A small form-factor pluggable double-density multiple passive optical network module

A Hexa-bidirectional optical subassembly

• Hexa-BOSA—package comprising:
• three receiver optical subassemblies—ROSA—, each in a transistor outline (TO) package;
• three transmitter optical subassemblies—TOSA—, each in a TO package;
• five wavelength division multiplexing filters—WDM filter—and five slots to mount the WDM filters;
• and
• an optical coupling receptacle with an optical fiber attached and which is in optical communication with all the TOSAs and ROSAs inside the package;
• wherein,
• all the ROSAs and TOSAs are misaligned between each other;
• and wherein
• all the WDM filters are placed at an angle of about fourth-five degrees concerning a direction of light coming from or going to the optical fiber, and
• each WDM filter is aligned with the respective ROSA or TOSA, regarding the wavelength that the WDM filter reflects.