The package adopts metal cavity brazing or melt seal feed through assembly, optical tube structure.WSS package cavity is usually large, generally using the kovar alloy plate 6-side welding cavity structure (if the cavity is small, low cost aluminum alloy overall processing structure can be adopted). The large size cavity integrated through high precision mold design can greatly reduce the material cost and machining cost. The production process of these package products is complex, difficult integration and high cost control requirements.