We model spectra and pulse profiles of gamma-ray pulsars assuming that
the pulsar's magnetic axis is nearly aligned with its rotation axis.
In this model, the nonthermal energy of electrons flowing outward alon
g field lines connected to the light cylinder is efficiently converted
to gamma rays via magnetic Compton scattering of optical and soft X-r
ay photons. The hard photons initiate a pair cascade in the pulsar mag
netosphere through magnetic pair production followed by synchrotron em
ission. The calculated spectra are used to fit gamma-ray pulsar observ
ations. This model produces a hollow cone of emission which can reprod
uce both the broad single-peaked and narrow double-peaked pulse profil
es observed from gamma-ray pulsars.