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MEISU hermetic sealing fiber array are realized by gold-coating the fiber cladding before inserting them into a metal (KOVAR) tube, gap between fibers and tube is fully filled with sodering tin, the metal (KOVAR) tube is gold-coated as well to prevent it from oxidization. Such fiber arrays are commonly used in optical devices and modules that require air-tight packaging, the gold-coated Kover tube is easy to be fixed in optical devices using soldering tin and achieve air-tightness.