  This study investigates the potential of a photon collider for measuring the
two photon partial width times the branching ratio of a light Higgs boson. The
analysis is based on the reconstruction of the Higgs events produced in the
gamma gamma -> h process, followed by Higgs decay into a b bbar pair. A
statistical error of the measurement of the two-photon width times the b bbar
branching ratio of the Higgs boson is found to be 1.7% with an integrated
luminosity of 80 fb^-1 in the high energy part of the spectrum.
