different trigger
methods and b-quark jets are tagged by identifying a secondary vertex
consistent with heavy flavour decay.  The experimental measurements
are compared to theoretical predictions.