| 摘要 |
A dense wavelength division multiplexer (DWDM) module (10) includes a housing (1), a retainer (2), a plurality of DWDMs (3), a cover (4), a gasket ring (5) and a front seal (8). The retainer is fixed in the housing and receives the DWDMs therein. Optical fibers communicating between the DWDMs and optical components outside the DWDM module pass through strain relief boots (81), which engage in through holes in a plug (82) of the front seal. The front seal is tightly fixed in a slot (124) of the housing, forming a reliable seal at the front of the housing. The gasket ring is pressed into a recess (122) of the housing. The cover is then fixed on the housing and presses against the gasket ring. Therefore, a tight hermetical seal is formed between the housing and the cover.
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