  We investigate the steady-state photon-number squeezing and quantum
entanglement in a network of nondegenerate optical parametric oscillators
(NOPOs). We treat each NOPO with Shen's Raman laser model, whose lasing mode
provides a photon-number-squeezed state. Two dissipatively coupled NOPOs
satisfy Hillery-Zubairy's $HZ1$ entanglement criterion if they are pumped far
above the threshold and the dissipative coupling is sufficiently larger than
the NOPO cavity loss.
