  It has recently been shown that the studies of strongly-interacting
electroweak symmetry breaking (EWSB) at photon colliders, via photon splitting
into $W$ pair followed by longitudinal $W$-boson scattering, could be possible.
Here we present a signal-background analysis for the scattering channels $W^+_L
W^-_L \to Z_L Z_L$ and $W^+_L W^-_L \to W^+_L W^-_L$ with background coming
from the standard model (SM) production of $\gamma\gamma \to WW ZZ$ and $WWWW$,
respectively. We illustrate the analysis using the SM with a heavy Higgs boson
$(m_H\approx 1$ TeV) to represent a typical strongly-interacting EWSB model and
the SM with a light Higgs boson ($m_H\approx 0.1$ TeV) to represent the
background. We come up with a set of kinematic acceptance to enhance the
signal-to-background ratio. Extension of the kinematic acceptance to other
strongly-interacting EWSB models is then trivial, and the signal cross sections
for various EWSB models are calculated. We found that it is very feasible to
probe the EWSB sector at a photon collider of center-of-mass energy of 2 TeV
with a luminosity of just 10~fb$^{-1}$.
