In　this　paper,　a　scheme　is　presented　for　generation　of　W-type　entangled　states　for　n　atoms　trapped　in　separated　cavities　connected　by　optical　fibers.　The　scheme　only　requires　a　single　atom-cavity-fiber　interaction　and　no　classical　field　is　needed.　Due　to　these　features,　the　scheme　is　simpler　and　more　robust　against　decoherence　than　the　previous　ones.　The　scheme　can　also　be　used　to　realize　quantum　state　transfer　and　controlled　phase　gates　between　qubits　located　at　distant　nodes　of　a　quantum　network.