FIBER OPTIC DFB laser module EMITTER, 1368-1372nm, THROUGH HOLE MOUNT FIBER OPTIC DFB laser module EMITTER, 1408-1412nm, THROUGH HOLE MOUNT FIBER OPTIC DFB laser module EMITTER, 1508-1512nm, THROUGH HOLE MOUNT FIBER OPTIC DFB laser module EMITTER, 1607-1613nm, THROUGH HOLE MOUNT FIBER OPTIC DFB laser module EMITTER, 1568-1572nm, THROUGH HOLE MOUNT