SMF vs MMF mode, a short 2 pages read at:
http://www.plexxi.com/wp-content/uploads/2013/11/Key-Considerations-for-Selecting-Data-Center-Fiber-Cabling.pdf
Bottom line, for future needs, SMF should be the choice according to this co... future will tell
POET's VCSEL (IF SUCESSUFULLY BROUGHT TO COMMERCIALIZATION, no pun intended) will be :
- SMF compatible
- Will be smaller (form factor) than any silicon photonic packaged transceivers (reducing the BOM) known as of today
- and will be way less power-hungry (which means less heat and I really hope you get that).
Regards,