  We have theoretically investigated the possibility of using any of several
continuous-variable Bell-type inequalities - for which the dichotomic
measurements are achieved with coarse-grained quadrature (homodyne)
measurements - in a multi-party configuration where each participant is given a
section, in the frequency domain, of the output of an optical parametric
oscillator which has been synchronously-pumped with a frequency comb. Such
light sources are undergoing intense study due to their novel properties,
including the potential for production of light entangled in many hundreds of
physical modes - a critical component for many proposals in optical or
hybrid-optical quantum computation proposals. The situation we study notably
uses only highly-efficient optical homodyne detection, meaning that in such
systems the fair-sampling loophole would be relatively easy to avoid.
