External laser source transmission system and manufacturing method of the same

Abstract

An external laser source transmission system includes multiple external laser source transmission modules, a system substrate and multiple optical connecting elements. The system substrate is configured to carry the external laser source transmission modules. Each external laser source transmission module includes a light emitting assembly, a polarization-maintaining fiber assembly and an adaptor. The light emitting assembly includes a substrate and a molding element, and the substrate is configured to carry the laser, the lens and the isolator. The molding element is used to mold a laser, a lens, an isolator and the substrate. The polarization-maintaining fiber assembly is engaged with the light emitting assembly, and the polarization-maintaining fiber assembly includes a polarization-maintaining fiber and a cylindrical enclosing member. The adaptor is engaged with the light emitting assembly and the cylindrical enclosing member. The cylindrical enclosing member rotates relative to the adaptor so as to optimize polarization extinction ratio. The multiple optical connecting elements are coupled to the polarization-maintaining fibers of the multiple external laser source transmission modules.

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